Python--day40--threading模块

 import time
 from threading import Thread

 class MyThread(Thread):
     def __init__(self,arg):
         super().__init__()
         self.arg = arg
     def run(self):
         time.sleep(1)
         print(self.arg)

 t = MyThread(10)
 t.start()

运行结果：

1，一个例子:

 import os
 import time
 from threading import Thread
 #多线程并发
 def func(a,b):
     global g
     g = 0
     n = a+b
     print(n,os.getpid())

 g = 100
 t_lst = []
 #i的值的范围是0--9
 for i in range(10):
     t = Thread(target=func,args=(i,5))
     t.start()
     t_lst.append(t)
 for t in t_lst:t.join()
 print(g)

运行结果：