utils.py 文件源码

def expects_func_args(*args):
    def _decorator_checker(dec):
        @functools.wraps(dec)
        def _decorator(f):
            base_f = safe_utils.get_wrapped_function(f)
            arg_names, a, kw, _default = inspect.getargspec(base_f)
            if a or kw or set(args) <= set(arg_names):
                # NOTE : We can't really tell if correct stuff will
                # be passed if it's a function with *args or **kwargs so
                # we still carry on and hope for the best
                return dec(f)
            else:
                raise TypeError("Decorated function %(f_name)s does not "
                                "have the arguments expected by the "
                                "decorator %(d_name)s" %
                                {'f_name': base_f.__name__,
                                 'd_name': dec.__name__})
        return _decorator
    return _decorator_checker