https://nychent.github.io/articles/2016-05/about-generator.cn

这个深刻

谈起Generator, 与之相关的的有 - {list, set, tuple, dict} comprehension and container - iterable - iterator - generator fuction and iterator - generator expression

#!/usr/bin/env python# -*- coding: utf-8 -*-# Spawn a Process: Chapter 3: Process Based Parallelismimport multiprocessingimport timefrom collections import Iterable, Iteratorimport disfrom itertools import islicex = [1, 2, 3]for i in x:    print iy = iter(x)z = iter(x)print dir(x)print dir(y)print next(y)print next(y)print next(z)print next(z)print type(x)print isinstance(x, Iterable)print isinstance(x, Iterator)print type(y)print isinstance(y, Iterable)print isinstance(y, Iterator)class seq(object):    def __init__(self):        self.gap = 2        self.curr = 1    def __iter__(self):        return self    def next(self):        value = self.curr        self.curr += self.gap        return valuef = seq()print list(islice(f, 0, 10))def seq():    gap, curr = 2, 1    while True:        yield curr        curr += gapf = seq()print list(islice(f, 0, 10))def fib():    a, b = 0, 1    while True:        yield b        a, b = b, a + bprint fibf = fib()print fprint(next(f), next(f), next(f), next(f), next(f))def gen():    while True:        value = yield        print(value)g = gen()next(g)g.send("hahahha")next(g)