python的小程序

class Account:
 def __init__(self, number, name):
 self.number = number 
 self.name = name
 self.balance = 0
 def deposit(self, amount):
 if amount <= 0:
 raise ValueError('must be positive(存入金额有误)')
 self.balance += amount
 def withdraw(self, amount):
 if amount <= self.balance:
 self.balance -= amount
 else:
 raise RuntimeError('balance not enough(余额不足)')
 account=input('请输入您的账号(账号现仅能选择Justin、Momor)：')
 f=int(input('请选择操作类型，1为存款，0为取款,请选择：',))
 if f==1:
 c=int(input('请输入存款金额(必须为整数):',))
 elif f==0:
 d=int(input('请输入取款金额(必须为整数):',))
 else:
 raise RuntimeError('您输入有误，谢谢使用，再见')
 if f==1:
 if c>=0:
 a=c
 else:
 raise ValueError('您输入的金额有误,谢谢使用')
 elif f==0:
 if d>=0:
 b=d
 else:
 raise ValueError('您输入的金额有误,谢谢使用') 
 acct1 = Account('123-456-789', 'Justin')
 deposit1 = acct1.deposit
 withdraw1 = acct1.withdraw
 acct2 = Account('987-654-321', 'Momor')
 deposit2 = acct2.deposit
 withdraw2 = acct2.withdraw
 if account ==acct1.name:
 if f==1:
 deposit1(a)
 elif f==0:
 withdraw1(b)
 print('账号:',acct1.name,'当前余额为：',acct1.balance) 
 elif account ==acct2.name:
 if f==1:
 deposit2(a)
 elif f==0:
 withdraw2(b)
 print('账号:',acct2.name,'当前余额为：',acct2.balance)