【Python】开启线程的方法

# 什么是线程:
        线程是真正的执行工作单位

# 线程与进程的区别
    1. 开进程的开销远大于开线程(生成全新的地址空间,子进程的全局变量与主进程不共用)
    2. 同一进程内的多个线程共享进程的地址空间
    3. 仅一个pid  ,线程不能get ppid

# 方法一
import time
import random
from threading import Thread


def hook(name):
    print('%s hooking' % name)
    time.sleep(random.randrange(1, 5))
    print('%s hooking finished' % name)


if __name__ == '__main__':
    t1 = Thread(target=hook, kwargs={'name': 'egon'})
    t1.start()
    print('main thread')

# 方法二
import time
import random
from threading import Thread


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

    def run(self):
        name = self.name
        print('%s hooking' % name)
        time.sleep(random.randrange(1, 5))
        print('%s hooking finished' % name)


if __name__ == '__main__':
    t1 = MyThread('egon')
    t1.start()