1.
flag = 1 #定义一个循环结束标志 while flag: current_time = time.localtime(time.time()) if current_time.tm_hour == 17 and current_time.tm_min == 9 and current_time.tm_sec == 40: print "Hello World" # 要执行的任务 flag = 0 # 取反,退出循环 time.sleep(1)