编写登录接口 & 简单进度条

登录接口

需求：

输入用户名密码

认证成功后返回欢迎信息

输入错误三次后锁定

# -*- coding:utf-8 -*- 
# Author：Brownyangyang
#import getpass
import sys
count=0
p=0
#username = input("username:")
while count < 3:
    username = input ("username:")
    f = open("lock_file.txt",'r+')
    lock_list=f.readlines()
    for lock_line in lock_list:
        lock_line = lock_line.strip('
')
        if username == lock_line:
            sys.exit('用户 %s 已经被锁定，退出' % username)

    k = open('user_list.txt','r')
    user_list = k.readlines()
    for user_line in user_list:
        (user,passwd) = user_line.strip('
').split()
        if username == user:
            j=0
            while j<3:
                password = input ("password:")
                if password == passwd:
                    print("Welcome,用户%s!!!" % username)
                    sys.exit(0)
                else:
                    print("用户%s密码错误" % username)
                j += 1
            else:
                f.write(username+'
')
                sys.exit("用户%s达到最大登录次数，退出。" % username)

        else:
             pass
    count += 1
    print("用户 %s 不存在，请重新输入" % username)
else:
    sys.exit("用户 %s 不存在，退出" % username)

f.close()
k.close()

简单进度条

# -*- coding:utf-8 -*- 
# Author：Brownyangyang
import sys,time
for i in range(30):
    sys.stdout.write(">>")
    sys.stdout.flush()
    time.sleep(0.5)