Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/boltons/dictutils.py @ 3:758bc20232e8 draft

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"planemo upload commit 2a0fe2cc28b09e101d37293e53e82f61762262ec"
author shellac
date Thu, 14 May 2020 16:20:52 -0400
parents 26e78fe6e8c4
children
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1 # -*- coding: utf-8 -*-
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2 """Python has a very powerful mapping type at its core: the :class:`dict`
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3 type. While versatile and featureful, the :class:`dict` prioritizes
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4 simplicity and performance. As a result, it does not retain the order
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5 of item insertion [1]_, nor does it store multiple values per key. It
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6 is a fast, unordered 1:1 mapping.
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7
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8 The :class:`OrderedMultiDict` contrasts to the built-in :class:`dict`,
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9 as a relatively maximalist, ordered 1:n subtype of
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10 :class:`dict`. Virtually every feature of :class:`dict` has been
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11 retooled to be intuitive in the face of this added
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12 complexity. Additional methods have been added, such as
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13 :class:`collections.Counter`-like functionality.
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14
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15 A prime advantage of the :class:`OrderedMultiDict` (OMD) is its
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16 non-destructive nature. Data can be added to an :class:`OMD` without being
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17 rearranged or overwritten. The property can allow the developer to
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18 work more freely with the data, as well as make more assumptions about
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19 where input data will end up in the output, all without any extra
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20 work.
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21
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22 One great example of this is the :meth:`OMD.inverted()` method, which
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23 returns a new OMD with the values as keys and the keys as values. All
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24 the data and the respective order is still represented in the inverted
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25 form, all from an operation which would be outright wrong and reckless
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26 with a built-in :class:`dict` or :class:`collections.OrderedDict`.
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27
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28 The OMD has been performance tuned to be suitable for a wide range of
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29 usages, including as a basic unordered MultiDict. Special
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30 thanks to `Mark Williams`_ for all his help.
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31
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32 .. [1] As of 2015, `basic dicts on PyPy are ordered
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33 <http://morepypy.blogspot.com/2015/01/faster-more-memory-efficient-and-more.html>`_,
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34 and as of December 2017, `basic dicts in CPython 3 are now ordered
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35 <https://mail.python.org/pipermail/python-dev/2017-December/151283.html>`_, as
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36 well.
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37 .. _Mark Williams: https://github.com/markrwilliams
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38
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39 """
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40
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41 try:
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42 from collections.abc import KeysView, ValuesView, ItemsView
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43 except ImportError:
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44 from collections import KeysView, ValuesView, ItemsView
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45
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46 import itertools
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47
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48 try:
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49 from itertools import izip_longest
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50 except ImportError:
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51 from itertools import zip_longest as izip_longest
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52
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53 try:
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54 from typeutils import make_sentinel
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55 _MISSING = make_sentinel(var_name='_MISSING')
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56 except ImportError:
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57 _MISSING = object()
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58
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59
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60 PREV, NEXT, KEY, VALUE, SPREV, SNEXT = range(6)
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61
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62
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63 __all__ = ['MultiDict', 'OMD', 'OrderedMultiDict', 'OneToOne', 'ManyToMany', 'subdict', 'FrozenDict']
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64
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65 try:
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66 profile
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67 except NameError:
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68 profile = lambda x: x
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69
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70
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71 class OrderedMultiDict(dict):
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72 """A MultiDict is a dictionary that can have multiple values per key
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73 and the OrderedMultiDict (OMD) is a MultiDict that retains
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74 original insertion order. Common use cases include:
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75
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76 * handling query strings parsed from URLs
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77 * inverting a dictionary to create a reverse index (values to keys)
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78 * stacking data from multiple dictionaries in a non-destructive way
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79
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80 The OrderedMultiDict constructor is identical to the built-in
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81 :class:`dict`, and overall the API constitutes an intuitive
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82 superset of the built-in type:
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83
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84 >>> omd = OrderedMultiDict()
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85 >>> omd['a'] = 1
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86 >>> omd['b'] = 2
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87 >>> omd.add('a', 3)
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88 >>> omd.get('a')
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89 3
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90 >>> omd.getlist('a')
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91 [1, 3]
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92
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93 Some non-:class:`dict`-like behaviors also make an appearance,
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94 such as support for :func:`reversed`:
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95
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96 >>> list(reversed(omd))
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97 ['b', 'a']
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98
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99 Note that unlike some other MultiDicts, this OMD gives precedence
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100 to the most recent value added. ``omd['a']`` refers to ``3``, not
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101 ``1``.
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102
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103 >>> omd
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104 OrderedMultiDict([('a', 1), ('b', 2), ('a', 3)])
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105 >>> omd.poplast('a')
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106 3
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107 >>> omd
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108 OrderedMultiDict([('a', 1), ('b', 2)])
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109 >>> omd.pop('a')
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110 1
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111 >>> omd
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112 OrderedMultiDict([('b', 2)])
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113
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114 If you want a safe-to-modify or flat dictionary, use
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115 :meth:`OrderedMultiDict.todict()`.
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116
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117 >>> from pprint import pprint as pp # preserve printed ordering
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118 >>> omd = OrderedMultiDict([('a', 1), ('b', 2), ('a', 3)])
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119 >>> pp(omd.todict())
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120 {'a': 3, 'b': 2}
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121 >>> pp(omd.todict(multi=True))
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122 {'a': [1, 3], 'b': [2]}
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123
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124 With ``multi=False``, items appear with the keys in to original
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125 insertion order, alongside the most-recently inserted value for
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126 that key.
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127
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128 >>> OrderedMultiDict([('a', 1), ('b', 2), ('a', 3)]).items(multi=False)
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129 [('a', 3), ('b', 2)]
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130
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131 .. warning::
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132
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133 ``dict(omd)`` changed behavior `in Python 3.7
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134 <https://bugs.python.org/issue34320>`_ due to changes made to
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135 support the transition from :class:`collections.OrderedDict` to
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136 the built-in dictionary being ordered. Before 3.7, the result
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137 would be a new dictionary, with values that were lists, similar
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138 to ``omd.todict(multi=True)`` (but only shallow-copy; the lists
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139 were direct references to OMD internal structures). From 3.7
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140 onward, the values became singular, like
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141 ``omd.todict(multi=False)``. For reliable cross-version
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142 behavior, just use :meth:`~OrderedMultiDict.todict()`.
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143
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144 """
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145 def __init__(self, *args, **kwargs):
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146 if len(args) > 1:
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147 raise TypeError('%s expected at most 1 argument, got %s'
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148 % (self.__class__.__name__, len(args)))
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149 super(OrderedMultiDict, self).__init__()
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150
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151 self._clear_ll()
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152 if args:
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153 self.update_extend(args[0])
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154 if kwargs:
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155 self.update(kwargs)
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156
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157 def _clear_ll(self):
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158 try:
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159 _map = self._map
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160 except AttributeError:
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161 _map = self._map = {}
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162 self.root = []
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163 _map.clear()
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164 self.root[:] = [self.root, self.root, None]
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165
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166 def _insert(self, k, v):
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167 root = self.root
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168 cells = self._map.setdefault(k, [])
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169 last = root[PREV]
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170 cell = [last, root, k, v]
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171 last[NEXT] = root[PREV] = cell
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172 cells.append(cell)
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173
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174 def add(self, k, v):
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175 """Add a single value *v* under a key *k*. Existing values under *k*
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176 are preserved.
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177 """
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178 values = super(OrderedMultiDict, self).setdefault(k, [])
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179 self._insert(k, v)
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180 values.append(v)
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181
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182 def addlist(self, k, v):
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183 """Add an iterable of values underneath a specific key, preserving
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184 any values already under that key.
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185
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186 >>> omd = OrderedMultiDict([('a', -1)])
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187 >>> omd.addlist('a', range(3))
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188 >>> omd
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189 OrderedMultiDict([('a', -1), ('a', 0), ('a', 1), ('a', 2)])
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190
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191 Called ``addlist`` for consistency with :meth:`getlist`, but
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192 tuples and other sequences and iterables work.
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193 """
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194 self_insert = self._insert
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195 values = super(OrderedMultiDict, self).setdefault(k, [])
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196 for subv in v:
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197 self_insert(k, subv)
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198 values.extend(v)
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199
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200 def get(self, k, default=None):
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201 """Return the value for key *k* if present in the dictionary, else
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202 *default*. If *default* is not given, ``None`` is returned.
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203 This method never raises a :exc:`KeyError`.
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204
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205 To get all values under a key, use :meth:`OrderedMultiDict.getlist`.
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206 """
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207 return super(OrderedMultiDict, self).get(k, [default])[-1]
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208
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209 def getlist(self, k, default=_MISSING):
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210 """Get all values for key *k* as a list, if *k* is in the
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211 dictionary, else *default*. The list returned is a copy and
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212 can be safely mutated. If *default* is not given, an empty
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213 :class:`list` is returned.
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214 """
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215 try:
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216 return super(OrderedMultiDict, self).__getitem__(k)[:]
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217 except KeyError:
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218 if default is _MISSING:
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219 return []
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220 return default
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221
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222 def clear(self):
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223 "Empty the dictionary."
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224 super(OrderedMultiDict, self).clear()
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225 self._clear_ll()
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226
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227 def setdefault(self, k, default=_MISSING):
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228 """If key *k* is in the dictionary, return its value. If not, insert
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229 *k* with a value of *default* and return *default*. *default*
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230 defaults to ``None``. See :meth:`dict.setdefault` for more
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231 information.
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232 """
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233 if not super(OrderedMultiDict, self).__contains__(k):
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234 self[k] = None if default is _MISSING else default
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235 return self[k]
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236
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237 def copy(self):
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238 "Return a shallow copy of the dictionary."
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239 return self.__class__(self.iteritems(multi=True))
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240
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241 @classmethod
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242 def fromkeys(cls, keys, default=None):
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243 """Create a dictionary from a list of keys, with all the values
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244 set to *default*, or ``None`` if *default* is not set.
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245 """
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246 return cls([(k, default) for k in keys])
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247
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248 def update(self, E, **F):
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249 """Add items from a dictionary or iterable (and/or keyword arguments),
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250 overwriting values under an existing key. See
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251 :meth:`dict.update` for more details.
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252 """
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253 # E and F are throwback names to the dict() __doc__
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254 if E is self:
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255 return
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256 self_add = self.add
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257 if isinstance(E, OrderedMultiDict):
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parents:
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258 for k in E:
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parents:
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259 if k in self:
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260 del self[k]
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261 for k, v in E.iteritems(multi=True):
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262 self_add(k, v)
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263 elif callable(getattr(E, 'keys', None)):
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264 for k in E.keys():
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265 self[k] = E[k]
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266 else:
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267 seen = set()
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268 seen_add = seen.add
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269 for k, v in E:
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270 if k not in seen and k in self:
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parents:
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271 del self[k]
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272 seen_add(k)
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273 self_add(k, v)
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274 for k in F:
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275 self[k] = F[k]
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276 return
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277
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278 def update_extend(self, E, **F):
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279 """Add items from a dictionary, iterable, and/or keyword
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280 arguments without overwriting existing items present in the
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281 dictionary. Like :meth:`update`, but adds to existing keys
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282 instead of overwriting them.
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283 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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284 if E is self:
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285 iterator = iter(E.items())
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286 elif isinstance(E, OrderedMultiDict):
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287 iterator = E.iteritems(multi=True)
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288 elif hasattr(E, 'keys'):
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289 iterator = ((k, E[k]) for k in E.keys())
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290 else:
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291 iterator = E
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292
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293 self_add = self.add
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294 for k, v in iterator:
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295 self_add(k, v)
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296
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297 def __setitem__(self, k, v):
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parents:
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298 if super(OrderedMultiDict, self).__contains__(k):
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299 self._remove_all(k)
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300 self._insert(k, v)
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301 super(OrderedMultiDict, self).__setitem__(k, [v])
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302
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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303 def __getitem__(self, k):
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parents:
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304 return super(OrderedMultiDict, self).__getitem__(k)[-1]
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305
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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306 def __delitem__(self, k):
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307 super(OrderedMultiDict, self).__delitem__(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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308 self._remove_all(k)
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309
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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310 def __eq__(self, other):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
311 if self is other:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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312 return True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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313 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
314 if len(other) != len(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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315 return False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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316 except TypeError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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317 return False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
318 if isinstance(other, OrderedMultiDict):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
319 selfi = self.iteritems(multi=True)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
320 otheri = other.iteritems(multi=True)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
321 zipped_items = izip_longest(selfi, otheri, fillvalue=(None, None))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
322 for (selfk, selfv), (otherk, otherv) in zipped_items:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
323 if selfk != otherk or selfv != otherv:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
324 return False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
325 if not(next(selfi, _MISSING) is _MISSING
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
326 and next(otheri, _MISSING) is _MISSING):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
327 # leftovers (TODO: watch for StopIteration?)
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parents:
diff changeset
328 return False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
329 return True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
330 elif hasattr(other, 'keys'):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
331 for selfk in self:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
332 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
333 other[selfk] == self[selfk]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
334 except KeyError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
335 return False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
336 return True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
337 return False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
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338
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
339 def __ne__(self, other):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
340 return not (self == other)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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341
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
342 def pop(self, k, default=_MISSING):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
343 """Remove all values under key *k*, returning the most-recently
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
344 inserted value. Raises :exc:`KeyError` if the key is not
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
345 present and no *default* is provided.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
346 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
347 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
348 return self.popall(k)[-1]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
349 except KeyError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
350 if default is _MISSING:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
351 raise KeyError(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
352 return default
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
353
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
354 def popall(self, k, default=_MISSING):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
355 """Remove all values under key *k*, returning them in the form of
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
356 a list. Raises :exc:`KeyError` if the key is not present and no
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
357 *default* is provided.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
358 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
359 super_self = super(OrderedMultiDict, self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
360 if super_self.__contains__(k):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
361 self._remove_all(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
362 if default is _MISSING:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
363 return super_self.pop(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
364 return super_self.pop(k, default)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
365
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
366 def poplast(self, k=_MISSING, default=_MISSING):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
367 """Remove and return the most-recently inserted value under the key
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
368 *k*, or the most-recently inserted key if *k* is not
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
369 provided. If no values remain under *k*, it will be removed
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
370 from the OMD. Raises :exc:`KeyError` if *k* is not present in
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
371 the dictionary, or the dictionary is empty.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
372 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
373 if k is _MISSING:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
374 if self:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
375 k = self.root[PREV][KEY]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
376 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
377 raise KeyError('empty %r' % type(self))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
378 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
379 self._remove(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
380 except KeyError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
381 if default is _MISSING:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
382 raise KeyError(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
383 return default
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384 values = super(OrderedMultiDict, self).__getitem__(k)
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385 v = values.pop()
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386 if not values:
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387 super(OrderedMultiDict, self).__delitem__(k)
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388 return v
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389
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390 def _remove(self, k):
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391 values = self._map[k]
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392 cell = values.pop()
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393 cell[PREV][NEXT], cell[NEXT][PREV] = cell[NEXT], cell[PREV]
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394 if not values:
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395 del self._map[k]
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396
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397 def _remove_all(self, k):
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398 values = self._map[k]
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diff changeset
399 while values:
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400 cell = values.pop()
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401 cell[PREV][NEXT], cell[NEXT][PREV] = cell[NEXT], cell[PREV]
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parents:
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402 del self._map[k]
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403
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404 def iteritems(self, multi=False):
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405 """Iterate over the OMD's items in insertion order. By default,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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406 yields only the most-recently inserted value for each key. Set
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407 *multi* to ``True`` to get all inserted items.
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408 """
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409 root = self.root
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410 curr = root[NEXT]
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411 if multi:
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412 while curr is not root:
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413 yield curr[KEY], curr[VALUE]
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414 curr = curr[NEXT]
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415 else:
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416 for key in self.iterkeys():
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417 yield key, self[key]
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418
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419 def iterkeys(self, multi=False):
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420 """Iterate over the OMD's keys in insertion order. By default, yields
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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421 each key once, according to the most recent insertion. Set
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422 *multi* to ``True`` to get all keys, including duplicates, in
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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423 insertion order.
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424 """
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425 root = self.root
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426 curr = root[NEXT]
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427 if multi:
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428 while curr is not root:
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429 yield curr[KEY]
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430 curr = curr[NEXT]
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431 else:
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432 yielded = set()
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433 yielded_add = yielded.add
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434 while curr is not root:
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435 k = curr[KEY]
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436 if k not in yielded:
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437 yielded_add(k)
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438 yield k
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439 curr = curr[NEXT]
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440
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441 def itervalues(self, multi=False):
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442 """Iterate over the OMD's values in insertion order. By default,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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443 yields the most-recently inserted value per unique key. Set
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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444 *multi* to ``True`` to get all values according to insertion
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445 order.
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446 """
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447 for k, v in self.iteritems(multi=multi):
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448 yield v
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449
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450 def todict(self, multi=False):
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451 """Gets a basic :class:`dict` of the items in this dictionary. Keys
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452 are the same as the OMD, values are the most recently inserted
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453 values for each key.
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454
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455 Setting the *multi* arg to ``True`` is yields the same
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456 result as calling :class:`dict` on the OMD, except that all the
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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457 value lists are copies that can be safely mutated.
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458 """
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459 if multi:
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diff changeset
460 return dict([(k, self.getlist(k)) for k in self])
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461 return dict([(k, self[k]) for k in self])
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462
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463 def sorted(self, key=None, reverse=False):
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464 """Similar to the built-in :func:`sorted`, except this method returns
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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465 a new :class:`OrderedMultiDict` sorted by the provided key
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
466 function, optionally reversed.
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diff changeset
467
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468 Args:
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diff changeset
469 key (callable): A callable to determine the sort key of
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
470 each element. The callable should expect an **item**
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
471 (key-value pair tuple).
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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472 reverse (bool): Set to ``True`` to reverse the ordering.
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473
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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474 >>> omd = OrderedMultiDict(zip(range(3), range(3)))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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475 >>> omd.sorted(reverse=True)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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476 OrderedMultiDict([(2, 2), (1, 1), (0, 0)])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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477
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
478 Note that the key function receives an **item** (key-value
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
479 tuple), so the recommended signature looks like:
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diff changeset
480
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diff changeset
481 >>> omd = OrderedMultiDict(zip('hello', 'world'))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
482 >>> omd.sorted(key=lambda i: i[1]) # i[0] is the key, i[1] is the val
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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483 OrderedMultiDict([('o', 'd'), ('l', 'l'), ('e', 'o'), ('l', 'r'), ('h', 'w')])
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484 """
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485 cls = self.__class__
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486 return cls(sorted(self.iteritems(multi=True), key=key, reverse=reverse))
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diff changeset
487
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diff changeset
488 def sortedvalues(self, key=None, reverse=False):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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489 """Returns a copy of the :class:`OrderedMultiDict` with the same keys
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490 in the same order as the original OMD, but the values within
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diff changeset
491 each keyspace have been sorted according to *key* and
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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492 *reverse*.
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493
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494 Args:
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495 key (callable): A single-argument callable to determine
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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496 the sort key of each element. The callable should expect
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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497 an **item** (key-value pair tuple).
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498 reverse (bool): Set to ``True`` to reverse the ordering.
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499
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500 >>> omd = OrderedMultiDict()
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diff changeset
501 >>> omd.addlist('even', [6, 2])
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diff changeset
502 >>> omd.addlist('odd', [1, 5])
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diff changeset
503 >>> omd.add('even', 4)
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diff changeset
504 >>> omd.add('odd', 3)
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505 >>> somd = omd.sortedvalues()
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diff changeset
506 >>> somd.getlist('even')
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diff changeset
507 [2, 4, 6]
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diff changeset
508 >>> somd.keys(multi=True) == omd.keys(multi=True)
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diff changeset
509 True
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diff changeset
510 >>> omd == somd
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511 False
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512 >>> somd
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513 OrderedMultiDict([('even', 2), ('even', 4), ('odd', 1), ('odd', 3), ('even', 6), ('odd', 5)])
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514
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diff changeset
515 As demonstrated above, contents and key order are
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516 retained. Only value order changes.
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517 """
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518 try:
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519 superself_iteritems = super(OrderedMultiDict, self).iteritems()
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520 except AttributeError:
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521 superself_iteritems = super(OrderedMultiDict, self).items()
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diff changeset
522 # (not reverse) because they pop off in reverse order for reinsertion
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diff changeset
523 sorted_val_map = dict([(k, sorted(v, key=key, reverse=(not reverse)))
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524 for k, v in superself_iteritems])
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diff changeset
525 ret = self.__class__()
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526 for k in self.iterkeys(multi=True):
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527 ret.add(k, sorted_val_map[k].pop())
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528 return ret
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529
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530 def inverted(self):
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531 """Returns a new :class:`OrderedMultiDict` with values and keys
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532 swapped, like creating dictionary transposition or reverse
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533 index. Insertion order is retained and all keys and values
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parents:
diff changeset
534 are represented in the output.
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535
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diff changeset
536 >>> omd = OMD([(0, 2), (1, 2)])
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537 >>> omd.inverted().getlist(2)
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538 [0, 1]
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diff changeset
539
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540 Inverting twice yields a copy of the original:
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diff changeset
541
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diff changeset
542 >>> omd.inverted().inverted()
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diff changeset
543 OrderedMultiDict([(0, 2), (1, 2)])
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parents:
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544 """
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545 return self.__class__((v, k) for k, v in self.iteritems(multi=True))
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546
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parents:
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547 def counts(self):
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diff changeset
548 """Returns a mapping from key to number of values inserted under that
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549 key. Like :py:class:`collections.Counter`, but returns a new
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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550 :class:`OrderedMultiDict`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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551 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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552 # Returns an OMD because Counter/OrderedDict may not be
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
553 # available, and neither Counter nor dict maintain order.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
554 super_getitem = super(OrderedMultiDict, self).__getitem__
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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555 return self.__class__((k, len(super_getitem(k))) for k in self)
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parents:
diff changeset
556
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parents:
diff changeset
557 def keys(self, multi=False):
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parents:
diff changeset
558 """Returns a list containing the output of :meth:`iterkeys`. See
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
559 that method's docs for more details.
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parents:
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560 """
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parents:
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561 return list(self.iterkeys(multi=multi))
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parents:
diff changeset
562
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
563 def values(self, multi=False):
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parents:
diff changeset
564 """Returns a list containing the output of :meth:`itervalues`. See
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
565 that method's docs for more details.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
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566 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
567 return list(self.itervalues(multi=multi))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
568
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
569 def items(self, multi=False):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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diff changeset
570 """Returns a list containing the output of :meth:`iteritems`. See
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parents:
diff changeset
571 that method's docs for more details.
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parents:
diff changeset
572 """
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diff changeset
573 return list(self.iteritems(multi=multi))
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parents:
diff changeset
574
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
575 def __iter__(self):
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parents:
diff changeset
576 return self.iterkeys()
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parents:
diff changeset
577
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parents:
diff changeset
578 def __reversed__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
579 root = self.root
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parents:
diff changeset
580 curr = root[PREV]
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parents:
diff changeset
581 lengths = {}
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parents:
diff changeset
582 lengths_sd = lengths.setdefault
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parents:
diff changeset
583 get_values = super(OrderedMultiDict, self).__getitem__
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
584 while curr is not root:
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parents:
diff changeset
585 k = curr[KEY]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
586 vals = get_values(k)
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587 if lengths_sd(k, 1) == len(vals):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
588 yield k
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
589 lengths[k] += 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
590 curr = curr[PREV]
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parents:
diff changeset
591
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
592 def __repr__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
593 cn = self.__class__.__name__
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
594 kvs = ', '.join([repr((k, v)) for k, v in self.iteritems(multi=True)])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
595 return '%s([%s])' % (cn, kvs)
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parents:
diff changeset
596
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
597 def viewkeys(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
598 "OMD.viewkeys() -> a set-like object providing a view on OMD's keys"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
599 return KeysView(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
600
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
601 def viewvalues(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
602 "OMD.viewvalues() -> an object providing a view on OMD's values"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
603 return ValuesView(self)
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shellac
parents:
diff changeset
604
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
605 def viewitems(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
606 "OMD.viewitems() -> a set-like object providing a view on OMD's items"
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
607 return ItemsView(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
608
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
609
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
610 # A couple of convenient aliases
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
611 OMD = OrderedMultiDict
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
612 MultiDict = OrderedMultiDict
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
613
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
614
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
615 class FastIterOrderedMultiDict(OrderedMultiDict):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
616 """An OrderedMultiDict backed by a skip list. Iteration over keys
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
617 is faster and uses constant memory but adding duplicate key-value
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
618 pairs is slower. Brainchild of Mark Williams.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
619 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
620 def _clear_ll(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
621 # TODO: always reset objects? (i.e., no else block below)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
622 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
623 _map = self._map
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
624 except AttributeError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
625 _map = self._map = {}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
626 self.root = []
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parents:
diff changeset
627 _map.clear()
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parents:
diff changeset
628 self.root[:] = [self.root, self.root,
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parents:
diff changeset
629 None, None,
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parents:
diff changeset
630 self.root, self.root]
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parents:
diff changeset
631
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
632 def _insert(self, k, v):
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parents:
diff changeset
633 root = self.root
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parents:
diff changeset
634 empty = []
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
635 cells = self._map.setdefault(k, empty)
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parents:
diff changeset
636 last = root[PREV]
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parents:
diff changeset
637
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
638 if cells is empty:
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parents:
diff changeset
639 cell = [last, root,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
640 k, v,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
641 last, root]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
642 # was the last one skipped?
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
643 if last[SPREV][SNEXT] is root:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
644 last[SPREV][SNEXT] = cell
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
645 last[NEXT] = last[SNEXT] = root[PREV] = root[SPREV] = cell
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
646 cells.append(cell)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
647 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
648 # if the previous was skipped, go back to the cell that
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
649 # skipped it
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
650 sprev = last[SPREV] if (last[SPREV][SNEXT] is not last) else last
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
651 cell = [last, root,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
652 k, v,
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
653 sprev, root]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
654 # skip me
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
655 last[SNEXT] = root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
656 last[NEXT] = root[PREV] = root[SPREV] = cell
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
657 cells.append(cell)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
658
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
659 def _remove(self, k):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
660 cells = self._map[k]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
661 cell = cells.pop()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
662 if not cells:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
663 del self._map[k]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
664 cell[PREV][SNEXT] = cell[SNEXT]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
665
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
666 if cell[PREV][SPREV][SNEXT] is cell:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
667 cell[PREV][SPREV][SNEXT] = cell[NEXT]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
668 elif cell[SNEXT] is cell[NEXT]:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
669 cell[SPREV][SNEXT], cell[SNEXT][SPREV] = cell[SNEXT], cell[SPREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
670
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
671 cell[PREV][NEXT], cell[NEXT][PREV] = cell[NEXT], cell[PREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
672
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
673 def _remove_all(self, k):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
674 cells = self._map.pop(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
675 while cells:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
676 cell = cells.pop()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
677 if cell[PREV][SPREV][SNEXT] is cell:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
678 cell[PREV][SPREV][SNEXT] = cell[NEXT]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
679 elif cell[SNEXT] is cell[NEXT]:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
680 cell[SPREV][SNEXT], cell[SNEXT][SPREV] = cell[SNEXT], cell[SPREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
681
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
682 cell[PREV][NEXT], cell[NEXT][PREV] = cell[NEXT], cell[PREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
683 cell[PREV][SNEXT] = cell[SNEXT]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
684
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
685 def iteritems(self, multi=False):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
686 next_link = NEXT if multi else SNEXT
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
687 root = self.root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
688 curr = root[next_link]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
689 while curr is not root:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
690 yield curr[KEY], curr[VALUE]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
691 curr = curr[next_link]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
692
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
693 def iterkeys(self, multi=False):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
694 next_link = NEXT if multi else SNEXT
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
695 root = self.root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
696 curr = root[next_link]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
697 while curr is not root:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
698 yield curr[KEY]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
699 curr = curr[next_link]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
700
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
701 def __reversed__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
702 root = self.root
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
703 curr = root[PREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
704 while curr is not root:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
705 if curr[SPREV][SNEXT] is not curr:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
706 curr = curr[SPREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
707 if curr is root:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
708 break
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
709 yield curr[KEY]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
710 curr = curr[PREV]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
711
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
712
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
713 _OTO_INV_MARKER = object()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
714 _OTO_UNIQUE_MARKER = object()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
715
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
716
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
717 class OneToOne(dict):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
718 """Implements a one-to-one mapping dictionary. In addition to
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
719 inheriting from and behaving exactly like the builtin
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
720 :class:`dict`, all values are automatically added as keys on a
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
721 reverse mapping, available as the `inv` attribute. This
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
722 arrangement keeps key and value namespaces distinct.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
723
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
724 Basic operations are intuitive:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
725
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
726 >>> oto = OneToOne({'a': 1, 'b': 2})
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
727 >>> print(oto['a'])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
728 1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
729 >>> print(oto.inv[1])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
730 a
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
731 >>> len(oto)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
732 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
733
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
734 Overwrites happens in both directions:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
735
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
736 >>> oto.inv[1] = 'c'
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
737 >>> print(oto.get('a'))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
738 None
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
739 >>> len(oto)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
740 2
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
741
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
742 For a very similar project, with even more one-to-one
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
743 functionality, check out `bidict <https://github.com/jab/bidict>`_.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
744 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
745 __slots__ = ('inv',)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
746
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
747 def __init__(self, *a, **kw):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
748 raise_on_dupe = False
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
749 if a:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
750 if a[0] is _OTO_INV_MARKER:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
751 self.inv = a[1]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
752 dict.__init__(self, [(v, k) for k, v in self.inv.items()])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
753 return
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
754 elif a[0] is _OTO_UNIQUE_MARKER:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
755 a, raise_on_dupe = a[1:], True
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
756
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
757 dict.__init__(self, *a, **kw)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
758 self.inv = self.__class__(_OTO_INV_MARKER, self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
759
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
760 if len(self) == len(self.inv):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
761 # if lengths match, that means everything's unique
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
762 return
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
763
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
764 if not raise_on_dupe:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
765 dict.clear(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
766 dict.update(self, [(v, k) for k, v in self.inv.items()])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
767 return
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
768
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
769 # generate an error message if the values aren't 1:1
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
770
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
771 val_multidict = {}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
772 for k, v in self.items():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
773 val_multidict.setdefault(v, []).append(k)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
774
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
775 dupes = dict([(v, k_list) for v, k_list in
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
776 val_multidict.items() if len(k_list) > 1])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
777
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
778 raise ValueError('expected unique values, got multiple keys for'
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
779 ' the following values: %r' % dupes)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
780
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
781 @classmethod
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
782 def unique(cls, *a, **kw):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
783 """This alternate constructor for OneToOne will raise an exception
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
784 when input values overlap. For instance:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
785
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
786 >>> OneToOne.unique({'a': 1, 'b': 1})
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
787 Traceback (most recent call last):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
788 ...
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
789 ValueError: expected unique values, got multiple keys for the following values: ...
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
790
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
791 This even works across inputs:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
792
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
793 >>> a_dict = {'a': 2}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
794 >>> OneToOne.unique(a_dict, b=2)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
795 Traceback (most recent call last):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
796 ...
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
797 ValueError: expected unique values, got multiple keys for the following values: ...
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
798 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
799 return cls(_OTO_UNIQUE_MARKER, *a, **kw)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
800
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
801 def __setitem__(self, key, val):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
802 hash(val) # ensure val is a valid key
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
803 if key in self:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
804 dict.__delitem__(self.inv, self[key])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
805 if val in self.inv:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
806 del self.inv[val]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
807 dict.__setitem__(self, key, val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
808 dict.__setitem__(self.inv, val, key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
809
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
810 def __delitem__(self, key):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
811 dict.__delitem__(self.inv, self[key])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
812 dict.__delitem__(self, key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
813
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
814 def clear(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
815 dict.clear(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
816 dict.clear(self.inv)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
817
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
818 def copy(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
819 return self.__class__(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
820
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
821 def pop(self, key, default=_MISSING):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
822 if key in self:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
823 dict.__delitem__(self.inv, self[key])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
824 return dict.pop(self, key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
825 if default is not _MISSING:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
826 return default
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
827 raise KeyError()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
828
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
829 def popitem(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
830 key, val = dict.popitem(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
831 dict.__delitem__(self.inv, val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
832 return key, val
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
833
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
834 def setdefault(self, key, default=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
835 if key not in self:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
836 self[key] = default
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
837 return self[key]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
838
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
839 def update(self, dict_or_iterable, **kw):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
840 if isinstance(dict_or_iterable, dict):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
841 for val in dict_or_iterable.values():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
842 hash(val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
843 keys_vals = list(dict_or_iterable.items())
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
844 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
845 for key, val in dict_or_iterable:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
846 hash(key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
847 hash(val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
848 keys_vals = list(dict_or_iterable)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
849 for val in kw.values():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
850 hash(val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
851 keys_vals.extend(kw.items())
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
852 for key, val in keys_vals:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
853 self[key] = val
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
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parents:
diff changeset
854
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
855 def __repr__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
856 cn = self.__class__.__name__
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
857 dict_repr = dict.__repr__(self)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
858 return "%s(%s)" % (cn, dict_repr)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
859
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
860
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
861 # marker for the secret handshake used internally to set up the invert ManyToMany
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
862 _PAIRING = object()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
863
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
864
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
865 class ManyToMany(object):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
866 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
867 a dict-like entity that represents a many-to-many relationship
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
868 between two groups of objects
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
869
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
870 behaves like a dict-of-tuples; also has .inv which is kept
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
871 up to date which is a dict-of-tuples in the other direction
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
872
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
873 also, can be used as a directed graph among hashable python objects
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
874 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
875 def __init__(self, items=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
876 self.data = {}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
877 if type(items) is tuple and items and items[0] is _PAIRING:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
878 self.inv = items[1]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
879 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
880 self.inv = self.__class__((_PAIRING, self))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
881 if items:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
882 self.update(items)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
883 return
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
884
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
885 def get(self, key, default=frozenset()):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
886 try:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
887 return self[key]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
888 except KeyError:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
889 return default
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
890
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
891 def __getitem__(self, key):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
892 return frozenset(self.data[key])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
893
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
894 def __setitem__(self, key, vals):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
895 vals = set(vals)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
896 if key in self:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
897 to_remove = self.data[key] - vals
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
898 vals -= self.data[key]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
899 for val in to_remove:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
900 self.remove(key, val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
901 for val in vals:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
902 self.add(key, val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
903
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
904 def __delitem__(self, key):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
905 for val in self.data.pop(key):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
906 self.inv.data[val].remove(key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
907 if not self.inv.data[val]:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
908 del self.inv.data[val]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
909
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
910 def update(self, iterable):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
911 """given an iterable of (key, val), add them all"""
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
912 if type(iterable) is type(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
913 other = iterable
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
914 for k in other.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
915 if k not in self.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
916 self.data[k] = other.data[k]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
917 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
918 self.data[k].update(other.data[k])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
919 for k in other.inv.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
920 if k not in self.inv.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
921 self.inv.data[k] = other.inv.data[k]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
922 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
923 self.inv.data[k].update(other.inv.data[k])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
924 elif callable(getattr(iterable, 'keys', None)):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
925 for k in iterable.keys():
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
926 self.add(k, iterable[k])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
927 else:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
928 for key, val in iterable:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
929 self.add(key, val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
930 return
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
931
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
932 def add(self, key, val):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
933 if key not in self.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
934 self.data[key] = set()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
935 self.data[key].add(val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
936 if val not in self.inv.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
937 self.inv.data[val] = set()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
938 self.inv.data[val].add(key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
939
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
940 def remove(self, key, val):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
941 self.data[key].remove(val)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
942 if not self.data[key]:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
943 del self.data[key]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
944 self.inv.data[val].remove(key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
945 if not self.inv.data[val]:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
946 del self.inv.data[val]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
947
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
948 def replace(self, key, newkey):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
949 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
950 replace instances of key by newkey
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
951 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
952 if key not in self.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
953 return
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
954 self.data[newkey] = fwdset = self.data.pop(key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
955 for val in fwdset:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
956 revset = self.inv.data[val]
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
957 revset.remove(key)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
958 revset.add(newkey)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
959
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
960 def iteritems(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
961 for key in self.data:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
962 for val in self.data[key]:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
963 yield key, val
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
964
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
965 def keys(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
966 return self.data.keys()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
967
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
968 def __contains__(self, key):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
969 return key in self.data
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
970
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
971 def __iter__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
972 return self.data.__iter__()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
973
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
974 def __len__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
975 return self.data.__len__()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
976
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
977 def __eq__(self, other):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
978 return type(self) == type(other) and self.data == other.data
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
979
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
980 def __repr__(self):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
981 cn = self.__class__.__name__
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
982 return '%s(%r)' % (cn, list(self.iteritems()))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
983
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
984
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
985 def subdict(d, keep=None, drop=None):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
986 """Compute the "subdictionary" of a dict, *d*.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
987
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
988 A subdict is to a dict what a subset is a to set. If *A* is a
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
989 subdict of *B*, that means that all keys of *A* are present in
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
990 *B*.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
991
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
992 Returns a new dict with any keys in *drop* removed, and any keys
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
993 in *keep* still present, provided they were in the original
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
994 dict. *keep* defaults to all keys, *drop* defaults to empty, so
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
995 without one of these arguments, calling this function is
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
996 equivalent to calling ``dict()``.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
997
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
998 >>> from pprint import pprint as pp
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
999 >>> pp(subdict({'a': 1, 'b': 2}))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1000 {'a': 1, 'b': 2}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1001 >>> subdict({'a': 1, 'b': 2, 'c': 3}, drop=['b', 'c'])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1002 {'a': 1}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1003 >>> pp(subdict({'a': 1, 'b': 2, 'c': 3}, keep=['a', 'c']))
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1004 {'a': 1, 'c': 3}
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1005
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1006 """
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1007 if keep is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1008 keep = d.keys()
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1009 if drop is None:
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1010 drop = []
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1011
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1012 keys = set(keep) - set(drop)
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1013
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1014 return type(d)([(k, v) for k, v in d.items() if k in keys])
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1015
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1016
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1017 class FrozenHashError(TypeError):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1018 pass
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1019
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1020
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1021 class FrozenDict(dict):
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1022 """An immutable dict subtype that is hashable and can itself be used
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1023 as a :class:`dict` key or :class:`set` entry. What
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1024 :class:`frozenset` is to :class:`set`, FrozenDict is to
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1025 :class:`dict`.
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1026
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
parents:
diff changeset
1027 There was once an attempt to introduce such a type to the standard
26e78fe6e8c4 "planemo upload commit c699937486c35866861690329de38ec1a5d9f783"
shellac
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1028 library, but it was rejected: `PEP 416 <https://www.python.org/dev/peps/pep-0416/>`_.
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1029
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1030 Because FrozenDict is a :class:`dict` subtype, it automatically
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1031 works everywhere a dict would, including JSON serialization.
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1032
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1033 """
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1034 __slots__ = ('_hash',)
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1035
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1036 def updated(self, *a, **kw):
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1037 """Make a copy and add items from a dictionary or iterable (and/or
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1038 keyword arguments), overwriting values under an existing
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1039 key. See :meth:`dict.update` for more details.
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1040 """
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1041 data = dict(self)
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1042 data.update(*a, **kw)
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1043 return type(self)(data)
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1044
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1045 @classmethod
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1046 def fromkeys(cls, keys, value=None):
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1047 # one of the lesser known and used/useful dict methods
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1048 return cls(dict.fromkeys(keys, value))
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1049
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1050 def __repr__(self):
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1051 cn = self.__class__.__name__
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1052 return '%s(%s)' % (cn, dict.__repr__(self))
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1053
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1054 def __reduce_ex__(self, protocol):
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1055 return type(self), (dict(self),)
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1056
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1057 def __hash__(self):
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1058 try:
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1059 ret = self._hash
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1060 except AttributeError:
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1061 try:
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1062 ret = self._hash = hash(frozenset(self.items()))
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1063 except Exception as e:
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1064 ret = self._hash = FrozenHashError(e)
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1065
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1066 if ret.__class__ is FrozenHashError:
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1067 raise ret
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1068
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1069 return ret
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1070
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1071 def __copy__(self):
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1072 return self # immutable types don't copy, see tuple's behavior
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1073
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1074 # block everything else
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1075 def _raise_frozen_typeerror(self, *a, **kw):
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1076 "raises a TypeError, because FrozenDicts are immutable"
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1077 raise TypeError('%s object is immutable' % self.__class__.__name__)
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1078
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1079 __setitem__ = __delitem__ = update = _raise_frozen_typeerror
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1080 setdefault = pop = popitem = clear = _raise_frozen_typeerror
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1081
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1082 del _raise_frozen_typeerror
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1083
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1084
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1085 # end dictutils.py