python 多线程,并且返回函数方法的值

#!/usr/bin/env python
#-*- coding: utf-8 -*- 
from time import ctime, sleep
import threading
import time

loops = ['江西', '吉安']

class MyThread(threading.Thread):
    """
    重构threading方法，单独写一个获取返回值的方法,get_result
    """
    def __init__(self, func, args, name=''):
        threading.Thread.__init__(self)
        self.name = name
        self.func = func
        self.args = args

    def run(self):
        self.result = self.func(*self.args)

    def get_result(self):
        try:
            return self.result
        except Exception:
            return None


def loop(n):
    print("task", n)
    time.sleep(1)
    print('2s')
    time.sleep(1)
    print('1s')
    time.sleep(1)
    print('0s')
    time.sleep(1)
    return n


def main():
    print('start at', ctime())
    threads = []
    nloops = range(len(loops))
    for i in nloops:
        t = MyThread(loop, (loops[i],), loop.__name__)
        threads.append(t)
    for i in nloops:  # start threads 此处并不会执行线程，而是将任务分发到每个线程，同步线程。等同步完成后再开始执行start方法
        threads[i].start()
    for i in nloops:  # jion()方法等待线程完成
        threads[i].join()
    print("loop.__name__",loop.__name__)
    print(threads[1].get_result())
    print('DONE AT:', ctime())


if __name__ == '__main__':
    main()

结果

start at Wed Feb  3 18:23:29 2021
task 江西
task 吉安
2s2s

1s
1s
0s
0s
loop.__name__ loop
吉安
DONE AT: Wed Feb  3 18:23:33 2021