day3- python 注册

# 1、先把文件内容的账号密码放到list/字典

f = open('users')
result = f.read()
f.close()
user_list = result.split()  # 
user_dic = {}  # 存放所有的用户
for user in user_list:
    username,password = user.split(',')
    user_dic[username] = password

fw = open('user','a')
for i in range(3):
    user = input('username:').strip().upper()
    pd = input('password').strip()
    cpd = input('cpwd').strip()
    if len(user) not in range(6,11) or len(pd) not in range(6,11) :
        print('账号/长度不在6-10位之间')
    elif pd != cpd:
        print('两次输入密码不一致')
    elif user in user_dic:
        print('用户已经存在')
    else:
        user_dic[user] = password
        s = '%s,%s
' %(user,pd)
        fw.write(s)
        print('注册成功')
        break
else:
    print('失败次数过多！')