Python解决缩进错误

Question

我已经编写了以下代码，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 存款（自己）： ^ IndentationError: 预期一个缩进块 错误。我需要这方面的帮助。

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

类 SavingsAccount(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(BankAccount): def init(self, balance=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

我需要一些关于缩进错误的帮助，以了解它是什么以及如何解决它。我是python新手

Answer 1

这是正确缩进且逻辑正确的代码。在向社区寻求支持之前，您必须阅读 Python 编码指南。

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

Answer 2

您的问题在于下面的函数定义；你不能只声明你需要给它们某种主体的空函数。

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

此外，如果您直接复制粘贴代码，那么您似乎没有使用足够的空格来缩进

即如果我复制粘贴该行

def deposit(self):

前面只有两个空格

Answer 3

需要进行许多更改。

1. 如果不想定义方法，可以使用pass

   def 撤回（自我）： 通过

2. 每个 if 条件后面都应该有冒号:

   如果 self.balance

Answer 4

Python 使用缩进来表示代码块。您必须在缩进级别上保持一致。选择制表符或一定数量的空格并在任何地方使用它。

您还必须至少有一个语句需要一个块。如果必须，请使用 pass 语句什么都不做。

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")