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38 lines
1.7 KiB
38 lines
1.7 KiB
3 years ago
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# The inspect.formatargspec() function was dropped in Python 3.11 but we need
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# need it for when constructing signature changing decorators based on result of
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# inspect.getargspec() or inspect.getfullargspec(). The code here implements
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# inspect.formatargspec() base on Parameter and Signature from inspect module,
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# which were added in Python 3.6. Thanks to Cyril Jouve for the implementation.
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try:
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from inspect import Parameter, Signature
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except ImportError:
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from inspect import formatargspec
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else:
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def formatargspec(args, varargs=None, varkw=None, defaults=None,
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kwonlyargs=(), kwonlydefaults={}, annotations={}):
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if kwonlydefaults is None:
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kwonlydefaults = {}
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ndefaults = len(defaults) if defaults else 0
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parameters = [
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Parameter(
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arg,
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Parameter.POSITIONAL_OR_KEYWORD,
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default=defaults[i] if i >= 0 else Parameter.empty,
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annotation=annotations.get(arg, Parameter.empty),
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) for i, arg in enumerate(args, ndefaults - len(args))
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]
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if varargs:
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parameters.append(Parameter(varargs, Parameter.VAR_POSITIONAL))
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parameters.extend(
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Parameter(
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kwonlyarg,
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Parameter.KEYWORD_ONLY,
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default=kwonlydefaults.get(kwonlyarg, Parameter.empty),
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annotation=annotations.get(kwonlyarg, Parameter.empty),
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) for kwonlyarg in kwonlyargs
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)
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if varkw:
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parameters.append(Parameter(varkw, Parameter.VAR_KEYWORD))
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return_annotation = annotations.get('return', Signature.empty)
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return str(Signature(parameters, return_annotation=return_annotation))
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