JAVA -1 Python +1

import java.util.Scanner;
public class simpleBank {


    public static void main(String[] args) {
        Scanner keyboard = new Scanner(System.in);
        int pin = 1234, pin_attempts = 3, user_pin_try, user_choice;
        double balance = 340.0, withdraw_limit = 500, user_transfer_money;
        boolean continue_banking = true, input_valid;

        // A simple greeting
        System.out.println("Welcome to Jan Bank");
        System.out.println("");

        //login part of the script
        System.out.println("Please enter your 4 digit PIN.");
        user_pin_try = keyboard.nextInt();
        while (pin_attempts > 1) {
            if (user_pin_try == pin) {
                break;
            }
            else {
                pin_attempts -= 1;
                System.out.println("Wrong PIN, you have " + pin_attempts + " attempt(s) remaining.");
                System.out.println("Please enter your 4 digit PIN.");
                user_pin_try = keyboard.nextInt();
            }
        }
        // once they have logged in
        if (pin == user_pin_try){
            System.out.println("Access Granted");
            while (continue_banking) {
                System.out.println("");
                System.out.println("What would you like to do?");
                System.out.println("    Enter 1 to withdraw money");
                System.out.println("    Enter 2 to deposit money");
                System.out.println("    Enter 3 to view your current balance");
                System.out.println("    Enter 4 to quit");

                user_choice = keyboard.nextInt();

                // 1, they want to take money out of their account
                input_valid = false;
                if (user_choice == 1) {
                    while (input_valid == false) {
                        System.out.println("How much money would you like to withdraw? (Enter 0 to cancel)");
                        System.out.println("Your current balance is $" + balance);
                        System.out.println("You can withdraw up to $" + withdraw_limit);
                        user_transfer_money = keyboard.nextDouble();
                        // 0, the user wants to cancel
                        if (user_transfer_money == 0) {
                            input_valid = true;
                            System.out.println("Action Canceled");
                        }
                        // the user goes over the limit
                        else if (user_transfer_money > withdraw_limit){
                            System.out.println("You cannot withdraw $" + user_transfer_money + ", limit is $" + withdraw_limit);
                        }
                        // they do not have enough money
                        else if (user_transfer_money > balance){
                            System.out.println("You cannot withdraw $" + user_transfer_money + ", you only have $" + balance);
                        }
                        // the input is correct
                        else{
                            balance -= user_transfer_money;
                            System.out.println("You new balance is $" + balance);
                            input_valid = true;
                        }
                    }
                }
                // the user wants to add money
                input_valid = false;
                else if (user_choice == 2) {
                    while (input_valid == false){
                        System.out.println("How much would you like to deposit? (Enter 0 to cancel");
                        System.out.println("Your current balance is $" + balance);
                        user_transfer_money = keyboard.nextDouble();
                        // 0, the user wants to cancel
                        if (user_transfer_money == 0) {
                            input_valid = true;
                            System.out.println("Action Canceled");
                        }
                        else {
                            balance += user_transfer_money;
                            System.out.println("You new balance is $" + balance);
                            input_valid = true;
                        }
                    }
                }
                // user want to check balance
                else if (user_choice == 3) {
                    System.out.println("Your current balance is $" + balance);
                }
                else if (user_choice == 4) {
                    System.out.println("Ending Session");
                }
                else {
                    System.out.println("Invalid Input");
                }
            }
        }
    }

}