Python程序创建具有存款、取款函数的 Bankaccount 类

先决条件： Python中的面向对象编程
让我们使用 OOP 概念编写一个简单的Python程序来执行一些简单的银行操作，例如存款和取款。
首先，定义类Bankaccount。这一步之后是使用 __init__ 定义一个函数。一旦实例化类的对象，它就会运行。这个 __init__ 方法对于做任何你想对对象做的初始化很有用，然后我们有默认的参数 self。

Python3

# BankAccount class
class Bankaccount:
    def __init__(self):

这一步之后是使用 self 参数声明余额为 0，然后我们简单地打印一条欢迎机器的声明。在函数存款和取款中，金额作为输入（以浮动形式），然后添加/减去余额。因此，结果余额打印在下一行。

Python3

# Function to deposite amount
def deposit(self):
        amount = float(input("Enter amount to be deposited: "))
        self.balance += amount
        print("\n Amount Deposited:", amount)

使用 if 条件检查是否存在充分
账户中可用于处理提款的金额。

Python3

# Function to withdraw the amount
def withdraw(self):
        amount = float(input("Enter amount to be withdrawn: "))
        if self.balance >= amount:
            self.balance -= amount
            print("\n You Withdrew:", amount)
        else:
            print("\n Insufficient balance  ")

接下来，我们使用显示函数来显示账户中的余额。然后我们创建一个对象并调用它来执行程序。

Python3

# Function to display the amount
def display(self):
        print("\n Net Available Balance =", self.balance)

下面是实现：

Python3

# Python program to create Bankaccount class
# with both a deposit() and a withdraw() function
class Bank_Account:
    def __init__(self):
        self.balance=0
        print("Hello!!! Welcome to the Deposit & Withdrawal Machine")
 
    def deposit(self):
        amount=float(input("Enter amount to be Deposited: "))
        self.balance += amount
        print("\n Amount Deposited:",amount)
 
    def withdraw(self):
        amount = float(input("Enter amount to be Withdrawn: "))
        if self.balance>=amount:
            self.balance-=amount
            print("\n You Withdrew:", amount)
        else:
            print("\n Insufficient balance  ")
 
    def display(self):
        print("\n Net Available Balance=",self.balance)
 
# Driver code
  
# creating an object of class
s = Bank_Account()
  
# Calling functions with that class object
s.deposit()
s.withdraw()
s.display()

输出：

Hello !!! Welcome to Deposit&Withdrawal Machine
Enter amount to be deposited: 
 Amount Deposited: 1000.0
Enter amount to be withdrawn: 
 You Withdrew: 500.0

 Net Available Balance = 500.0