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ITECH1400 – Foundations of Programming School of Science, Engineering and Information Technology CRICOS Provider No. 00103D Page 1 of 10 ITECH1400 - Assignment 2 – FedUni Banking Due Date: 5pm, Friday...

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ITECH1400 – Foundations of Programming
School of Science, Engineering and Information Technology
CRICOS Provider No. 00103D Page 1 of 10
ITECH1400 - Assignment 2 – FedUni Banking
Due Date: 5pm, Friday of Week 11
This assignment will test your skills in designing and programming applications to specification and is worth
20% of your non-invigilated (type A) marks for this course. This is an INDIVIDUAL ASSIGNMENT – and while
you may discuss it with your fellow students, you must not share designs or code or you will be in
each of
the university plagiarism rules. This assignment should take you approximately 20 hours to complete.
Assignment Overview
You are tasked with creating an application that uses a GUI that simulates a simple banking interface similar to
an ATM / online banking using the Python 3 programming language.
The assignment is
oken up into five main components:
1.) The ability to provide an account number and a PIN
(Personal Identification Number) to sign into a bank
account,

2.) The ability to view the balance of the bank account and
to deposit and withdraw virtual money into and out
from the account,

3.) The ability to save transactions via file storage so that
you can log in, deposit some money and then log out –
and when you log back in that money is still there, and
finally

4.) The ability to display a graph of projected earnings on
the bank account via the compound interest accrued
over a variable amount of time.

5.) A Test Case that ensures your BankAccount's deposit and withdraw functionality operates co
ectly.
Your submission should consist of three Python scripts that implement this application as described in the
following pages: bankaccount.py, main.py along with a testbankaccount.py which contains a small test case
with a few simple unit tests than ensure that your bank accounts deposit_funds and withdraw_funds methods
operate co
ectly.
You are provided with a 'stub' of each of these files which contain all the function declarations and comments
which describe the role of the function and how it can be put together, but you will have to write the code for
vast majority of the functions yourself. You are also provided with a stub of the bankaccounttestcase.py file.
Your final submission should be a zipped archive (i.e. ‘zip file’) containing your completed Python scripts.
There is no word processed component to this second assignment.
ITECH1400 – Foundations of Programming
School of Science, Engineering and Information Technology
CRICOS Provider No. 00103D Page 2 of 10
Bank Account Class Design
The design for a BankAccount object is laid out in the following class diagram:



As you might imagine, the deposit_funds(amount) function adds that money to the cu
ent balance of the
account, and the withdraw_funds(amount) function removes (i.e. subtracts) money from the cu
ent balance
of the account. Each transaction in the transaction_list is a tuple containing either the word Deposit or the word
Withdrawal followed by an amount, for example: ("Deposit", XXXXXXXXXXor ("Withdrawal", 100.0).
The bank accounts in our program do not have an overdraft facility so the user cannot withdraw money they
do not have – that is, if they had $200 in their account and they tried to withdraw more than $200 then the
operation should fail and the withdraw_funds function should raise an Exception with a suitable e
or message
which is caught and displayed in the main.py file where the operation was attempted.
All e
or messages such as those from exceptions should be displayed in a pop-up messagebox.
The get_transaction_string method should loop over all the transactions in the transaction_list creating a string
version (with newline characters) of all the transactions associated with the account.
The save_to_file function should save the account_number, pin_number, balance, and interest_rate in that
order to a file called .txt followed by the transaction list string generated from the
get_transaction_string() method. The name of the account file is NOT '.txt' - the name of
the file is the ACTUAL ACCOUNT NUMBER followed by ".txt", so for an account with account_number 123456
the name of the account file would be XXXXXXXXXXtxt.
A full ‘walk-through’ video demonstrating the completed application and how it operates will be provided along
with this assignment document.
BankAccount
account_number: int
pin_number: string
alance: float
interest_rate: float
transaction_list: list of two-tuples
deposit_funds(amount)
withdraw_funds(amount)
get_transaction_string()
save_to_file()
ITECH1400 – Foundations of Programming
School of Science, Engineering and Information Technology
CRICOS Provider No. 00103D Page 3 of 10
Calculating Interest
To make it worthwhile for you to keep your money with a bank, the bank offers you an interest rate on your
savings. Interest will be applied to the balance of an account once per month.
Let’s do an example – suppose you had $10,000 in a bank account and the bank paid you monthly interest at a
ate of 3% per year. That would mean the bank pays you 3% of your balance divided by 12 (because there are
12 months in a year) per month. If we start our example on January and run it for a few months (and we don’t
deposit or withdraw any money throughout the year) then we end up with our bank balance changing like this:

Note: 3% divided by 12 is 0.25% per month – so we’ll multiply our balance by XXXXXXXXXXto get the new balance.
Jan Feb Mar Apr May Jun Jul Aug Etc.
10, XXXXXXXXXX, XXXXXXXXXX, XXXXXXXXXX, XXXXXXXXXX, XXXXXXXXXX, XXXXXXXXXX, XXXXXXXXXX,176.32 …

What’s happening here is that the interest is compounding – which just means that we get that 0.25% applied
not only to our principle balance (i.e. the $10,000 we started with), but it also gets applied to the interest we
earnt. Although 3% interest is very low (but in line with the best rates you’d get in Australia at the moment
ecause interest rates are very low), over time this compounding makes a serious difference!
Because FedUni Bank is the greatest bank of all time, it offers all accounts an interest rate of 33%.
The Main Python Script
Our main.py script will contain all the main logic for our program. It will allow us to:
- Enter an account number via an Entry field by using the keyboard,
- Enter a PIN number via an Entry widget (we can use the keyboard OR a series of buttons to enter the
PIN),
- Once we are logged in we must be able to:
o See the balance of our account,
o Deposit funds into our account,
o Withdraw funds from our account (only up to the amount we have available),
o Display a plot of our projected interest over the next 12 months as outlined above, and finally
o Log out of our account.
Every time a successful deposit or withdrawal is made then a new transaction should be added to the account's
transaction list. When we log out then the account file is overwritten with the new account details including
our new balance and any transactions if any have been made.
The format of the account text file is as follows (each value on separate lines):
account_number
account_pin
alance
interest_rate
ITECH1400 – Foundations of Programming
School of Science, Engineering and Information Technology
CRICOS Provider No. 00103D Page 4 of 10
For example, account number XXXXXXXXXXwith PIN 7890 and a balance of $800 with an interest rate of 33% would
look like this:
123456
7890
800.00
0.33

After these first four lines we may have a number of transactions, each of which is specified as two lines. A
deposit is indicated by the word Deposit on one line and then the amount on the next like. For example a
deposit of $500 would look like this:
Deposit
500.00

Similarly, a withdrawal is also specified as two lines – first the word Withdrawal and then on the next line the
amount, for example a withdrawal of $200 would look like this:
Withdrawal
200.00

You are provided with an example bank account file called XXXXXXXXXXtxt – this file along with others will be
used to mark your assessment, so you should make sure that your final submission can use bank accounts in
this format successfully.
You are also provided with a video demonstration of the completed assignment along with this document. Your
application should match this user interface and function in the same way.
Login Screen
When the application is first launched, it should open a window that is "440x640" pixels in size (use the window
object’s geometry function to set this). Set the title of the window to "FedUni Banking" using the top-level
window object's winfo_toplevel().title() function.
The window uses the GridManager layout manager for placing GUI elements (e.g. 'widgets'), it contains a Label
that spans the top of the window saying "FedUni Banking" (font size is 32). On the next line is a label saying
"Account Number" and then an Entry widget for the user to type in their account number and an Entry for the
PIN number.
It then has a series of buttons from 0 through 9, along with a Log In button and a Clea
Cancel button.
Each time a number is pressed it is added to a string - for example, if the user pushed the 4 button then the 3
utton then the 2 button and then the 1 button then the string should contain the text "4321". By using the
show="*" attribute you can 'mask' the input so that anyone looking over your shoulder cannot see the exact
pin number, they'll just see "****" instead. When the Clea
Cancel button is pressed, or when a user "logs out"
then this PIN string should be reset to an empty string.
When the Log In button is pressed then the program should attempt to open the file with the account number
followed by ".txt" - so in the example below, because the account number entered was "123456", the program
will attempt to open the file "123456.txt".
ITECH1400 – Foundations of Programming
School of Science, Engineering and Information Technology
CRICOS Provider No. 00103D Page 5 of 10
If that file could not be opened then a messagebox should
Answered Same Day May 29, 2020 ITECH1400

Solution

Abr Writing answered on May 31 2020
140 Votes
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