db_path='db.txt' #定义默认文件路径,方便修改 def get_uname(): while True: uname=input('请输入用户名:').strip() if uname.isalpha(): with open(r'%s' %(db_path),'r',encoding='utf-8') as f: for i in f: unifo=i.strip(' ').split(',') print (unifo) #查看查找过程 if uname==unifo[0]: print('用户已存在,请重新输入') break else: return uname else: print ('用户名必须是中文或字母') def get_pwd(): while True: pwd1=input('请输入密码:').strip() pwd2=input('请再次输入密码:').strip() if pwd1 == pwd2: return pwd1 else: print('两次输入的密码不一致,请重新输入...') def get_bal(): while True: bal=input('请输入余额:') if bal.isdecimal(): return bal else: print ('钱是数字,傻逼 。。。') def file_hanle(uname, pwd, bal): with open(r'%s' %(db_path),'a',encoding='utf-8') as f: f.write('%s,%s,%s ' %(uname, pwd, bal)) def register(): uname = get_uname() # 拿到合法的用户名 pwd = get_pwd() # 拿到合法的密码 bal = get_bal() # 拿到合法的余额 file_hanle(uname, pwd, bal) # 写入文件 register()