线程

线程：指代码的运行过程

进程：指的是一个资源空间 (包含线程)

　　(1) 同一进程下，所有线程共享该进程下的资源

　　(2) 创建线程要小于进程

 

开启线程的方式

方式1：
from threading import Thread
import time

def task():
    print('xx')
    time.sleep(1)
    print('zz')

if __name__== '__main__':
    t = Thread(target=task,)
    t.start()
    print('主')

from threading import Thread
import time

class auth(Thread):
    def run(self):
        print('xx %s' %self.name)
        time.sleep(1)
        print('zz')

if __name__== '__main__':
    t = auth()
    t.start()
    print('主...')

 线程互斥锁

from threading import Thread,Lock
import time
mutex = Lock()
n = 100
def task():
    global n
    mutex.acquire()
    test = n
    time.sleep(0.1)
    n = test -1
    mutex.release()


if __name__=='__main__':
    t_i = []
    for i in range(100):
        t = Thread(target=task,)
        t_i.append(t)
        t.start()
        # t.join()
    for t in t_i:
        t.join()
    print(n)