python的bind函数

# -*- coding:utf-8 -*-

class Functor(object):
def __init__(self, func, index=0, *args, **kwargs):
self._Func = func
self._Index = index
self._Args = args
self._Kwargs = kwargs

def __call__(self, *args, **kwargs):
args = args[:self._Index] + self._Args + args[self._Index:]
kwargs = kwargs.copy()
kwargs.update(self._Kwargs)
return self._Func(*args, **kwargs)


def bind(func, index=0, *args, **kwargs):
return Functor(func, index, *args, **kwargs)