遇到這個python代碼的問題

Question

我得到這個錯誤，我已經嘗試通過棧流可用的帖子，我還沒有得到解決方案。這是代碼

class BankAccount: 
    def _init_(self,balance): 
     self.balance = balance 
    def deposit(self,amount): 
     self.balance += amount 
     return self.balance 
    def withdraw(self,amount): 
     if amount>self.balance: 
      print "invalid transaction" 
     else: 
      self.balance -= amount 
      return self.balance 
class MinimumBalanceAcccount(BankAccount): 

//這是錯誤我得到：IndentationError: expected an indented block

Answer 1

其IndentationError。
完成類定義。

class BankAccount: 
    def _init_(self,balance): 
    self.balance = balance 
    def deposit(self,amount): 
    self.balance += amount 
    return self.balance 
    def withdraw(self,amount): 
    if amount>self.balance: 
     print "invalid transaction" 
    else: 
     self.balance -= amount 
     return self.balance 

class MinimumBalanceAcccount(BankAccount): 
    def __init__(self): 
    print "working"