Python解决缩进错误

Question

我写了下面的代码，但是当我尝试运行它时，我得到一个文件“C：\ Users \ Moses \ Desktop \ test.py”，第4行 def deposit（self）： ^ IndentationError：预计会出现缩进块错误。我需要帮助。

class BankAccount(object): 
def withdraw(self): 
    pass 
def deposit(self): 
    pass 

类SavingsAccount（的BankAccount）：

def __init__(self, balance=500.0): 
self.balance = balance 

def deposit(self, deposit_amount): 
self.balance += deposit_amount 
    return self.balance 

    if deposit_amount < 0: 
    raise RuntimeError('Invalid deposit amount.') 

def withdraw(self, withdraw_amount): 
self.balance -= withdraw_amount 
    return self.balance 

    if self.balance < 500: 
    raise RuntimeError('Cannot withdraw beyond the minimum account balance') 
    return self.balance 

    if withdraw_amount > self.balance: 
    raise RuntimeError('Cannot withdraw beyond the current account balance') 
    return self.balance 

    if withdraw_amount < 0: 
    raise RuntimeError('Invalid withdraw amount') 

类CurrentAmount（的BankAccount）： DEF 初始化（个体，平衡= 0.0）： self.balance =平衡

def deposit(self,deposit_amount) 
self.balance += deposit_amount 
    return self.balance 

    if amount < 0: 
    raise RuntimeError('Invalid deposit amount.') 
    return self.balance 


def withdraw(self, withdraw_amount): 
    self.balance -= withdraw_amount 
    return self.balance 

    if withdwa_amount < 0: 
    raise RuntimeError('Invalid withdraw amount') 
    return self.balance 

    if withdwa_amount > self.balance: 
    raise RuntimeError('Cannot withdraw beyond the current account balance') 
    return self.balance 

我需要一点缩进错误的帮助，了解它是什么以及如何解决它。我是新来的python

Answer 1

你的问题在于下面的函数定义;你不能声明你需要给它们某种形式的空函数。

class BankAccount(object): 
    def withdraw(self): 
     pass 
    def deposit(self): 
     pass 

此外，如果有直接复制粘贴你的代码，它看起来像你没有使用足够的空间来缩进

也就是说，如果我复制粘贴线

def deposit(self):

它只有2个空格前

Answer 2

Python使用缩进来指示代码块。您的必须在缩进级别保持一致。挑选标签或一定数量的空格并使用。

您还必须至少有一个语句在预期块的位置。如果必须，请使用pass语句不做任何事情。

class BankAccount(object): 
    def withdraw(self): 
     pass  # Add this 

    def deposit(self): 
     pass  # Add this 

    def other_function(self): 
     if 42 != 42: 
      raise EndOfTheWorldError("what") 

Answer 3

需要进行许多更改。

1. 如果你不想定义方法，你可以使用pass

   高清撤销（个体经营）： 通

2. 每个如果条件之后，应该有冒号:

   if self.balance < 500：

Answer 4

这是适当缩进和逻辑正确的代码。在向社区提供支持之前，您必须阅读python编码准则。

class BankAccount(object): 
    def withdraw(self, withdraw_amount): 
     pass 

    def deposit(self, deposit_amount): 
     pass 


class SavingsAccount(BankAccount): 
    def __init__(self, balance=500.0): 
     self.balance = balance 

    def deposit(self, deposit_amount): 
     if deposit_amount < 0: 
      raise RuntimeError('Invalid deposit amount.') 
     self.balance += deposit_amount 
     return self.balance 

    def withdraw(self, withdraw_amount): 
     if self.balance < 500: 
      raise RuntimeError('Cannot withdraw beyond the minimum account balance') 

     if withdraw_amount > self.balance: 
      raise RuntimeError('Cannot withdraw beyond the current account balance') 

     if withdraw_amount < 0: 
      raise RuntimeError('Invalid withdraw amount.') 

     self.balance -= withdraw_amount 
     return self.balance 


class CurrentAmount(BankAccount): 
    def __init__(self, balance=0.0): 
     self.balance = balance 

    def deposit(self,deposit_amount): 
     if deposit_amount < 0: 
      raise RuntimeError('Invalid deposit amount.') 

     self.balance += deposit_amount 
     return self.balance 

    def withdraw(self, withdraw_amount): 
     if withdraw_amount < 0: 
      raise RuntimeError('Invalid withdraw amount') 

     if withdraw_amount > self.balance: 
     raise RuntimeError('Cannot withdraw beyond the current account balance') 

     self.balance -= withdraw_amount 
     return self.balance