ITECH1400_Assignment_2/123456.txt 123456 7890 5000.0 0.33 Deposit 3000.0 Deposit 4000.0 Withdrawal 2000.0 ITECH1400_Assignment_2/bankaccount.py class BankAccount(): def __init__(self): '''Constructor...

123456.txt
123456
7890
5000.0
0.33
Deposit
3000.0
Deposit
4000.0
Withdrawal
2000.0
main.py
import tkinter as tk
from tkinter import messagebox
from pylab import plot, show, xlabel, ylabel
from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
from matplotlib.figure import Figure
from bankaccount import BankAccount
win = tk.Tk()
# Set window size here to '440x640' pixels
win.geometry('440x640')
# Set window title here to 'FedUni Banking'
win.title('FedUni Banking')
# The account number entry and associated variable
account_number_var = tk.StringVar()
account_number_entry = tk.Entry(win, textvariable=account_number_var)
account_number_entry.focus_set()
# The pin number entry and associated variable.
# Note: Modify this to 'show' PIN numbers as asterisks (i.e. **** not 1234)
pin_number_var = tk.StringVar()
account_pin_entry = tk.Entry(win, text='PIN Number', textvariable=pin_number_var, show='*')
# The balance label and associated variable
alance_var = tk.StringVar()
alance_var.set('Balance: $0.00')
alance_label = tk.Label(win, textvariable=balance_var)
# The Entry widget to accept a numerical value to deposit or withdraw
amount_entry = tk.Entry(win)
# The transaction text widget holds text of the accounts transactions
transaction_text_widget = tk.Text(win, height=10, width=48)
# The bank account object we will work with
account = BankAccount()
# ---------- Button Handlers for Login Screen ----------
def clear_pin_entry(event):
'''Function to clear the PIN number entry when the Clear / Cancel button is clicked.'''
# Clear the pin number entry here
pin_number_var.set('')
def handle_pin_button(event):
'''Function to add the number of the button clicked to the PIN number entry via its associated variable.'''
# Limit to 4 chars in length
pin = account_pin_entry.get()
# Set the new pin number on the pin_number_va
if len(pin) < 4:
pin_number_var.set(pin+str(event))
def log_in(event):
'''Function to log in to the banking system using a known account number and PIN.'''
global account
global pin_number_va
global account_number_entry
# Create the filename from the entered account number with '.txt' on the end
# Try to open the account file for reading
try:
with open(account_number_entry.get()+'.txt') as f:
# Open the account file for reading
index = 0
# First line is account numbe
for line in f:
line = line.strip()
if index == 0:
account.account_number = line
# Second line is PIN number, raise exceptionk if the PIN entered doesn't match account PIN read
elif index == 1:
account.pin_number = line
if account.pin_number != pin_number_var.get():
raise Exception('Inco
ect PIN number')
# Read third and fourth lines (balance and interest rate)
elif index == 2:
account.balance = float(line)
elif index == 3:
account.interest_rate = float(line)
# Section to read account transactions from file - start an infinite 'do-while' loop here
elif index % 2 == 0:
temp = line
else:
account.transaction_list.append((temp, line))
# Attempt to read a line from the account file,
eak if we've hit the end of the file. If we
# read a line then it's the transaction type, so read the next line which will be the transaction amount.
# and then create a tuple from both lines and add it to the account's transaction_list
index += 1
# Close the file now we're finished with it

# Catch exception if we couldn't open the file or PIN entered did not match account PIN
except:
# Show e
or messagebox and & reset BankAccount object to default...
raise Exception('Account Not Found')
# ...also clear PIN entry and change focus to account number entry
pin_number_var.set('')
# Got here without raising an exception? Then we can log in - so remove the widgets and display the account screen
# ---------- Button Handlers for Account Screen ----------
create_account_screen()
def save_and_log_out():
'''Function to overwrite the account file with the cu
ent state of
the account object (i.e. including any new transactions), remove
all widgets and display the login screen.'''
global account
# Save the account with any new transactions
account.save_to_file()
# Reset the bank acount object

# Reset the account number and pin to blank
account_number_var.set('')
pin_number_var.set('')
# Remove all widgets and display the login screen again
remove_all_widgets()
create_login_screen()
def perform_deposit():
'''Function to add a deposit for the amount in the amount entry to the
account's transaction list.'''
global account
global amount_entry
global balance_label
global balance_va
# Try to increase the account balance and append the deposit to the account file
try:
# Get the cash amount to deposit. Note: We check legality inside account's deposit method
account.deposit_funds(amount_entry.get())
# Deposit funds

# Update the transaction widget with the new transaction by calling account.get_transaction_string()
# Note: Configure the text widget to be state='normal' first, then delete contents, then instert new
# contents, and finally configure back to state='disabled' so it cannot be user edited.
transaction_text_widget.configure(state='normal')
transaction_text_widget.delete(1.0, tk.END)
for transaction in account.get_transaction_string():
transaction_text_widget.insert(tk.END, transaction[0]+'\n')
transaction_text_widget.insert(tk.END, transaction[1]+'\n')
transaction_text_widget.configure(state="disabled")

# Change the balance label to reflect the new balance
balance_var.set('Balance: ${}'.format(account.balance))
# Clear the amount entry
amount_entry.delete(0, 'end')
...