python read the file data to achieve a simple registration operation

! # / usr / bin / env Python 
# - * - Coding: UTF-8 - * - 
# @time: 2019-11-21 14:32 
# @ Player: zhaohq 
# @email: [email protected] 
# @file : zhuc.py 
name = INPUT ( 'name:') 
with Open ( 'zhuc.txt', 'A') AS FO: 
    with Open ( 'zhuc.txt', 'R & lt') AS FO: 
        Data = fo.readlines () # read information to the data 
        COUNT data .__ len = __ () # calculates data amount of data 
I = 0 
the while I <COUNT: 
    with Open ( 'zhuc.txt', 'R & lt') AS fo1 of: 
        data = fo1.readlines ( ) # read information to the data 
        COUNT data .__ len = __ () # calculates data amount of data 
        str1 = data [I] 
        str2 str1 = [: str1.rfind ( '\ T')] # reads the user name 
        if name == str2 :
            print ( 'username already registered, please enter a different user name')
            name = input('name:')
            i = 0
            continue
        else:
            i = i+1
            continue
else:
    password = input('password')
    with open('zhuc.txt', 'a') as fo:
        fo.writelines([name, '\t', password, '\n'])
        print('注册成功')