练习题2 —— 模拟登陆:
用户输入帐号密码进行登陆
用户信息加注册时间保存在文件内
用户密码输入错误三次后锁定用户,下次再登录,检测到是这个用户也登录不了
储存账号的信息文件,涉及到文件名、和格式:
db-login.txt
dadada1|dadada1|2019-06-10 15:50:50 dadada2|dadada2|2019-06-10 16:02:03 dadada3|dadada3|2019-06-10 16:02:14 dadada|dadada|2019-06-11 18:29:03 dadada4|dadada4|2019-06-11 18:30:32 dadada5|dadada5|2019-06-11 18:34:43 dadada6|dadada6|2019-06-11 18:36:08 dadada100|dadada100|2019-06-11 18:43:40 dadada7|dadada7|2019-06-11 18:48:02 dadada8|dadada8|2019-06-11 19:16:50
db-ban.txt
1 dadada3|3
代码:
1 # @Time :2019/6/7 23:01 2 # -*- encoding:utf-8 -*- 3 4 from _datetime import datetime 5 6 def register(): 7 print("register".center(50,'*')) 8 user_list = [] 9 # 把db信息读取到列表中,检测注册的账号是否已经存在 10 with open('db-login.txt', mode='r+', encoding='utf-8') as f: 11 for line in f: 12 # print(line,type(line)) #asdd|asdd|2019-06-10 14:06:41 13 user_list.append(line.split('|')[0]) # 存放db中的账号,检测注册账号是否重复 14 15 username = input("username : ") 16 pwd = input("pwd:") 17 ctime = datetime.now().strftime('%Y-%m-%d %H:%M:%S') 18 if username in user_list: 19 print("账号已存在,请重新注册") 20 return register() #调用该函数,重新注册 ***出了问题,如何调用自己继续注册? 21 else: 22 line = '%s|%s|%s\n' % (username, pwd, ctime) 23 f.seek(0, 2) 24 f.write(line) 25 return True 26 27 28 29 def login(): 30 sign = True #登录成功时,sign为False,否则将一直登录 31 count = 0 # 计次,控制账号是否锁定 32 while sign: 33 db_login = {}#允许登录的信息 34 db_ban = {} #被锁定账号的信息 35 #把db-login.txt中的信息 存到 db_login字典中 36 with open('db-login.txt',mode='r',encoding='utf-8') as f : 37 for line in f : 38 line = line.split('|') 39 k,v =line[0], line[1] 40 db_login.setdefault(k,v) 41 42 #把db_ban.txt中的信息 存到 db_ban字典中 43 with open('db_ban.txt',mode='r',encoding='utf-8') as f : 44 for line in f: 45 line = line.split('|') 46 db_ban.setdefault(line[0],line[1]) 47 48 print("login".center(50,'*')) 49 username = input("username : ") 50 pwd = input("pwd:") 51 52 ''' 53 输入的username有以下几种情况: 54 1.账号已锁定,无法登录 55 2.count 等于 3 账号讲被锁定 56 3.输入的账号不存在db_login字典中 57 4.输入的账号存在db_login字典中: 58 1).账号密码正确 ==》登陆成功 59 1).账号密码不正确 ==》登陆失败 count+=1 60 ''' 61 if db_ban.__contains__(username) : 62 print("账号已锁定,无法登录") 63 64 elif count == 2: 65 print("错了3次,账号:%s 已经被锁定"%username) 66 db_ban.setdefault(username,pwd) 67 for k ,v in db_ban.items(): 68 with open('db_ban.txt',mode='r+',encoding='utf-8') as f: 69 line = "%s|%s "%(k,v) 70 f.seek(0,2) 71 f.write(line) 72 73 elif not db_login.__contains__(username): 74 print("账号不存在") 75 76 else: 77 for k ,v in db_login.items(): 78 if username == k and pwd == v : 79 80 sign = False 81 82 83 if not sign : 84 print("登录成功") 85 86 else: 87 print("账号密码不匹配") 88 count += 1 89 print("三次错误登录,账号讲锁定") 90 print("这是第%d登录" % count) 91 92 93 def run(): 94 while True: 95 print("注册输1\n登陆输2\n退出输q") 96 choice = input(">>> ") 97 if choice == '1': 98 if register() : 99 print("注册成功") 100 else: 101 print(" 注册失败") 102 elif choice == '2': 103 login() 104 elif choice == 'q': 105 exit() 106 else: 107 print("Wrong inputing") 108 109 if __name__ == '__main__': 110 run()