書いた本人に必要性が分からないシリーズ

import sys
class OverloadMethod(object):
def __init__(self):
self.functions = []
def __call__(self, *args, **kwargs):
for function in self.functions:
if len(args) == function.func_code.co_argcount:
return function(*args)
raise ValueError
def overload(function):
obj = sys._getframe(1).f_globals.get(function.__name__)
if obj is None:
obj = OverloadMethod()
obj.functions.append(function)
return obj
if __name__ == '__main__':
class Foo(object):
@overload
def foo(a):
print a
@overload
def foo(a, b):
print a + b
foo(1)
foo(1, 2)
Foo().foo(1)
Foo().foo(1, 2)