python 练习一 从文本中读取用户名密码并登录

 1 # Author:Roach
 2 import sys
 3 name_list = open(‘user_pass‘,‘r+‘)
 4 # 打开记录用户名密码的文本，文本内格式为：test:test
 5 name_text = dict(line.strip().split(":") for line in name_list if line)
 6 # 将每行分别读取并作为字典
 7 
 8 for i in range(3):
 9     username = input("username:")
10     password = input("password:")
11     lock_name = open(‘locked‘, ‘r+‘)
12 # 检测用户是否被锁定
13     for j in lock_name.readlines():
14         if username == j.strip():
15             print("因尝试过多导致{}用户锁定".format(username))
16             exit(1)
17 # 验证用户名密码是否正确
18     if password == name_text.get(username):
19         print("Welcome user {name} login...".format(name=username))
20         break
21 # 输入两次后用户被锁定，将锁定用户写入locked文件中
22     elif i == 2:
23         lock_name = open(‘locked‘,‘a+‘)
24         lock_name.write(username+‘\n‘)
25         lock_name.close()
26         print("因尝试过多导致{}用户锁定".format(username))
27         exit(2)
28     else:
29         print(‘‘‘Invalid username or password!
30 ---------剩余尝试次数:{}---------‘‘‘.format(2-i))