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annotate env/lib/python3.9/site-packages/boltons/funcutils.py @ 0:4f3585e2f14b draft default tip

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"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author shellac
date Mon, 22 Mar 2021 18:12:50 +0000
parents
children
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0
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1 # -*- coding: utf-8 -*-
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2 """Python's built-in :mod:`functools` module builds several useful
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3 utilities on top of Python's first-class function
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4 support. ``funcutils`` generally stays in the same vein, adding to and
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5 correcting Python's standard metaprogramming facilities.
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6 """
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7 from __future__ import print_function
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8
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9 import sys
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10 import re
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11 import inspect
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12 import functools
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13 import itertools
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14 from types import MethodType, FunctionType
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15
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16 try:
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17 xrange
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18 make_method = MethodType
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19 except NameError:
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20 # Python 3
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21 make_method = lambda desc, obj, obj_type: MethodType(desc, obj)
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22 basestring = (str, bytes) # Python 3 compat
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23 _IS_PY2 = False
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24 else:
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25 _IS_PY2 = True
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26
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27
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28 try:
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29 _inspect_iscoroutinefunction = inspect.iscoroutinefunction
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30 except AttributeError:
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31 # Python 3.4
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32 _inspect_iscoroutinefunction = lambda func: False
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33
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34
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35 try:
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36 from boltons.typeutils import make_sentinel
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37 NO_DEFAULT = make_sentinel(var_name='NO_DEFAULT')
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38 except ImportError:
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39 NO_DEFAULT = object()
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40
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41 try:
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42 from functools import partialmethod
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43 except ImportError:
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44 partialmethod = None
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45
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46
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47 _IS_PY35 = sys.version_info >= (3, 5)
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48 if not _IS_PY35:
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49 # py35+ wants you to use signature instead, but
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50 # inspect_formatargspec is way simpler for what it is. Copied the
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51 # vendoring approach from alembic:
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52 # https://github.com/sqlalchemy/alembic/blob/4cdad6aec32b4b5573a2009cc356cb4b144bd359/alembic/util/compat.py#L92
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53 from inspect import formatargspec as inspect_formatargspec
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54 else:
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55 from inspect import formatannotation
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56
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57 def inspect_formatargspec(
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58 args, varargs=None, varkw=None, defaults=None,
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59 kwonlyargs=(), kwonlydefaults={}, annotations={},
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60 formatarg=str,
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61 formatvarargs=lambda name: '*' + name,
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62 formatvarkw=lambda name: '**' + name,
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63 formatvalue=lambda value: '=' + repr(value),
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64 formatreturns=lambda text: ' -> ' + text,
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65 formatannotation=formatannotation):
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66 """Copy formatargspec from python 3.7 standard library.
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67 Python 3 has deprecated formatargspec and requested that Signature
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68 be used instead, however this requires a full reimplementation
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69 of formatargspec() in terms of creating Parameter objects and such.
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70 Instead of introducing all the object-creation overhead and having
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71 to reinvent from scratch, just copy their compatibility routine.
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72 """
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73
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74 def formatargandannotation(arg):
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75 result = formatarg(arg)
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76 if arg in annotations:
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77 result += ': ' + formatannotation(annotations[arg])
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78 return result
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79 specs = []
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80 if defaults:
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81 firstdefault = len(args) - len(defaults)
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82 for i, arg in enumerate(args):
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83 spec = formatargandannotation(arg)
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84 if defaults and i >= firstdefault:
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85 spec = spec + formatvalue(defaults[i - firstdefault])
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86 specs.append(spec)
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87 if varargs is not None:
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88 specs.append(formatvarargs(formatargandannotation(varargs)))
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89 else:
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90 if kwonlyargs:
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91 specs.append('*')
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92 if kwonlyargs:
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93 for kwonlyarg in kwonlyargs:
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94 spec = formatargandannotation(kwonlyarg)
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95 if kwonlydefaults and kwonlyarg in kwonlydefaults:
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96 spec += formatvalue(kwonlydefaults[kwonlyarg])
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97 specs.append(spec)
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98 if varkw is not None:
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99 specs.append(formatvarkw(formatargandannotation(varkw)))
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100 result = '(' + ', '.join(specs) + ')'
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101 if 'return' in annotations:
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102 result += formatreturns(formatannotation(annotations['return']))
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103 return result
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104
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105
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106 def get_module_callables(mod, ignore=None):
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107 """Returns two maps of (*types*, *funcs*) from *mod*, optionally
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108 ignoring based on the :class:`bool` return value of the *ignore*
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109 callable. *mod* can be a string name of a module in
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110 :data:`sys.modules` or the module instance itself.
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111 """
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112 if isinstance(mod, basestring):
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113 mod = sys.modules[mod]
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114 types, funcs = {}, {}
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115 for attr_name in dir(mod):
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116 if ignore and ignore(attr_name):
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117 continue
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118 try:
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119 attr = getattr(mod, attr_name)
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120 except Exception:
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121 continue
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122 try:
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123 attr_mod_name = attr.__module__
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124 except AttributeError:
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125 continue
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126 if attr_mod_name != mod.__name__:
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127 continue
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128 if isinstance(attr, type):
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129 types[attr_name] = attr
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130 elif callable(attr):
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131 funcs[attr_name] = attr
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132 return types, funcs
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133
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134
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135 def mro_items(type_obj):
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136 """Takes a type and returns an iterator over all class variables
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137 throughout the type hierarchy (respecting the MRO).
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138
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139 >>> sorted(set([k for k, v in mro_items(int) if not k.startswith('__') and 'bytes' not in k and not callable(v)]))
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140 ['denominator', 'imag', 'numerator', 'real']
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141 """
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142 # TODO: handle slots?
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143 return itertools.chain.from_iterable(ct.__dict__.items()
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144 for ct in type_obj.__mro__)
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145
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146
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147 def dir_dict(obj, raise_exc=False):
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148 """Return a dictionary of attribute names to values for a given
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149 object. Unlike ``obj.__dict__``, this function returns all
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150 attributes on the object, including ones on parent classes.
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151 """
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152 # TODO: separate function for handling descriptors on types?
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153 ret = {}
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154 for k in dir(obj):
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155 try:
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156 ret[k] = getattr(obj, k)
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157 except Exception:
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158 if raise_exc:
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159 raise
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160 return ret
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161
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162
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163 def copy_function(orig, copy_dict=True):
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164 """Returns a shallow copy of the function, including code object,
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165 globals, closure, etc.
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166
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167 >>> func = lambda: func
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168 >>> func() is func
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169 True
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170 >>> func_copy = copy_function(func)
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171 >>> func_copy() is func
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172 True
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173 >>> func_copy is not func
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174 True
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175
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176 Args:
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177 orig (function): The function to be copied. Must be a
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178 function, not just any method or callable.
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179 copy_dict (bool): Also copy any attributes set on the function
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180 instance. Defaults to ``True``.
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181 """
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182 ret = FunctionType(orig.__code__,
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183 orig.__globals__,
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184 name=orig.__name__,
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185 argdefs=getattr(orig, "__defaults__", None),
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186 closure=getattr(orig, "__closure__", None))
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187 if copy_dict:
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188 ret.__dict__.update(orig.__dict__)
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189 return ret
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190
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191
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192 def partial_ordering(cls):
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193 """Class decorator, similar to :func:`functools.total_ordering`,
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194 except it is used to define `partial orderings`_ (i.e., it is
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195 possible that *x* is neither greater than, equal to, or less than
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196 *y*). It assumes the presence of the ``__le__()`` and ``__ge__()``
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197 method, but nothing else. It will not override any existing
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198 additional comparison methods.
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199
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200 .. _partial orderings: https://en.wikipedia.org/wiki/Partially_ordered_set
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201
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202 >>> @partial_ordering
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203 ... class MySet(set):
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204 ... def __le__(self, other):
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205 ... return self.issubset(other)
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206 ... def __ge__(self, other):
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207 ... return self.issuperset(other)
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208 ...
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209 >>> a = MySet([1,2,3])
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210 >>> b = MySet([1,2])
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211 >>> c = MySet([1,2,4])
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212 >>> b < a
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213 True
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214 >>> b > a
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215 False
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216 >>> b < c
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217 True
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218 >>> a < c
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219 False
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220 >>> c > a
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221 False
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222 """
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223 def __lt__(self, other): return self <= other and not self >= other
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224 def __gt__(self, other): return self >= other and not self <= other
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225 def __eq__(self, other): return self >= other and self <= other
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226
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227 if not hasattr(cls, '__lt__'): cls.__lt__ = __lt__
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228 if not hasattr(cls, '__gt__'): cls.__gt__ = __gt__
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229 if not hasattr(cls, '__eq__'): cls.__eq__ = __eq__
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230
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231 return cls
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232
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233
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234 class InstancePartial(functools.partial):
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235 """:class:`functools.partial` is a huge convenience for anyone
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236 working with Python's great first-class functions. It allows
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237 developers to curry arguments and incrementally create simpler
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238 callables for a variety of use cases.
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239
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240 Unfortunately there's one big gap in its usefulness:
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241 methods. Partials just don't get bound as methods and
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242 automatically handed a reference to ``self``. The
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243 ``InstancePartial`` type remedies this by inheriting from
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244 :class:`functools.partial` and implementing the necessary
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245 descriptor protocol. There are no other differences in
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246 implementation or usage. :class:`CachedInstancePartial`, below,
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247 has the same ability, but is slightly more efficient.
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248
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249 """
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250 if partialmethod is not None: # NB: See https://github.com/mahmoud/boltons/pull/244
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251 @property
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252 def _partialmethod(self):
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253 return partialmethod(self.func, *self.args, **self.keywords)
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254
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255 def __get__(self, obj, obj_type):
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256 return make_method(self, obj, obj_type)
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257
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258
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259
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260 class CachedInstancePartial(functools.partial):
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261 """The ``CachedInstancePartial`` is virtually the same as
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262 :class:`InstancePartial`, adding support for method-usage to
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263 :class:`functools.partial`, except that upon first access, it
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264 caches the bound method on the associated object, speeding it up
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265 for future accesses, and bringing the method call overhead to
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266 about the same as non-``partial`` methods.
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267
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268 See the :class:`InstancePartial` docstring for more details.
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269 """
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270 if partialmethod is not None: # NB: See https://github.com/mahmoud/boltons/pull/244
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271 @property
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272 def _partialmethod(self):
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273 return partialmethod(self.func, *self.args, **self.keywords)
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274
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275 def __get__(self, obj, obj_type):
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276 # These assignments could've been in __init__, but there was
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277 # no simple way to do it without breaking one of PyPy or Py3.
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278 self.__name__ = None
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279 self.__doc__ = self.func.__doc__
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280 self.__module__ = self.func.__module__
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281
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282 name = self.__name__
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283 if name is None:
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284 for k, v in mro_items(obj_type):
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285 if v is self:
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286 self.__name__ = name = k
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287 if obj is None:
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288 return make_method(self, obj, obj_type)
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289 try:
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290 # since this is a data descriptor, this block
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291 # is probably only hit once (per object)
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292 return obj.__dict__[name]
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293 except KeyError:
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294 obj.__dict__[name] = ret = make_method(self, obj, obj_type)
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295 return ret
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296
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297
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298 partial = CachedInstancePartial
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299
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300
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301 def format_invocation(name='', args=(), kwargs=None, **kw):
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302 """Given a name, positional arguments, and keyword arguments, format
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303 a basic Python-style function call.
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304
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305 >>> print(format_invocation('func', args=(1, 2), kwargs={'c': 3}))
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306 func(1, 2, c=3)
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307 >>> print(format_invocation('a_func', args=(1,)))
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308 a_func(1)
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309 >>> print(format_invocation('kw_func', kwargs=[('a', 1), ('b', 2)]))
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310 kw_func(a=1, b=2)
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311
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312 """
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313 _repr = kw.pop('repr', repr)
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314 if kw:
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315 raise TypeError('unexpected keyword args: %r' % ', '.join(kw.keys()))
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316 kwargs = kwargs or {}
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317 a_text = ', '.join([_repr(a) for a in args])
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318 if isinstance(kwargs, dict):
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319 kwarg_items = [(k, kwargs[k]) for k in sorted(kwargs)]
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320 else:
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321 kwarg_items = kwargs
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322 kw_text = ', '.join(['%s=%s' % (k, _repr(v)) for k, v in kwarg_items])
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323
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324 all_args_text = a_text
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325 if all_args_text and kw_text:
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326 all_args_text += ', '
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327 all_args_text += kw_text
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328
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329 return '%s(%s)' % (name, all_args_text)
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330
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331
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332 def format_exp_repr(obj, pos_names, req_names=None, opt_names=None, opt_key=None):
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333 """Render an expression-style repr of an object, based on attribute
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334 names, which are assumed to line up with arguments to an initializer.
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335
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336 >>> class Flag(object):
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337 ... def __init__(self, length, width, depth=None):
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338 ... self.length = length
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339 ... self.width = width
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340 ... self.depth = depth
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341 ...
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342
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343 That's our Flag object, here are some example reprs for it:
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344
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345 >>> flag = Flag(5, 10)
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346 >>> print(format_exp_repr(flag, ['length', 'width'], [], ['depth']))
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347 Flag(5, 10)
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348 >>> flag2 = Flag(5, 15, 2)
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349 >>> print(format_exp_repr(flag2, ['length'], ['width', 'depth']))
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350 Flag(5, width=15, depth=2)
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351
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352 By picking the pos_names, req_names, opt_names, and opt_key, you
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353 can fine-tune how you want the repr to look.
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354
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355 Args:
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356 obj (object): The object whose type name will be used and
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357 attributes will be checked
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358 pos_names (list): Required list of attribute names which will be
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359 rendered as positional arguments in the output repr.
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360 req_names (list): List of attribute names which will always
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361 appear in the keyword arguments in the output repr. Defaults to None.
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362 opt_names (list): List of attribute names which may appear in
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363 the keyword arguments in the output repr, provided they pass
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364 the *opt_key* check. Defaults to None.
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365 opt_key (callable): A function or callable which checks whether
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366 an opt_name should be in the repr. Defaults to a
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367 ``None``-check.
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368
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369 """
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370 cn = obj.__class__.__name__
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371 req_names = req_names or []
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372 opt_names = opt_names or []
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373 uniq_names, all_names = set(), []
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374 for name in req_names + opt_names:
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375 if name in uniq_names:
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376 continue
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377 uniq_names.add(name)
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378 all_names.append(name)
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379
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380 if opt_key is None:
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381 opt_key = lambda v: v is None
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382 assert callable(opt_key)
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383
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384 args = [getattr(obj, name, None) for name in pos_names]
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385
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386 kw_items = [(name, getattr(obj, name, None)) for name in all_names]
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387 kw_items = [(name, val) for name, val in kw_items
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388 if not (name in opt_names and opt_key(val))]
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389
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390 return format_invocation(cn, args, kw_items)
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391
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392
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393 def format_nonexp_repr(obj, req_names=None, opt_names=None, opt_key=None):
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394 """Format a non-expression-style repr
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395
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396 Some object reprs look like object instantiation, e.g., App(r=[], mw=[]).
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397
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398 This makes sense for smaller, lower-level objects whose state
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399 roundtrips. But a lot of objects contain values that don't
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400 roundtrip, like types and functions.
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401
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402 For those objects, there is the non-expression style repr, which
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403 mimic's Python's default style to make a repr like so:
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404
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405 >>> class Flag(object):
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406 ... def __init__(self, length, width, depth=None):
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407 ... self.length = length
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408 ... self.width = width
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409 ... self.depth = depth
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410 ...
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411 >>> flag = Flag(5, 10)
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412 >>> print(format_nonexp_repr(flag, ['length', 'width'], ['depth']))
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413 <Flag length=5 width=10>
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414
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415 If no attributes are specified or set, utilizes the id, not unlike Python's
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416 built-in behavior.
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417
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418 >>> print(format_nonexp_repr(flag))
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419 <Flag id=...>
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420 """
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421 cn = obj.__class__.__name__
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422 req_names = req_names or []
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423 opt_names = opt_names or []
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424 uniq_names, all_names = set(), []
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425 for name in req_names + opt_names:
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426 if name in uniq_names:
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427 continue
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428 uniq_names.add(name)
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429 all_names.append(name)
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430
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431 if opt_key is None:
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432 opt_key = lambda v: v is None
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433 assert callable(opt_key)
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434
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435 items = [(name, getattr(obj, name, None)) for name in all_names]
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436 labels = ['%s=%r' % (name, val) for name, val in items
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437 if not (name in opt_names and opt_key(val))]
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438 if not labels:
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439 labels = ['id=%s' % id(obj)]
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440 ret = '<%s %s>' % (cn, ' '.join(labels))
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441 return ret
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442
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443
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444
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445 # # #
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446 # # # Function builder
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447 # # #
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448
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449
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450 def wraps(func, injected=None, expected=None, **kw):
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451 """Decorator factory to apply update_wrapper() to a wrapper function.
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452
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453 Modeled after built-in :func:`functools.wraps`. Returns a decorator
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454 that invokes update_wrapper() with the decorated function as the wrapper
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455 argument and the arguments to wraps() as the remaining arguments.
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456 Default arguments are as for update_wrapper(). This is a convenience
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457 function to simplify applying partial() to update_wrapper().
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458
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459 Same example as in update_wrapper's doc but with wraps:
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460
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461 >>> from boltons.funcutils import wraps
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462 >>>
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463 >>> def print_return(func):
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464 ... @wraps(func)
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465 ... def wrapper(*args, **kwargs):
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466 ... ret = func(*args, **kwargs)
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467 ... print(ret)
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468 ... return ret
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469 ... return wrapper
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470 ...
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471 >>> @print_return
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472 ... def example():
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473 ... '''docstring'''
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474 ... return 'example return value'
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475 >>>
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476 >>> val = example()
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477 example return value
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478 >>> example.__name__
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479 'example'
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480 >>> example.__doc__
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481 'docstring'
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482 """
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483 return partial(update_wrapper, func=func, build_from=None,
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484 injected=injected, expected=expected, **kw)
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485
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486
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487 def update_wrapper(wrapper, func, injected=None, expected=None, build_from=None, **kw):
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488 """Modeled after the built-in :func:`functools.update_wrapper`,
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489 this function is used to make your wrapper function reflect the
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490 wrapped function's:
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491
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492 * Name
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493 * Documentation
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494 * Module
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495 * Signature
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496
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497 The built-in :func:`functools.update_wrapper` copies the first three, but
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498 does not copy the signature. This version of ``update_wrapper`` can copy
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499 the inner function's signature exactly, allowing seamless usage
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500 and :mod:`introspection <inspect>`. Usage is identical to the
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501 built-in version::
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502
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503 >>> from boltons.funcutils import update_wrapper
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504 >>>
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505 >>> def print_return(func):
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506 ... def wrapper(*args, **kwargs):
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507 ... ret = func(*args, **kwargs)
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parents:
diff changeset
508 ... print(ret)
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parents:
diff changeset
509 ... return ret
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parents:
diff changeset
510 ... return update_wrapper(wrapper, func)
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shellac
parents:
diff changeset
511 ...
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shellac
parents:
diff changeset
512 >>> @print_return
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shellac
parents:
diff changeset
513 ... def example():
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
514 ... '''docstring'''
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shellac
parents:
diff changeset
515 ... return 'example return value'
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shellac
parents:
diff changeset
516 >>>
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shellac
parents:
diff changeset
517 >>> val = example()
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shellac
parents:
diff changeset
518 example return value
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shellac
parents:
diff changeset
519 >>> example.__name__
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shellac
parents:
diff changeset
520 'example'
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shellac
parents:
diff changeset
521 >>> example.__doc__
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
522 'docstring'
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shellac
parents:
diff changeset
523
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
524 In addition, the boltons version of update_wrapper supports
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
525 modifying the outer signature. By passing a list of
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
526 *injected* argument names, those arguments will be removed from
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
527 the outer wrapper's signature, allowing your decorator to provide
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
528 arguments that aren't passed in.
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shellac
parents:
diff changeset
529
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shellac
parents:
diff changeset
530 Args:
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parents:
diff changeset
531
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parents:
diff changeset
532 wrapper (function) : The callable to which the attributes of
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shellac
parents:
diff changeset
533 *func* are to be copied.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
534 func (function): The callable whose attributes are to be copied.
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shellac
parents:
diff changeset
535 injected (list): An optional list of argument names which
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
536 should not appear in the new wrapper's signature.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
537 expected (list): An optional list of argument names (or (name,
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
538 default) pairs) representing new arguments introduced by
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
539 the wrapper (the opposite of *injected*). See
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
540 :meth:`FunctionBuilder.add_arg()` for more details.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
541 build_from (function): The callable from which the new wrapper
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
542 is built. Defaults to *func*, unless *wrapper* is partial object
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
543 built from *func*, in which case it defaults to *wrapper*.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
544 Useful in some specific cases where *wrapper* and *func* have the
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
545 same arguments but differ on which are keyword-only and positional-only.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
546 update_dict (bool): Whether to copy other, non-standard
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
547 attributes of *func* over to the wrapper. Defaults to True.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
548 inject_to_varkw (bool): Ignore missing arguments when a
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
549 ``**kwargs``-type catch-all is present. Defaults to True.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
550 hide_wrapped (bool): Remove reference to the wrapped function(s)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
551 in the updated function.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
552
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shellac
parents:
diff changeset
553 In opposition to the built-in :func:`functools.update_wrapper` bolton's
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
554 version returns a copy of the function and does not modifiy anything in place.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
555 For more in-depth wrapping of functions, see the
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
556 :class:`FunctionBuilder` type, on which update_wrapper was built.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
557 """
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
558 if injected is None:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
559 injected = []
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff changeset
560 elif isinstance(injected, basestring):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
561 injected = [injected]
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
562 else:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
563 injected = list(injected)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
564
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
565 expected_items = _parse_wraps_expected(expected)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
566
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shellac
parents:
diff changeset
567 if isinstance(func, (classmethod, staticmethod)):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
568 raise TypeError('wraps does not support wrapping classmethods and'
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
569 ' staticmethods, change the order of wrapping to'
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
570 ' wrap the underlying function: %r'
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
571 % (getattr(func, '__func__', None),))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
572
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
573 update_dict = kw.pop('update_dict', True)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
574 inject_to_varkw = kw.pop('inject_to_varkw', True)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
575 hide_wrapped = kw.pop('hide_wrapped', False)
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shellac
parents:
diff changeset
576 if kw:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
577 raise TypeError('unexpected kwargs: %r' % kw.keys())
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
578
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
579 if isinstance(wrapper, functools.partial) and func is wrapper.func:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
580 build_from = build_from or wrapper
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
581
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
582 fb = FunctionBuilder.from_func(build_from or func)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
583
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
584 for arg in injected:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
585 try:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
586 fb.remove_arg(arg)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
587 except MissingArgument:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
588 if inject_to_varkw and fb.varkw is not None:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
589 continue # keyword arg will be caught by the varkw
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
590 raise
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
591
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
592 for arg, default in expected_items:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
593 fb.add_arg(arg, default) # may raise ExistingArgument
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
594
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
595 if fb.is_async:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
596 fb.body = 'return await _call(%s)' % fb.get_invocation_str()
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
597 else:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
598 fb.body = 'return _call(%s)' % fb.get_invocation_str()
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
599
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
600 execdict = dict(_call=wrapper, _func=func)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
601 fully_wrapped = fb.get_func(execdict, with_dict=update_dict)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
602
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
603 if hide_wrapped and hasattr(fully_wrapped, '__wrapped__'):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
604 del fully_wrapped.__dict__['__wrapped__']
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
605 elif not hide_wrapped:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
606 fully_wrapped.__wrapped__ = func # ref to the original function (#115)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
607
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
608 return fully_wrapped
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
609
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
610
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
611 def _parse_wraps_expected(expected):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
612 # expected takes a pretty powerful argument, it's processed
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
613 # here. admittedly this would be less trouble if I relied on
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
614 # OrderedDict (there's an impl of that in the commit history if
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
615 # you look
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
616 if expected is None:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
617 expected = []
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
618 elif isinstance(expected, basestring):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
619 expected = [(expected, NO_DEFAULT)]
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
620
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
621 expected_items = []
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
622 try:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
623 expected_iter = iter(expected)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
624 except TypeError as e:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
625 raise ValueError('"expected" takes string name, sequence of string names,'
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
626 ' iterable of (name, default) pairs, or a mapping of '
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
627 ' {name: default}, not %r (got: %r)' % (expected, e))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
628 for argname in expected_iter:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
629 if isinstance(argname, basestring):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
630 # dict keys and bare strings
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
631 try:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
632 default = expected[argname]
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
633 except TypeError:
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634 default = NO_DEFAULT
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635 else:
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636 # pairs
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637 try:
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638 argname, default = argname
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639 except (TypeError, ValueError):
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640 raise ValueError('"expected" takes string name, sequence of string names,'
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641 ' iterable of (name, default) pairs, or a mapping of '
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642 ' {name: default}, not %r')
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643 if not isinstance(argname, basestring):
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644 raise ValueError('all "expected" argnames must be strings, not %r' % (argname,))
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645
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646 expected_items.append((argname, default))
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647
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648 return expected_items
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649
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650
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651 class FunctionBuilder(object):
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652 """The FunctionBuilder type provides an interface for programmatically
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653 creating new functions, either based on existing functions or from
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654 scratch.
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655
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656 Values are passed in at construction or set as attributes on the
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657 instance. For creating a new function based of an existing one,
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658 see the :meth:`~FunctionBuilder.from_func` classmethod. At any
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659 point, :meth:`~FunctionBuilder.get_func` can be called to get a
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660 newly compiled function, based on the values configured.
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661
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662 >>> fb = FunctionBuilder('return_five', doc='returns the integer 5',
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663 ... body='return 5')
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664 >>> f = fb.get_func()
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665 >>> f()
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666 5
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667 >>> fb.varkw = 'kw'
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668 >>> f_kw = fb.get_func()
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669 >>> f_kw(ignored_arg='ignored_val')
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670 5
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671
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672 Note that function signatures themselves changed quite a bit in
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673 Python 3, so several arguments are only applicable to
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674 FunctionBuilder in Python 3. Except for *name*, all arguments to
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675 the constructor are keyword arguments.
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676
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677 Args:
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678 name (str): Name of the function.
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679 doc (str): `Docstring`_ for the function, defaults to empty.
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680 module (str): Name of the module from which this function was
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681 imported. Defaults to None.
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682 body (str): String version of the code representing the body
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683 of the function. Defaults to ``'pass'``, which will result
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684 in a function which does nothing and returns ``None``.
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685 args (list): List of argument names, defaults to empty list,
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686 denoting no arguments.
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687 varargs (str): Name of the catch-all variable for positional
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688 arguments. E.g., "args" if the resultant function is to have
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689 ``*args`` in the signature. Defaults to None.
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690 varkw (str): Name of the catch-all variable for keyword
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691 arguments. E.g., "kwargs" if the resultant function is to have
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692 ``**kwargs`` in the signature. Defaults to None.
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693 defaults (tuple): A tuple containing default argument values for
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694 those arguments that have defaults.
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695 kwonlyargs (list): Argument names which are only valid as
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diff changeset
696 keyword arguments. **Python 3 only.**
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diff changeset
697 kwonlydefaults (dict): A mapping, same as normal *defaults*,
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698 but only for the *kwonlyargs*. **Python 3 only.**
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diff changeset
699 annotations (dict): Mapping of type hints and so
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700 forth. **Python 3 only.**
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701 filename (str): The filename that will appear in
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diff changeset
702 tracebacks. Defaults to "boltons.funcutils.FunctionBuilder".
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diff changeset
703 indent (int): Number of spaces with which to indent the
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diff changeset
704 function *body*. Values less than 1 will result in an error.
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705 dict (dict): Any other attributes which should be added to the
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diff changeset
706 functions compiled with this FunctionBuilder.
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diff changeset
707
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diff changeset
708 All of these arguments are also made available as attributes which
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diff changeset
709 can be mutated as necessary.
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diff changeset
710
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diff changeset
711 .. _Docstring: https://en.wikipedia.org/wiki/Docstring#Python
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diff changeset
712
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parents:
diff changeset
713 """
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diff changeset
714
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diff changeset
715 if _IS_PY2:
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diff changeset
716 _argspec_defaults = {'args': list,
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diff changeset
717 'varargs': lambda: None,
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diff changeset
718 'varkw': lambda: None,
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diff changeset
719 'defaults': lambda: None}
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diff changeset
720
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diff changeset
721 @classmethod
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diff changeset
722 def _argspec_to_dict(cls, f):
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diff changeset
723 args, varargs, varkw, defaults = inspect.getargspec(f)
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diff changeset
724 return {'args': args,
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diff changeset
725 'varargs': varargs,
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diff changeset
726 'varkw': varkw,
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diff changeset
727 'defaults': defaults}
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diff changeset
728
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729 else:
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diff changeset
730 _argspec_defaults = {'args': list,
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diff changeset
731 'varargs': lambda: None,
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diff changeset
732 'varkw': lambda: None,
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diff changeset
733 'defaults': lambda: None,
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diff changeset
734 'kwonlyargs': list,
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diff changeset
735 'kwonlydefaults': dict,
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diff changeset
736 'annotations': dict}
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737
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738 @classmethod
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diff changeset
739 def _argspec_to_dict(cls, f):
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diff changeset
740 argspec = inspect.getfullargspec(f)
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741 return dict((attr, getattr(argspec, attr))
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742 for attr in cls._argspec_defaults)
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diff changeset
743
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744 _defaults = {'doc': str,
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745 'dict': dict,
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746 'is_async': lambda: False,
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diff changeset
747 'module': lambda: None,
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748 'body': lambda: 'pass',
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749 'indent': lambda: 4,
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750 "annotations": dict,
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751 'filename': lambda: 'boltons.funcutils.FunctionBuilder'}
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752
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753 _defaults.update(_argspec_defaults)
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754
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755 _compile_count = itertools.count()
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756
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757 def __init__(self, name, **kw):
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758 self.name = name
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759 for a, default_factory in self._defaults.items():
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760 val = kw.pop(a, None)
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761 if val is None:
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diff changeset
762 val = default_factory()
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763 setattr(self, a, val)
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764
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765 if kw:
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parents:
diff changeset
766 raise TypeError('unexpected kwargs: %r' % kw.keys())
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parents:
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767 return
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768
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769 # def get_argspec(self): # TODO
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770
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771 if _IS_PY2:
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772 def get_sig_str(self, with_annotations=True):
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diff changeset
773 """Return function signature as a string.
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diff changeset
774
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diff changeset
775 with_annotations is ignored on Python 2. On Python 3 signature
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parents:
diff changeset
776 will omit annotations if it is set to False.
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777 """
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diff changeset
778 return inspect_formatargspec(self.args, self.varargs,
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diff changeset
779 self.varkw, [])
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diff changeset
780
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781 def get_invocation_str(self):
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diff changeset
782 return inspect_formatargspec(self.args, self.varargs,
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783 self.varkw, [])[1:-1]
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784 else:
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785 def get_sig_str(self, with_annotations=True):
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diff changeset
786 """Return function signature as a string.
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diff changeset
787
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diff changeset
788 with_annotations is ignored on Python 2. On Python 3 signature
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parents:
diff changeset
789 will omit annotations if it is set to False.
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parents:
diff changeset
790 """
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parents:
diff changeset
791 if with_annotations:
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parents:
diff changeset
792 annotations = self.annotations
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793 else:
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parents:
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794 annotations = {}
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diff changeset
795
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diff changeset
796 return inspect_formatargspec(self.args,
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parents:
diff changeset
797 self.varargs,
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parents:
diff changeset
798 self.varkw,
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diff changeset
799 [],
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diff changeset
800 self.kwonlyargs,
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diff changeset
801 {},
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diff changeset
802 annotations)
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diff changeset
803
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diff changeset
804 _KWONLY_MARKER = re.compile(r"""
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parents:
diff changeset
805 \* # a star
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parents:
diff changeset
806 \s* # followed by any amount of whitespace
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parents:
diff changeset
807 , # followed by a comma
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parents:
diff changeset
808 \s* # followed by any amount of whitespace
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parents:
diff changeset
809 """, re.VERBOSE)
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diff changeset
810
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parents:
diff changeset
811 def get_invocation_str(self):
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parents:
diff changeset
812 kwonly_pairs = None
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parents:
diff changeset
813 formatters = {}
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diff changeset
814 if self.kwonlyargs:
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diff changeset
815 kwonly_pairs = dict((arg, arg)
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diff changeset
816 for arg in self.kwonlyargs)
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diff changeset
817 formatters['formatvalue'] = lambda value: '=' + value
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diff changeset
818
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diff changeset
819 sig = inspect_formatargspec(self.args,
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parents:
diff changeset
820 self.varargs,
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diff changeset
821 self.varkw,
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diff changeset
822 [],
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diff changeset
823 kwonly_pairs,
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diff changeset
824 kwonly_pairs,
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diff changeset
825 {},
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parents:
diff changeset
826 **formatters)
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diff changeset
827 sig = self._KWONLY_MARKER.sub('', sig)
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parents:
diff changeset
828 return sig[1:-1]
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diff changeset
829
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diff changeset
830 @classmethod
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parents:
diff changeset
831 def from_func(cls, func):
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parents:
diff changeset
832 """Create a new FunctionBuilder instance based on an existing
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parents:
diff changeset
833 function. The original function will not be stored or
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parents:
diff changeset
834 modified.
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parents:
diff changeset
835 """
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parents:
diff changeset
836 # TODO: copy_body? gonna need a good signature regex.
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parents:
diff changeset
837 # TODO: might worry about __closure__?
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838 if not callable(func):
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diff changeset
839 raise TypeError('expected callable object, not %r' % (func,))
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diff changeset
840
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diff changeset
841 if isinstance(func, functools.partial):
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parents:
diff changeset
842 if _IS_PY2:
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parents:
diff changeset
843 raise ValueError('Cannot build FunctionBuilder instances from partials in python 2.')
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parents:
diff changeset
844 kwargs = {'name': func.func.__name__,
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parents:
diff changeset
845 'doc': func.func.__doc__,
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parents:
diff changeset
846 'module': getattr(func.func, '__module__', None), # e.g., method_descriptor
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parents:
diff changeset
847 'annotations': getattr(func.func, "__annotations__", {}),
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parents:
diff changeset
848 'dict': getattr(func.func, '__dict__', {})}
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parents:
diff changeset
849 else:
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diff changeset
850 kwargs = {'name': func.__name__,
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parents:
diff changeset
851 'doc': func.__doc__,
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parents:
diff changeset
852 'module': getattr(func, '__module__', None), # e.g., method_descriptor
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parents:
diff changeset
853 'annotations': getattr(func, "__annotations__", {}),
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parents:
diff changeset
854 'dict': getattr(func, '__dict__', {})}
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parents:
diff changeset
855
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parents:
diff changeset
856 kwargs.update(cls._argspec_to_dict(func))
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diff changeset
857
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diff changeset
858 if _inspect_iscoroutinefunction(func):
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diff changeset
859 kwargs['is_async'] = True
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diff changeset
860
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861 return cls(**kwargs)
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862
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diff changeset
863 def get_func(self, execdict=None, add_source=True, with_dict=True):
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parents:
diff changeset
864 """Compile and return a new function based on the current values of
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff changeset
865 the FunctionBuilder.
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parents:
diff changeset
866
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parents:
diff changeset
867 Args:
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parents:
diff changeset
868 execdict (dict): The dictionary representing the scope in
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parents:
diff changeset
869 which the compilation should take place. Defaults to an empty
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diff changeset
870 dict.
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diff changeset
871 add_source (bool): Whether to add the source used to a
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diff changeset
872 special ``__source__`` attribute on the resulting
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873 function. Defaults to True.
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874 with_dict (bool): Add any custom attributes, if
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
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parents:
diff changeset
875 applicable. Defaults to True.
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876
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diff changeset
877 To see an example of usage, see the implementation of
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parents:
diff changeset
878 :func:`~boltons.funcutils.wraps`.
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parents:
diff changeset
879 """
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diff changeset
880 execdict = execdict or {}
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diff changeset
881 body = self.body or self._default_body
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diff changeset
882
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diff changeset
883 tmpl = 'def {name}{sig_str}:'
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diff changeset
884 tmpl += '\n{body}'
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885
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886 if self.is_async:
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887 tmpl = 'async ' + tmpl
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diff changeset
888
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
889 body = _indent(self.body, ' ' * self.indent)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
890
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
891 name = self.name.replace('<', '_').replace('>', '_') # lambdas
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
892 src = tmpl.format(name=name, sig_str=self.get_sig_str(with_annotations=False),
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
893 doc=self.doc, body=body)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
894 self._compile(src, execdict)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
895 func = execdict[name]
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
896
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
897 func.__name__ = self.name
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
898 func.__doc__ = self.doc
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
899 func.__defaults__ = self.defaults
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
900 if not _IS_PY2:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
901 func.__kwdefaults__ = self.kwonlydefaults
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
902 func.__annotations__ = self.annotations
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
903
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
904 if with_dict:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
905 func.__dict__.update(self.dict)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
906 func.__module__ = self.module
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
907 # TODO: caller module fallback?
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
908
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
909 if add_source:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
910 func.__source__ = src
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
911
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
912 return func
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
913
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
914 def get_defaults_dict(self):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
915 """Get a dictionary of function arguments with defaults and the
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
916 respective values.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
917 """
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
918 ret = dict(reversed(list(zip(reversed(self.args),
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
919 reversed(self.defaults or [])))))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
920 kwonlydefaults = getattr(self, 'kwonlydefaults', None)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
921 if kwonlydefaults:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
922 ret.update(kwonlydefaults)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
923 return ret
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
924
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
925 def get_arg_names(self, only_required=False):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
926 arg_names = tuple(self.args) + tuple(getattr(self, 'kwonlyargs', ()))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
927 if only_required:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
928 defaults_dict = self.get_defaults_dict()
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
929 arg_names = tuple([an for an in arg_names if an not in defaults_dict])
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
930 return arg_names
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
931
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
932 if _IS_PY2:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
933 def add_arg(self, arg_name, default=NO_DEFAULT):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
934 "Add an argument with optional *default* (defaults to ``funcutils.NO_DEFAULT``)."
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
935 if arg_name in self.args:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
936 raise ExistingArgument('arg %r already in func %s arg list' % (arg_name, self.name))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
937 self.args.append(arg_name)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
938 if default is not NO_DEFAULT:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
939 self.defaults = (self.defaults or ()) + (default,)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
940 return
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
941 else:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
942 def add_arg(self, arg_name, default=NO_DEFAULT, kwonly=False):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
943 """Add an argument with optional *default* (defaults to
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
944 ``funcutils.NO_DEFAULT``). Pass *kwonly=True* to add a
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
945 keyword-only argument
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
946 """
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
947 if arg_name in self.args:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
948 raise ExistingArgument('arg %r already in func %s arg list' % (arg_name, self.name))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
949 if arg_name in self.kwonlyargs:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
950 raise ExistingArgument('arg %r already in func %s kwonly arg list' % (arg_name, self.name))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
951 if not kwonly:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
952 self.args.append(arg_name)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
953 if default is not NO_DEFAULT:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
954 self.defaults = (self.defaults or ()) + (default,)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
955 else:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
956 self.kwonlyargs.append(arg_name)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
957 if default is not NO_DEFAULT:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
958 self.kwonlydefaults[arg_name] = default
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
959 return
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
960
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
961 def remove_arg(self, arg_name):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
962 """Remove an argument from this FunctionBuilder's argument list. The
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
963 resulting function will have one less argument per call to
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
964 this function.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
965
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
966 Args:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
967 arg_name (str): The name of the argument to remove.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
968
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
969 Raises a :exc:`ValueError` if the argument is not present.
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
970
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
971 """
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
972 args = self.args
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
973 d_dict = self.get_defaults_dict()
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
974 try:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
975 args.remove(arg_name)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
976 except ValueError:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
977 try:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
978 self.kwonlyargs.remove(arg_name)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
979 except (AttributeError, ValueError):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
980 # py2, or py3 and missing from both
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
981 exc = MissingArgument('arg %r not found in %s argument list:'
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
982 ' %r' % (arg_name, self.name, args))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
983 exc.arg_name = arg_name
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
984 raise exc
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
985 else:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
986 self.kwonlydefaults.pop(arg_name, None)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
987 else:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
988 d_dict.pop(arg_name, None)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
989 self.defaults = tuple([d_dict[a] for a in args if a in d_dict])
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
990 return
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
991
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
992 def _compile(self, src, execdict):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
993
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
994 filename = ('<%s-%d>'
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
995 % (self.filename, next(self._compile_count),))
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
996 try:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
997 code = compile(src, filename, 'single')
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
998 exec(code, execdict)
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
999 except Exception:
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1000 raise
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1001 return execdict
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1002
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1003
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1004 class MissingArgument(ValueError):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1005 pass
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1006
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1007
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1008 class ExistingArgument(ValueError):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1009 pass
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1010
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1011
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1012 def _indent(text, margin, newline='\n', key=bool):
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
diff changeset
1013 "based on boltons.strutils.indent"
4f3585e2f14b "planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
shellac
parents:
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1014 indented_lines = [(margin + line if key(line) else line)
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1015 for line in text.splitlines()]
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1016 return newline.join(indented_lines)
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1017
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1018
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1019 try:
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1020 from functools import total_ordering # 2.7+
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1021 except ImportError:
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1022 # python 2.6
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1023 def total_ordering(cls):
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1024 """Class decorator that fills in missing comparators/ordering
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1025 methods. Backport of :func:`functools.total_ordering` to work
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1026 with Python 2.6.
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1027
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1028 Code from http://code.activestate.com/recipes/576685/
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1029 """
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1030 convert = {
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1031 '__lt__': [
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1032 ('__gt__',
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1033 lambda self, other: not (self < other or self == other)),
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1034 ('__le__',
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1035 lambda self, other: self < other or self == other),
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1036 ('__ge__',
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1037 lambda self, other: not self < other)],
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1038 '__le__': [
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1039 ('__ge__',
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1040 lambda self, other: not self <= other or self == other),
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1041 ('__lt__',
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1042 lambda self, other: self <= other and not self == other),
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1043 ('__gt__',
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1044 lambda self, other: not self <= other)],
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1045 '__gt__': [
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1046 ('__lt__',
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1047 lambda self, other: not (self > other or self == other)),
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1048 ('__ge__',
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1049 lambda self, other: self > other or self == other),
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1050 ('__le__',
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1051 lambda self, other: not self > other)],
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1052 '__ge__': [
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1053 ('__le__',
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1054 lambda self, other: (not self >= other) or self == other),
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1055 ('__gt__',
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1056 lambda self, other: self >= other and not self == other),
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1057 ('__lt__',
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1058 lambda self, other: not self >= other)]
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1059 }
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1060 roots = set(dir(cls)) & set(convert)
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1061 if not roots:
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1062 raise ValueError('must define at least one ordering operation:'
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1063 ' < > <= >=')
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1064 root = max(roots) # prefer __lt__ to __le__ to __gt__ to __ge__
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1065 for opname, opfunc in convert[root]:
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1066 if opname not in roots:
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1067 opfunc.__name__ = opname
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1068 opfunc.__doc__ = getattr(int, opname).__doc__
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1069 setattr(cls, opname, opfunc)
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1070 return cls
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1071
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1072 # end funcutils.py