3，31作业

# 1、把登录与注册的密码都换成密文形式
# import hashlib
# def register():
#     m=hashlib.md5()
#     user=input('请输入用户名：')
#     pwd=input('请输入密码：')
#     re_pwd=input('请输入密码：')
#     if pwd==re_pwd:
#         m.update(pwd.encode('utf-8'))
#         res=m.hexdigest()
#         with open('db.txt',mode='at',encoding='utf-8')as f:
#             f.write(f'{user}:{res}\n')
#     else:
#         print('两次密码不一致')
#
# dic={}
# def login():
#     user = input('请输入用户名：')
#     with open('db.txt', mode='rt', encoding='utf-8')as f:
#         for line in f:
#             username,password=line.strip().strip(':')
#             dic[username]=password
#             if user in username:
#                 pwd = input('请输入密码：')
#                 m=hashlib.md5(pwd)
#                 res=m.hexdigest
#                 if res==dic[username]:
#                     print('登录成功')
#                 else:
#                     pass
#             else:
#                  pass
# 2、文件完整性校验（考虑大文件）
import hashlib
def srt_file():
    with open('srt_file_txt',mode='rb')as f1:
        m=hashlib.md5()
        for i in [0,150,300]:
            f1.seek(i,0)
            res=f1.read(50)
            m.update(res)
        content=m.hexdigest
    return content

def dst_file():
    with open('dst_file_txt',mode='rb')as f2:
        m=hashlib.md5()
        for i in [0,150,300]:
            f2.seek(i,0)
            res=f2.read(50)
            m.update(res)
        content2=m.hexdigest
        if content2==srt_file():
            print('文件一致')
        else:
            print('文件不一致')


# 3、注册功能改用json实现
import hashlib
import json
def register():
    m=hashlib.md5()
    user=input('请输入用户名：')
    pwd=input('请输入密码：')
    re_pwd=input('请输入密码：')
    if pwd==re_pwd:
        m.update(pwd.encode('utf-8'))
        res=m.hexdigest()
        with open('db.txt',mode='at',encoding='utf-8')as f:
            json.dump(f'{user}:{res}\n',f)
    else:
        print('两次密码不一致')

# 4、项目的配置文件采用configparser进行解析