python 协程

1.协程定义

不开辟新的线程的基础上，实现多个任务，是个特殊的生成器。一秒钟能切换上百次。

2.原始版协程

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import time   #1.work1 生成器 def work1():     while True:         print("executing work1......")         yield         time.sleep(0.5)   #2.work2 生成器 def work2():     while True:         print("executing work2......")         yield         time.sleep(0.5)   #3.获取生成器 #4.协程运行 if __name__ == '__main__':     w1=work1()     w2=work2()     while True:         next(w1)         next(w2)   执行结果 executing work1...... executing work2...... executing work1...... executing work2...... executing work1...... executing work2......