python_多线程

#实例
def down_load():
    time.sleep(5)
    print(‘运行完了‘)

def movie():
    time.sleep(1)
    print(‘movie‘)

start_time = time.time()
#方法1：
thread_list = []
for i in range(5):
    t = threading.Thread(target=movie)#启动线程
    t.start() #开始线程
    thread_list.append(t)
for thread in thread_list:
    thread.join()  #主线程等待子线程结束

#方法2：
for i in range(5):
    t = threading.Thread(target=movie)#启动线程
    t.start()  #开始线程
while threading.activeCount() !=1:
    pass

print(threading.activeCount())  #查看当前线程数
print(threading.current_thread())  #查看当前线程

end_time = time.time()
print(end_time - start_time)