import threading
import time

# 线程类
class ThreadGo(threading.Thread):
 def __init__(self, name="", *args, **kargs):
 threading.Thread.__init__(self) # 执行父类构造函数
 self.args = args
 self.kargs = kargs
 self.name = name
 self.go = True

 def terminate(self):
 self.go = False

 #重新实现 run 方法
 def run(self):
 while self.go:
 print("go")
 time.sleep(.5)

# 创建线程
th = ThreadGo()

# 启动线程
th.start()

time.sleep(5)
th.terminate()
th.join()
print("exit...")