python语句-while

py3study

发布于 2018-08-02 11:17:33

4510

发布于 2018-08-02 11:17:33

文章被收录于专栏：python3python3

while循环表达式如下:

while boolean expression:

执行语句

编写一个test_while.py实验一下，代码如下:

# coding: utf-8
__author__ = 'www.py3study.com'
import getpass
class fakelogin(object):
    def __init__(self):
        self.name = 'root'
        self.password = 'haha,no pw'
        self.banner = 'hello, you have login system'
        self.run()
    def run(self):
        '''仿linux终端登录窗口'''
        print(u"不好意思，只有一个用户root")
        print(u"偷偷告诉你，密码是6个8哦")
        while True:
            print(u"login:root")
            pw = getpass.getpass("password:")
            if pw == '888888':
                print(u"{}".format(self.banner))
                print(u"退出程序")
                exit()
            else:
                if len(pw) > 12:
                    print(u"密码长度应该小于12")
                    continue
                elif len(pw) < 6:
                    print(u"密码长度大于6才对")
                    continue
                else:
                    print(u"可惜，密码错误，继续猜")
                    continue
if __name__ == '__main__':
    fl = fakelogin()

应该看到的结果