python-课堂-5.30

#创建3个线程，每个线程包括2个子线程
import threading
import time
def process():
    for i in range(2):
        time.sleep(2)
    print("线程的名称：{}".format(threading.currentThread().name))#threading.currentThread()获取当前线程

if __name__ == "__main__":
    print("---主线程开始---")
    threads=[threading.Thread(target=process) for i in range(3)]
    for t in threads:
        t.start()#等待线程启动
    for t in threads:
        t.join()
    print("---主线程结束---")

#使用start_new_thread()产生新线程
import _thread
import time
#为线程创建一个函数，实现输出当前的时间
def print_time(threadname,delay):
    count=0
    print(time.ctime())
    while count < 5:
        count += 1
        time.sleep(delay)
        print(time.ctime())
try:
    _thread.start_new_thread(print_time,("线程1",2))#第一个参数为函数名，第二个参数为函数的参数，以元组的形式传入
    _thread.start_new_thread(print_time,('线程2',4))
except:
    print("Error:无法启动线程")
while 1:
    pass