Aims

Develop a Python program to solve a problem

Follow good program development and coding style practices

Develop a Graphical User Interface

Instructions

Write a Python program to solve the following problem. Your solution should include a readme.md file $($which includes details of how to run your assignment$)$ and your Python program in a file named payment.py$,$ and be submitted as a single $.$tgz file named pt$3.$tgz$.$ You should ensure your solution works using the Python $3$ interpreter on turing.

Problem

Customers and the store manager are delighted with the new automated self$-$check$-$in system. However, there have been complaints about the payment process, which still requires customers to visit the service desk and queue up for payment while a human clerk handles the transaction.

To address this issue, the store manager has devised a plan to enhance the self$-$check$-$in counter by introducing a graphical user interface $($GUI$)$ for credit card payments. Your task is to develop this GUI, ensuring it meets the following requirements:

The application's GUI should start by presenting the payment interface, which includes fields for entering the amount due $($a positive numeric value$)$ and the credit card number $(16$ digits$).$ Users should find it intuitive to input these values correctly on the designed interface $.$

The payment interface should feature a "Pay" button to initiate the payment process. When users press this button, the application must first validate the entered values for the amount due and the credit card number. If both values are accurate, the application should record the payment amount and the credit card number within a list of dictionaries data structure. Subsequently, a confirmation message box should appear, thanking the customer for their payment and ensuring that the main interface is reset to its default state $($e$.$g$.,$ clearing any previous inputs from text boxes $/$ label elements$).$ In the event of incorrect values, the application should display an error message in a message box, specifying the issue $($e$.$g$.,$ "Error: the credit card number must consist of $16$ digits without spaces or other characters"$).$

The payment interface should also include a button for "Operator Mode." When this button is pressed, a new window should be created and displayed. This window should contain a concealed input field for entering a password, indicated by asterisks $(*)$ in place of the actual characters typed. The input field should be clearly labeled, instructing the user to enter the correct password. The new window should also feature a "Submit" button for submitting the entered password. If the password is correct $("$Codetown$"),$ the application should close the password window and open a new window listing all transactions, displaying the amount paid and the associated credit card numbers, along with the total payments collected thus far $($saving transactions to a persistent file is not required$).$ In case of an incorrect password, the application should display an error message in a message box, prompting the user to re$-$enter the correct password.

The application's GUI should be implemented using the Python package Tkinter. Using alternative packages for GUI elements may result in substantial deductions.