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...")