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