python创建线程示例

import threading
from time import sleep

def test_func(id):
    for i in range(0,5):
        sleep(1)
        print('thread %d is running %d' % (id,i))

threads = []
for i in range(0,3):
    t = threading.thread(target=test_func, args=(i,))
    threads.append(t)

for t in threads:
    t.start()

for t in threads:
    t.join()

从输出结果可以看到，3个线程是交替的执行的