misc.py 文件源码

def _get_argspec(func):
    """Returns an inspect.ArgSpec instance given a function object.

    We prefer this implementation rather than the inspect module's getargspec
    since the latter has a strict check that the passed function is an instance
    of FunctionType. Cython functions do not pass this check, but they do implement
    the `func_code` and `func_defaults` attributes that we need to produce an Argspec.

    This implementation re-uses much of inspect.getargspec but removes the strict
    check allowing interface failures to be raised as AttributeError.

    See Also:
        https://github.com/python/cpython/blob/2.7/Lib/inspect.py
    """
    if inspect.ismethod(func):
        func = func.im_func

    args, varargs, varkw = inspect.getargs(func.func_code)
    return inspect.ArgSpec(args, varargs, varkw, func.func_defaults)