# -*- coding: utf-8 -*- from collections import Iterable def my_reduce(func, seq, init=None): ``` 参考官网例子('https://docs.python.org/3.5/library/functools.html?highlight=reduce#functools.reduce') ``` if not isinstance(seq, Iterable): raise 'The seq must be iterbale' it = iter(seq) if init is None: value = next(it) else: value = init for i in it: value = func(value, i) return value