python3----练习题(....)

 1 import re
 2 import hashlib
 3 import json
 4 
 5 def get_md5(pwd):     # md5加密
 6     m = hashlib.md5()
 7     m.update(pwd.encode(‘utf-8‘))
 8     return m.hexdigest()
 9 
10 def get_name_md5():    # ‘加盐’加密
11     hash = hashlib.md5(‘python‘.encode(‘utf-8‘))
12     hash.update(‘admin‘.encode(‘utf-8‘))
13     return hash.hexdigest()
14 
15 def write_to_file(content):
16     with open(‘dic.txt‘, ‘a‘, encoding=‘utf-8‘) as f:
17         f.write(json.dumps(content, ensure_ascii=False) + ‘\n‘)
18         f.close()
19 
20 def to_file_read():
21     with open(‘dic.txt‘, ‘r‘, encoding=‘utf-8‘) as f:
22         lines = f.readlines()  # 读取全部内容
23         f.close()
24         return lines
25 
26 def regist():
27     dd = {}
28     print(‘{0:*^50}‘.format(‘用户注册界面‘))
29     name = input("请输入你的用户名(以字母开头):")
30     if re.match(r‘^[a-zA-Z].{2,9}‘, name):
31         pwd = input("请设置密码:")
32         pwd = get_md5(pwd)
33         dd[name] = pwd
34         write_to_file(dd)
35         print(dd)
36     else:
37         print("您输入的用户名格式不正确,请小于10位")
38         regist()
39 
40 
41 def login():
42     print(‘{0:*^50}‘.format(‘用户登录界面‘))
43     name = input(‘帐号:‘)
44     # lines = to_file_read()
45     for line in to_file_read():
46         dic1 = json.loads(line)
47         if name in dic1:
48             pwd = input(‘密码:‘)
49             pwd = get_md5(pwd)
50             if dic1[name] == pwd:
51                 print("登录成功")
52                 return True
53     print("帐号或密码错误!")
54     login()
55 
56 def main():
57      login()
58 
59 if __name__ == ‘__main__‘:
60     main()