Here is my Python Code(Run on VisualCode) def read_user_information(): usernames = [] passwords = [] balances = [] with open("UserInformation.txt", "r") as file: lines = file.readlines() for line in lines[2:]: data = line.strip().split() usernames.append(data[0]) passwords.append(data[1]) balances.append(float(data[2])) return usernames, passwords, balances def write_user_information(usernames, passwords, balances): with open("UserInformation.txt", "w") as file: file.write("userName passWord Balance\n") file.write("========================\n") for i in range(len(usernames)): file.write(f"{usernames[i]:<12} {passwords[i]:<12} {balances[i]:<}\n") def login(usernames, passwords): username_input = input("Enter username: ") password_input = input("Enter password: ") if username_input in usernames: index = usernames.index(username_input) if password_input == passwords[index]: return index print("Invalid username or password. Please try again.") return None def deposit(balances, user_index): amount = float(input("Enter the amount to deposit: ")) balances[user_index] += amount print(f"Deposit successful. New balance: ${balances[user_index]:.2f}") def withdraw(balances, user_index): amount = float(input("Enter the amount to withdraw: ")) if amount > balances[user_index]: print("Insufficient funds. Withdrawal failed.") else: balances[user_index] -= amount print(f"Withdrawal successful. New balance: ${balances[user_index]:.2f}") def show_balance(balances, user_index): print(f"Current balance for {usernames[user_index]}: ${balances[user_index]:.2f}") def change_user(): new_user = input("Enter new username: ") return new_user def add_new_user(usernames, passwords, balances): new_username = input("Enter new username: ") new_password = input("Enter new password: ") new_balance = float(input("Enter initial balance: ")) usernames.append(new_username) passwords.append(new_password) balances.append(new_balance) print(f"New user {new_username} added with balance: ${new_balance:.2f}") def main(): global usernames # Declare usernames as a global variable usernames, passwords, balances = read_user_information() while True: user_index = login(usernames, passwords) if user_index is not None: while True: print("\nMenu:") print("Type D to deposit money") print("Type W to withdraw money") print("Type B to display balance") print("Type C to change user, display username") print("Type A to add new client") print("Type E to exit") option = input("Enter your choice: ") if option == 'D': deposit(balances, user_index) show_balance(balances, user_index) elif option == 'W': show_balance(balances, user_index) withdraw(balances, user_index) show_balance(balances, user_index) elif option == 'B': show_balance(balances, user_index) elif option == 'C': user_index = login(usernames, passwords) if user_index is not None: print(f"Switched to user: {usernames[user_index]}") elif option == 'A': add_new_user(usernames, passwords, balances) elif option == 'E': write_user_information(usernames, passwords, balances) print("Exiting program. User information updated.") return else: print("Invalid option. Please try again.") if __name__ == "__main__": main() and here is the error message it pops u Traceback (most recent call last): File "c:\Users\Student\Downloads\Python\Final Project.py", line 116, in main() File "c:\Users\Student\Downloads\Python\Final Project.py", line 75, in main usernames, passwords, balances = read_user_information() ^^^^^^^^^^^^^^^^^^^^^^^ File "c:\Users\Student\Downloads\Python\Final Project.py", line 6, in read_user_information with open("UserInformation.txt", "r") as file: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ FileNotFoundError: [Errno 2] No such file or directory: 'UserInformation.txt' Can you explain and fix my code please thank you.

Here is my Python Code(Run on VisualCode) def read_user_information(): usernames = [] passwords = [] balances = [] with open("UserInformation.txt", "r") as file: lines = file.readlines() for line in lines[2:]: data = line.strip().split() usernames.append(data[0]) passwords.append(data[1]) balances.append(float(data[2])) return usernames, passwords, balances def write_user_information(usernames, passwords, balances): with open("UserInformation.txt", "w") as file: file.write("userName passWord Balance\n") file.write("========================\n") for i in range(len(usernames)): file.write(f"{usernames[i]:<12} {passwords[i]:<12} {balances[i]:<}\n") def login(usernames, passwords): username_input = input("Enter username: ") password_input = input("Enter password: ") if username_input in usernames: index = usernames.index(username_input) if password_input == passwords[index]: return index print("Invalid username or password. Please try again.") return None def deposit(balances, user_index): amount = float(input("Enter the amount to deposit: ")) balances[user_index] += amount print(f"Deposit successful. New balance: ${balances[user_index]:.2f}") def withdraw(balances, user_index): amount = float(input("Enter the amount to withdraw: ")) if amount > balances[user_index]: print("Insufficient funds. Withdrawal failed.") else: balances[user_index] -= amount print(f"Withdrawal successful. New balance: ${balances[user_index]:.2f}") def show_balance(balances, user_index): print(f"Current balance for {usernames[user_index]}: ${balances[user_index]:.2f}") def change_user(): new_user = input("Enter new username: ") return new_user def add_new_user(usernames, passwords, balances): new_username = input("Enter new username: ") new_password = input("Enter new password: ") new_balance = float(input("Enter initial balance: ")) usernames.append(new_username) passwords.append(new_password) balances.append(new_balance) print(f"New user {new_username} added with balance: ${new_balance:.2f}") def main(): global usernames # Declare usernames as a global variable usernames, passwords, balances = read_user_information() while True: user_index = login(usernames, passwords) if user_index is not None: while True: print("\nMenu:") print("Type D to deposit money") print("Type W to withdraw money") print("Type B to display balance") print("Type C to change user, display username") print("Type A to add new client") print("Type E to exit") option = input("Enter your choice: ") if option == 'D': deposit(balances, user_index) show_balance(balances, user_index) elif option == 'W': show_balance(balances, user_index) withdraw(balances, user_index) show_balance(balances, user_index) elif option == 'B': show_balance(balances, user_index) elif option == 'C': user_index = login(usernames, passwords) if user_index is not None: print(f"Switched to user: {usernames[user_index]}") elif option == 'A': add_new_user(usernames, passwords, balances) elif option == 'E': write_user_information(usernames, passwords, balances) print("Exiting program. User information updated.") return else: print("Invalid option. Please try again.") if name == "main": main() and here is the error message it pops u Traceback (most recent call last): File "c:\Users\Student\Downloads\Python\Final Project.py", line 116, in main() File "c:\Users\Student\Downloads\Python\Final Project.py", line 75, in main usernames, passwords, balances = read_user_information() ^^^^^^^^^^^^^^^^^^^^^^^ File "c:\Users\Student\Downloads\Python\Final Project.py", line 6, in read_user_information with open("UserInformation.txt", "r") as file: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ FileNotFoundError: [Errno 2] No such file or directory: 'UserInformation.txt' Can you explain and fix my code please thank you.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

Here is my Python Code(Run on VisualCode)

def read_user_information():

usernames = []

passwords = []

balances = []

with open("UserInformation.txt", "r") as file:

lines = file.readlines()

for line in lines[2:]:

data = line.strip().split()

usernames.append(data[0])

passwords.append(data[1])

balances.append(float(data[2]))

return usernames, passwords, balances

def write_user_information(usernames, passwords, balances):

with open("UserInformation.txt", "w") as file:

file.write("userName passWord Balance\n")

file.write("========================\n")

for i in range(len(usernames)):

file.write(f"{usernames[i]:<12} {passwords[i]:<12} {balances[i]:<}\n")

def login(usernames, passwords):

username_input = input("Enter username: ")

password_input = input("Enter password: ")

if username_input in usernames:

index = usernames.index(username_input)

if password_input == passwords[index]:

return index

print("Invalid username or password. Please try again.")

return None

def deposit(balances, user_index):

amount = float(input("Enter the amount to deposit: "))

balances[user_index] += amount

print(f"Deposit successful. New balance: ${balances[user_index]:.2f}")

def withdraw(balances, user_index):

amount = float(input("Enter the amount to withdraw: "))

if amount > balances[user_index]:

print("Insufficient funds. Withdrawal failed.")

else:

balances[user_index] -= amount

print(f"Withdrawal successful. New balance: ${balances[user_index]:.2f}")

def show_balance(balances, user_index):

print(f"Current balance for {usernames[user_index]}: ${balances[user_index]:.2f}")

def change_user():

new_user = input("Enter new username: ")

return new_user

def add_new_user(usernames, passwords, balances):

new_username = input("Enter new username: ")

new_password = input("Enter new password: ")

new_balance = float(input("Enter initial balance: "))

usernames.append(new_username)

passwords.append(new_password)

balances.append(new_balance)

print(f"New user {new_username} added with balance: ${new_balance:.2f}")

def main():

global usernames # Declare usernames as a global variable

usernames, passwords, balances = read_user_information()

while True:

user_index = login(usernames, passwords)

if user_index is not None:

while True:

print("\nMenu:")

print("Type D to deposit money")

print("Type W to withdraw money")

print("Type B to display balance")

print("Type C to change user, display username")

print("Type A to add new client")

print("Type E to exit")

option = input("Enter your choice: ")

if option == 'D':

deposit(balances, user_index)

show_balance(balances, user_index)

elif option == 'W':

show_balance(balances, user_index)

withdraw(balances, user_index)

show_balance(balances, user_index)

elif option == 'B':

show_balance(balances, user_index)

elif option == 'C':

user_index = login(usernames, passwords)

if user_index is not None:

print(f"Switched to user: {usernames[user_index]}")

elif option == 'A':

add_new_user(usernames, passwords, balances)

elif option == 'E':

write_user_information(usernames, passwords, balances)

print("Exiting program. User information updated.")

return

else:

print("Invalid option. Please try again.")

if __name__ == "__main__":

main()

and here is the error message it pops u

Traceback (most recent call last):
File "c:\Users\Student\Downloads\Python\Final Project.py", line 116, in <module>
main()
File "c:\Users\Student\Downloads\Python\Final Project.py", line 75, in main
usernames, passwords, balances = read_user_information()
^^^^^^^^^^^^^^^^^^^^^^^
File "c:\Users\Student\Downloads\Python\Final Project.py", line 6, in read_user_information
with open("UserInformation.txt", "r") as file:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'UserInformation.txt'

Can you explain and fix my code please thank you.

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