Mercurial > repos > shellac > guppy_basecaller

annotate env/lib/python3.7/site-packages/backports/configparser/helpers.py @ 2:6af9afd405e9 draft

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
"planemo upload commit 0a63dd5f4d38a1f6944587f52a8cd79874177fc1"
author shellac
date Thu, 14 May 2020 14:56:58 -0400
parents 26e78fe6e8c4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 #!/usr/bin/env python
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2 # -*- coding: utf-8 -*-
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3
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4 from __future__ import absolute_import
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5 from __future__ import division
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6 from __future__ import print_function
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7 from __future__ import unicode_literals
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8
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9 import abc
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10 import os
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11
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12 try:
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13 from collections.abc import MutableMapping
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14 except ImportError:
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15 from collections import MutableMapping
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16
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17 try:
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18 from collections import UserDict
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19 except ImportError:
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20 from UserDict import UserDict
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21
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22 try:
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23 from collections import OrderedDict
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24 except ImportError:
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25 from ordereddict import OrderedDict
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26
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27 try:
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28 import pathlib
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29 except ImportError:
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30 pathlib = None
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31
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32 from io import open
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33 import sys
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34
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35 try:
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36 from thread import get_ident
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37 except ImportError:
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38 try:
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39 from _thread import get_ident
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40 except ImportError:
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41 from _dummy_thread import get_ident
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42
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43
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44 __all__ = ['UserDict', 'OrderedDict', 'open']
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45
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46
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47 PY2 = sys.version_info[0] == 2
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48 PY3 = sys.version_info[0] == 3
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49
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50 native_str = str
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51 str = type('str')
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52
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53
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54 def from_none(exc):
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55 """raise from_none(ValueError('a')) == raise ValueError('a') from None"""
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56 exc.__cause__ = None
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57 exc.__suppress_context__ = True
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58 return exc
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59
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60
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61 # from reprlib 3.2.1
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62 def recursive_repr(fillvalue='...'):
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63 'Decorator to make a repr function return fillvalue for a recursive call'
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64
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65 def decorating_function(user_function):
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66 repr_running = set()
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67
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68 def wrapper(self):
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69 key = id(self), get_ident()
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70 if key in repr_running:
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71 return fillvalue
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72 repr_running.add(key)
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73 try:
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74 result = user_function(self)
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75 finally:
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76 repr_running.discard(key)
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77 return result
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78
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79 # Can't use functools.wraps() here because of bootstrap issues
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80 wrapper.__module__ = getattr(user_function, '__module__')
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81 wrapper.__doc__ = getattr(user_function, '__doc__')
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82 wrapper.__name__ = getattr(user_function, '__name__')
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83 wrapper.__annotations__ = getattr(user_function, '__annotations__', {})
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84 return wrapper
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85
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86 return decorating_function
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87
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88
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89 # from collections 3.2.1
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90 class _ChainMap(MutableMapping):
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91 ''' A ChainMap groups multiple dicts (or other mappings) together
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92 to create a single, updateable view.
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93
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94 The underlying mappings are stored in a list. That list is public and can
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95 accessed or updated using the *maps* attribute. There is no other state.
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96
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97 Lookups search the underlying mappings successively until a key is found.
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98 In contrast, writes, updates, and deletions only operate on the first
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99 mapping.
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100
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101 '''
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102
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103 def __init__(self, *maps):
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104 '''Initialize a ChainMap by setting *maps* to the given mappings.
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105 If no mappings are provided, a single empty dictionary is used.
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106
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107 '''
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108 self.maps = list(maps) or [{}] # always at least one map
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109
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110 def __missing__(self, key):
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111 raise KeyError(key)
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112
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113 def __getitem__(self, key):
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114 for mapping in self.maps:
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115 try:
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116 # can't use 'key in mapping' with defaultdict
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117 return mapping[key]
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118 except KeyError:
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119 pass
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120 # support subclasses that define __missing__
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121 return self.__missing__(key)
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122
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123 def get(self, key, default=None):
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124 return self[key] if key in self else default
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125
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126 def __len__(self):
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127 # reuses stored hash values if possible
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128 return len(set().union(*self.maps))
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129
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130 def __iter__(self):
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131 return iter(set().union(*self.maps))
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132
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133 def __contains__(self, key):
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134 return any(key in m for m in self.maps)
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135
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136 @recursive_repr()
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137 def __repr__(self):
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138 return '{0.__class__.__name__}({1})'.format(
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139 self, ', '.join(map(repr, self.maps))
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140 )
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141
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142 @classmethod
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143 def fromkeys(cls, iterable, *args):
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144 'Create a ChainMap with a single dict created from the iterable.'
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145 return cls(dict.fromkeys(iterable, *args))
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146
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147 def copy(self):
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148 """
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149 New ChainMap or subclass with a new copy of
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150 maps[0] and refs to maps[1:]
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151 """
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152 return self.__class__(self.maps[0].copy(), *self.maps[1:])
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153
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154 __copy__ = copy
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155
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156 def new_child(self): # like Django's Context.push()
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157 'New ChainMap with a new dict followed by all previous maps.'
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158 return self.__class__({}, *self.maps)
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159
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160 @property
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161 def parents(self): # like Django's Context.pop()
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162 'New ChainMap from maps[1:].'
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163 return self.__class__(*self.maps[1:])
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164
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165 def __setitem__(self, key, value):
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166 self.maps[0][key] = value
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167
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168 def __delitem__(self, key):
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169 try:
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170 del self.maps[0][key]
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171 except KeyError:
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172 raise KeyError('Key not found in the first mapping: {!r}'.format(key))
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173
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174 def popitem(self):
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175 """
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176 Remove and return an item pair from maps[0].
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177 Raise KeyError is maps[0] is empty.
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178 """
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179 try:
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180 return self.maps[0].popitem()
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181 except KeyError:
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182 raise KeyError('No keys found in the first mapping.')
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183
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184 def pop(self, key, *args):
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185 """
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186 Remove *key* from maps[0] and return its value.
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187 Raise KeyError if *key* not in maps[0].
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188 """
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189
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190 try:
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191 return self.maps[0].pop(key, *args)
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192 except KeyError:
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193 raise KeyError('Key not found in the first mapping: {!r}'.format(key))
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194
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195 def clear(self):
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196 'Clear maps[0], leaving maps[1:] intact.'
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197 self.maps[0].clear()
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198
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199
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200 try:
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201 from collections import ChainMap
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202 except ImportError:
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203 ChainMap = _ChainMap
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204
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205
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206 _ABC = getattr(
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207 abc,
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208 'ABC',
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209 # Python 3.3 compatibility
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210 abc.ABCMeta(native_str('__ABC'), (object,), dict(__metaclass__=abc.ABCMeta)),
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211 )
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212
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213
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214 class _PathLike(_ABC):
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215
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216 """Abstract base class for implementing the file system path protocol."""
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217
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218 @abc.abstractmethod
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219 def __fspath__(self):
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220 """Return the file system path representation of the object."""
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221 raise NotImplementedError
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222
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223 @classmethod
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224 def __subclasshook__(cls, subclass):
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225 return bool(
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226 hasattr(subclass, '__fspath__')
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227 # workaround for Python 3.5
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228 or pathlib
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229 and issubclass(subclass, pathlib.Path)
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230 )
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231
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232
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233 PathLike = getattr(os, 'PathLike', _PathLike)
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234
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235
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236 def _fspath(path):
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237 """Return the path representation of a path-like object.
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238
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239 If str or bytes is passed in, it is returned unchanged. Otherwise the
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240 os.PathLike interface is used to get the path representation. If the
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241 path representation is not str or bytes, TypeError is raised. If the
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242 provided path is not str, bytes, or os.PathLike, TypeError is raised.
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243 """
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244 if isinstance(path, (str, bytes)):
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245 return path
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246
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247 if not hasattr(path, '__fspath__') and isinstance(path, pathlib.Path):
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248 # workaround for Python 3.5
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249 return str(path)
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250
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251 # Work from the object's type to match method resolution of other magic
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252 # methods.
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253 path_type = type(path)
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254 try:
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255 path_repr = path_type.__fspath__(path)
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256 except AttributeError:
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257
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258 if hasattr(path_type, '__fspath__'):
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259 raise
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260 else:
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261 raise TypeError(
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262 "expected str, bytes or os.PathLike object, "
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263 "not " + path_type.__name__
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264 )
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265 if isinstance(path_repr, (str, bytes)):
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266 return path_repr
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267 else:
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268 raise TypeError(
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269 "expected {}.__fspath__() to return str or bytes, "
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270 "not {}".format(path_type.__name__, type(path_repr).__name__)
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271 )
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272
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273
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274 fspath = getattr(os, 'fspath', _fspath)