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# The Universal Permissive License (UPL), Version 1.0
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def __signature__(self):
    import inspect
    text_sig = self.__text_signature__
    text_sig = text_sig[1:-1] # remove parens
    paramnames = [p.strip() for p in text_sig.split(",")]
    i = 0
    kind = inspect.Parameter.POSITIONAL_ONLY
    parameters = []
    while i < len(paramnames):
        p = paramnames[i]
        if p.startswith("$"):
            pass
        elif p == "/":
            kind = inspect.Parameter.POSITIONAL_OR_KEYWORD
        elif p.startswith("**"):
            parameters.append(inspect.Parameter(p, inspect.Parameter.VAR_KEYWORD))
        elif p.startswith("*"):
            kind = inspect.Parameter.KEYWORD_ONLY
            if p != "*":
                parameters.append(inspect.Parameter(p, inspect.Parameter.VAR_POSITIONAL))
        elif p:
            if "=" in p:
                kind = inspect.Parameter.POSITIONAL_OR_KEYWORD
            parameters.append(inspect.Parameter(p, kind))
        i += 1

    return inspect.Signature(parameters=parameters)


# attach to builtin methods and builtin functions
type(list.append).__signature__ = property(__signature__)
type(abs).__signature__ = property(__signature__)