recipe-577064.py 文件源码

def overloaded(func):
    @wraps(func)
    def overloaded_func(*args, **kwargs):
        for f in overloaded_func.overloads:
            try:
                return f(*args, **kwargs)
            except TypeError:
                pass
        else:
            # it will be nice if the error message prints a list of 
            # possible signatures here
            raise TypeError("No compatible signatures")

    def overload_with(func):
        overloaded_func.overloads.append(func)
        return overloaded_func

    overloaded_func.overloads = [func]
    overloaded_func.overload_with = overload_with
    return overloaded_func


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