mport _thread as thread
import time
def loop1(in1):
  print("Start loop 1 at:", time.ctime())
print("我是参数", in1)
time.sleep(4)
print("End loop 1 at:", time.ctime())
​
def loop2(in1, in2):
  print("Start loop 2 at:", time.ctime())
print("我是参数", in1, "和参数 ", in2)
time.sleep(4)
print("End loop 2 at:", time.ctime())
​
import threading
def main1():
  print("Starting at:", time.ctime())
t1 = threading.Thread(target = loop1, args = ('', ))
t1.setName("THR_1")# 给线程重命名
t1.start()
​
t2 = threading.Thread(target = loop2, args = ('', ''))
t2.setName("THR_2")
t2.setDaemon(True)# 主线程运行完了就完了， 不用等线程2
t2.start()
​
time.sleep(3)# 三秒后两个子线程仍然在运行着， 因为他们里面有一个四秒在停着
for thr in threading.enumerate(): #返回的是正在运行的子线程的列表
print("正在运行的子线程名为：{0}".format(thr.getName()))# 读取了该线程的名字
​
print("正在运行的子线程数量为：{0}".format(threading.activeCount()))# 打印出了线程的数量， 包括主线程和两个子线程一共3个线程
t1.join()# 等线程1运行完了再接着向下运行
print("ALL done at :", time.ctime())
​
if __name__ == "__main__":
  main1()

class MyThread(threading.Thread): #定义一个Thread的子类
def __init__(self, args): #重写__init__函数， 其中参数为self和新引入的参数
super(MyThread, self).__init__()# 固定格式， 继承父类的__init__函数
self.args = args
​
def run(self):
  time.sleep(1)
print("The args for this class is {0}".format(self.args))
​
for i in range(5):
  t = MyThread(i)
t.start()
t.join()