Register and login code

registered:

#1、先把文件内容读出来

user_info = {}
fw = open('users','a+',encoding='utf-8')
fw.seek(0)
for line in fw:
    line = line.strip()
    if line!='':
        username,password,error_count = line.split(',')
        user_info[username] = {'password':password,'error_count':int(error_count)}

for i in range(3):
    username = input('username:').strip().lower()
    password = input('password:').strip()
    cpassword = input('cpassword:').strip()
    if username=='' or password=='' or cpassword=='':
        print('账号？密码、确认密码不能为空')
    elif len(username)<6 orlen (username)> 12 is or   len (password) <. 6 or len (password)> 12 is :
         Print ( ' length username / password minimum 6, maximum 12 ' )
     elif password =! cPassword:
         Print ( ' two input inconsistent password ' )
     elif username in USER_INFO:
         Print ( ' user name already exists! ' )
     the else : 
        USER_STR is = ' % S,% S, 0 \ n- ' % (username, password)  
        fw.write (USER_STR is)
        fw.flush () #
        user_info[username] = {'password': password, 'error_count': 0}
        print('注册成功！')
        # break
fw.close()

log in

# 2, log 2PY 
# . 1, account number, password is not blank 
# 2, to verify whether the account the presence, absence prompted to 
# 3, a maximum of three times the input 
# 4, account insensitive 
# 5, account number, and password to greater than or equal to 6 and less than or equal to 12 
# 6, when the wrong password each time you log in, you add back this account of a number of failures, 
# 7, and if that fails, then the number is greater than three times, suggesting that the account has been locked. 
Import datetime 
USER_INFO = {} 
FW = Open ( ' Users ' , ' A + ' , encoding = ' UTF-. 8 ' ) 
fw.seek (0) 
for Line in FW: 
    Line = line.strip ()
     IF line!='':
        username,password,error_count = line.split(',')
        user_info[username] = {'password':password,'error_count':int(error_count)}

for i in range(3):
    username = input('username:').strip().lower()
    password = input('password:').strip()
    if username=='' or password=='':
         Print ( ' account password can not be empty? ' )
     Elif <. 6 len (username) or len (username)> 12 is or   len (password) <. 6 or len (password)> 12 is :
         Print ( ' Minimum length of the ID / password 6, maximum 12 ' )
     elif username not  in user_info:
         Print ( ' ! user name does not exist ' )
     elif user_info [username] [ ' ERROR_COUNT ' ]> 3 :
         Print ( ' enter the wrong password too many times!')
    elif user_info.get(username).get('password') !=password:
        print('密码错误！')
        user_info[username]['error_count']+=1
    else:
        print('登录成功！%s'%datetime.datetime.now())
        break



fw.seek(0)
fw.truncate()



for username,user_dict in user_info.items():
    password= user_dict.get('password')
    error_count= user_dict.get('error_count')
    user_str = '%s,%s,%s\n'%(username,password,error_count)
    fw.write(user_str)
    fw.flush()

fw.close()