python3 线程比进程的开销小

# -*- coding: utf-8 -*-
from threading import Thread


def func(name):
    print("子线程: %s" %name)


if __name__ == '__main__':
    t = Thread(target=func, args=("lily",))
    t.start()
    print("主线程")

# 子线程: lily
# 主线程

# -*- coding: utf-8 -*-
from multiprocessing import Process


def func(name):
    print("子进程: %s" %name)


if __name__ == '__main__':
    p = Process(target=func, args=("lily",))
    p.start()  # 这里需要资源开销比线程大,所以先打印主进程
    print("主进程")

# 主进程
# 子进程: lily

 

第二种开启线程的方法(自定义类,继承Thread类)

# -*- coding: utf-8 -*-
from threading import Thread


class MyThread(Thread):
    def run(self):  # 必须有的方法
        print("子线程: %s" % self.name)


if __name__ == '__main__':
    t = MyThread()
    t.start()
    print("子线程")


# 子线程: Thread-1
# 子线程