Python-问一个python的语法问题

Question

这是一个多线程的例子：

import time
import threading
def loop(num,sec):
    print 'loop %s start: ....' % num, time.strftime('%Y-%M-%d %H:%m:%S')
    time.sleep(sec)
    print 'loop %s stop: .....' % num, time.strftime('%Y-%M-%d %H:%m:%S')

def main():
    print 'nStarting: ........', time.strftime('%Y-%M-%d %H:%m:%S'), 'n'
    mysec = [3,5,6,8]
    mythreads = [threading.Thread(target=loop,args=(i,mysec[i])) for i in range(len(mysec))]

    for i in mythreads:
        i.start()
    for i in mythreads:
        i.join()
    print 'nAll DONE: ........', time.strftime('%Y-%M-%d %H:%m:%S'), 'n'

if __name__=='__main__':
    main()

Answer 1

语句 for i in 列表

相当于
for i in 列表:
语句