运行结果出现错误，不知道是不是代码出现问题。

import time
import datetime
import _thread

date_time_format = "%H:%M:%S"


def get_time_str():
    now = datetime.datetime.now()
    return datetime.datetime.strptime(now, date_time_format)


def thread_function(thread_id):
    print("Thread %d\t start at %s" % (thread_id, get_time_str()))
    print("Thread %d\t sleeeping" % thread_id)
    time.sleep(4)
    print("Thread %d\t finish at %s" % (thread_id, get_time_str()))


def main():
    print("Main thread start at %s" % get_time_str())
    for i in range(5):
        _thread.start_new_thread(thread_function, (i,))
        time.sleep(1)
    time.sleep(6)
    print("Main thread finish at %s" % get_time_str())


if __name__ == '__main__':
    main()

代码问题无非语法错误以及逻辑错误。你运行没报错但结果不是预期，那就是你代码逻辑有问题。