迭代器yield

我认为生成器是迭代器中的一种,属个人看法.
for, while, range, iter, enumerate属于迭代器, xrange 属于生成器,还包括这种形式: [i for i in range(4) if i > 2]

>>> it = iter(range(4))>>> it.next()>>> it.next()0>>> it.next()1>>> it.next()2

带有 yield 的函数在 Python 中被称之为 generator（生成器）,分享一个小程序

# -*- coding: utf-8 -*-def para_list(data):    if isinstance(data, list):        for d in data:            para_list(d)    else:        yield dataif __name__ == '__main__':    all_data = list()    a_list = [1,2,[3,4], [[5,6, [7,8]]], 9]    for data in para_list(a_list):        all_data.append(data)    print all_data# [1, 2, 3, 4, 5, 6, 7, 8, 9]