Class Constructor

def $\_\_$init$\_\_($self$,$ account$\_$number, balance$=0)$: self.account$\_$number $=$ account$\_$number self.balance $=$ balance

Creates a new bank account with:

Required account number

Optional starting balance $($defaults to $$0)$

$2.$ Deposit Method

def deposit$($self$,$ amount$)$: if amount $>0$: self.balance $+=$ amount return True return False

Checks if amount is positive

Adds amount to balance if valid

Returns True for success, False for invalid amount

$3.$ Withdraw Method

def withdraw$($self$,$ amount$)$: if $0<$ amount $<=$ self.balance: self.balance $-=$ amount return True return False

Verifies amount is positive and not more than balance

Subtracts amount if valid

Returns True for success, False if invalid or insufficient funds

$4.$ Balance Check Method

def get$\_$balance$($self$)$: return self.balance

Simply returns the current account balance

$5.$ Test Code

if $\_\_$name$\_\_=="\_\_$main$\_\_"$: account $=$ BankAccount$("1234567890")$ account.deposit$(100)$ account.withdraw$(50)$ if not account.withdraw$(100)$: print$("$Invalid withdrawal amount"$)$

Test sequence:

Creates account #$1234567890$

Deposits $$100$

Withdraws $$50$

Attempts to withdraw $$100($fails due to insufficient funds$)$

Step $3$: Add a New Method

A method is a function that belongs to a class and defines an action that objects of that class can perform. In this code, deposit$($self$,$ amount$)$ is a method that:

Takes a money amount as input$$Checks if the amount is positiveIf valid, adds that amount to the account's balance and returns TrueIf invalid $($negative$/$zero$),$ returns False without changing the balance

Add the deposit$($self$,$ amount$)$method to your BankAccount class after the existing methods:

def add$\_$interest$($self$,$ rate$)$: # Convert percentage to decimal $(5\%->0\mathrm{.}05)$ interest$\_$rate $=$ rate $/100$ # Calculate interest amount interest$\_$amount $=$ self.balance $*$ interest$\_$rate # Add interest to balance self.balance $+=$ interest$\_$amount

$2.$ Run the code again to ensure your new method works correctly. Remember to test your code thoroughly before submitting! $$