python进程与线程小结

传统方式是调用2个方法执行1个任务，方法按顺序依次执行

# -*- coding:utf-8 -*-
import threading
import time
def run(n):
    print('task',n)
    time.sleep(3)


if __name__ == '__main__':
    run('t1')
    run('t2')

多进程例子

2个进程同时并发执行1个任务

# -*- coding:utf-8 -*-
import threading
import time
def run(n):
    print('task',n)
    time.sleep(3)


if __name__ == '__main__':
    t1=threading.Thread(target=run,args=('t1',))
    t2=threading.Thread(target=run,args=('t2',))

    t1.start()
    t2.start()

自己写一个类继承继承threading.Thread

# -*- coding:utf-8 -*-
import threading
import time

class MyThread(threading.Thread):
    def __init__(self,n):
        super(MyThread,self).__init__()
        self.n=n

    #这里面默认就有一个run方法
    def run(self):
        print('runing task',self.n)


if __name__ == '__main__':
    #在主方法通过对象调用进程
    t1=MyThread('t1')
    t2=MyThread('t2')

    t1.run()
    t2.run()

使用for循环启动多个进程

# -*- coding:utf-8 -*-
import threading
import time
def run(n):
    print('task',n)
    time.sleep(3)


if __name__ == '__main__':
    for i in range(10):
        t=threading.Thread(target=run,args=('t-%s'%i,))
        t.start()