用户注册登录验证 多版本集合 + hashlib加密

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018/5/6 0006 12:22
# @Author  : Anthony.Waa
# @Site    : 
# @File    : 用户登录（三次错误机会）.py
# @Software: PyCharm

# demo1
# 定义用户列表
user_list = [
    {'username': 'anthony', 'password': '123'},
    {'username': 'chris', 'password': '123'},
    {'username': 'alex', 'password': '123'},
    {'username': 'oldboy', 'password': '123'},
]

# 定义次数
count = 0

while True:
    # 用户名和密码
    users = input("请输入你的用户名：")
    pasws = input("请输入你的密码：")

    # 循环用户列表
    for lists in user_list:
        if lists['username'] == users and lists['password'] == pasws:
            print("登录成功")
            exit()
        else:
            print("登录失败,请重新登陆.")
            count += 1
            break
    if count == 3:
        print("你的用户名或密码,错误输入超过3次，退出登陆")
        exit()


# ======================================================================================


# demo2
# 定义用户列表
user_list = [
    {'username': 'anthony', 'password': '123'},
    {'username': 'chris', 'password': '123'},
    {'username': 'alex', 'password': '123'},
    {'username': 'oldboy', 'password': '123'},
]

# 定义次数
count = 0

# 定义状态
flag = False

while True:
    # 用户名和密码
    users = input("请输入你的用户名：")
    pasws = input("请输入你的密码：")

    # 循环用户列表
    for lists in user_list:
        if lists['username'] == users and lists['password'] == pasws:
            flag = True
        else:
            pass
    # 判断登陆状态
    if flag:
        print("登录成功")
        exit()
    else:
        print("登录失败,请重新登陆.")
        count += 1
        flag = False
    # 判断是否失败次数超过3次
    if count == 3:
        print("你的用户名或密码,错误输入超过3次，退出登陆")
        exit()

====================================================================
# 用户名和密码加密3次登录验证

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time    : 2018/7/8 0008 11:44
# @Author  : Anthony.Waa
# @Site    : 
# @File    : auth.py
# @Software: PyCharm

import hashlib
from conf import settings
def login():    # 用户登录
    count_end = 3
    counts = 1
    while True:
        username = input('请输入用户名:').strip()
        password = input('请输入密码:').strip()
        verifys = verify(username,password)
        if verifys == True:
            print('登录成功')
            exit()
        else:
            count_end -= 1
            print('账户名或密码输入错误,请重新输入...')
            print('还剩%s次输入机会...'%count_end)
            if counts == 3:
                print('账户或密码输入错误超过3次')
                exit()
            counts += 1


def verify(username,password):  # 用户名和密码验证
    md5_obj = hashlib.md5(username.encode('utf-8'))
    md5_obj.update(password.encode('utf-8'))
    with open(settings.userinfo_path, 'r') as read_verify:
        for userinfo_line in read_verify:
            if md5_obj.hexdigest() == userinfo_line.strip():
                return True


def register(): # 用户注册
    while True:
        print('提示：用户名必须小于8位,密码必须小于12位')
        username = input('请输入用户名:').strip()
        password = input('请输入密码:').strip()

        if 1 < len(username) <=8 and 1 < len(password) <= 12:
            md5_obj = hashlib.md5(username.encode('utf-8'))
            md5_obj.update(password.encode('utf-8'))
            verifys = verify(username, password)    # 验证密码和用户名是否存在

            if verifys == True:
                print('用户名已存在,请重新输入...')
            else:
                with open(settings.userinfo_path,'a+') as write_register:
                    write_register.write(md5_obj.hexdigest()+'\n')
                    print('注册成功')
                    judge_exit = input('是否继续注册(Y/N)：').strip()
                    if judge_exit.lower() == 'y':
                        continue
                    elif judge_exit.lower() == 'n':
                        print('退出成功')
                        exit()
                    else:
                        print('输入错误')

        else:
            print('用户名或密码位数不符合规定...')
            continue

login()
register()