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#!/usr/bin/env python

# -*- encoding: utf-8 -*-

"""

Topic: 协程与微线程

Desc :

"""

from collections import deque

__author__ = 'Xiong Neng'

def foo():

for n in range(5):

print('I\'m foo %d' % n)

yield

def bar():

for n in range(10):

print("I'm bar %d" % n)

yield

def spam():

for n in range(7):

print("I'm spam %d" % n)

def demo():

taskqueue = deque()

taskqueue.append(foo())

taskqueue.append(bar())

taskqueue.append(spam())

while taskqueue:

task = taskqueue.pop()

try:

task.__next__()

taskqueue.appendleft(task)

except (StopIteration, AttributeError):

pass

if __name__ == '__main__':

demo()

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