#!/usr/bin/python3

# Python decorator oddity with functools.wraps

import functools

def some_decorator(f):
    @functools.wraps(f)
    def THIS_SHOULD_NEVER_BE_SEEN(x):
        return f(x + 1)
    return THIS_SHOULD_NEVER_BE_SEEN

@some_decorator
def some_function(x):
    return x ** 2

try:
    some_function(5, "bogus extra argument")
except TypeError as e:
    assert not 'THIS_SHOULD_NEVER_BE_SEEN' in str(e), str(e)
    # CPython 3.3.1 uses the old __name__ in the error message
    # TypeError: THIS_SHOULD_NEVER_BE_SEEN() takes 1 positional argument but 2 were given