遇到这个python代码的问题

Question

我得到这个错误，我已经尝试通过栈流可用的帖子，我还没有得到解决方案。这是代码

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): 

//这是错误我得到：IndentationError: expected an indented block

Answer 1

其IndentationError。
完成类定义。

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"