The "Bank Application" is a Python program that simulates basic banking operations. It allows users to create accounts, log in, check balances, deposit and withdraw money, and transfer funds to other accounts. This project is designed to help you practice your Python programming skills, database management, and basic security measures.
- Create Account: Users can create a new bank account by providing a unique username and password. Passwords are securely hashed using the SHA-256 algorithm before storage.
- Login: Account holders can log in with their usernames and passwords to access their accounts.
- Check Balance: Users can check their account balances.
- Deposit: Account holders can deposit money into their accounts.
- Withdraw: Users can withdraw money from their accounts, provided they have sufficient funds.
- Transfer: Account holders can transfer money to other accounts, ensuring secure fund transfer.
- The program uses an SQLite database to store account information, including usernames, hashed passwords, and account balances.
- User passwords are securely hashed using the SHA-256 algorithm before storage to enhance security.
- It includes a
BankAppclass that encapsulates the functionality of the application, making it organized and easy to maintain.
- Run the Python program.
- Select from the available options to create an account, log in, and perform banking operations.
This project serves as a practical exercise for intermediate Python programmers. It covers fundamental concepts such as working with databases, user authentication, and class-based application structure. By completing this project, you will improve your Python skills and gain experience in building secure applications.
To further expand and enhance this project, you can consider adding features like:
- User account management: Allow users to change passwords and update account information.
- Transaction history: Keep a record of all transactions for each account.
- Error handling: Implement robust error handling and validation to enhance security.
Feel free to explore and customize this project to suit your learning goals and interests. Happy coding!
import sqlite3
import hashlib
class BankApp:
def __init__(self, db_name):
self.conn = sqlite3.connect(db_name)
self.cursor = self.conn.cursor()
self.create_table()
def create_table(self):
self.cursor.execute('''
CREATE TABLE IF NOT EXISTS accounts (
id INTEGER PRIMARY KEY,
username TEXT,
password TEXT,
balance REAL
)
''')
self.conn.commit()
def user_already_exist(self):
username = input("Enter a username: ")
self.cursor.execute("SELECT username FROM accounts WHERE username = ?", (username))
account = self.cursor.fetchone()
if account:
print("Username already in use, use another new one")
self.user_already_exist()
else :
return username
def create_account(self,username,password):
hashed_password = hashlib.sha256(password.encode()).hexdigest()
self.cursor.execute("INSERT INTO accounts (username, password, balance) VALUES (?,?,?)",(username,hashed_password,0.0))
self.conn.commit()
print("Account created successfully.")
def login(self, username, password):
hashed_password = hashlib.sha256(password.encode()).hexdigest()
self.cursor.execute("SELECT * FROM accounts WHERE username=? AND password=?", (username, hashed_password))
account = self.cursor.fetchone()
return account
def check_balance(self, username):
self.cursor.execute("SELECT balance FROM accounts WHERE username=?", (username,))
balance = self.cursor.fetchone()
return balance[0]
def deposit(self, username, amount):
current_balance = self.check_balance(username)
new_balance = current_balance + amount
self.cursor.execute("UPDATE accounts SET balance=? WHERE username=?", (new_balance, username))
self.conn.commit()
def withdraw(self, username, amount):
current_balance = self.check_balance(username)
if amount > current_balance:
return "Insufficient balance"
new_balance = current_balance - amount
self.cursor.execute("UPDATE accounts SET balance=? WHERE username=?", (new_balance, username))
self.conn.commit()
def transfer(self, sender_username, receiver_username, amount):
sender_balance = self.check_balance(sender_username)
if amount > sender_balance:
return "Insufficient balance"
receiver_balance = self.check_balance(receiver_username)
new_sender_balance = sender_balance - amount
new_receiver_balance = receiver_balance + amount
self.cursor.execute("UPDATE accounts SET balance=? WHERE username=?", (new_sender_balance, sender_username))
self.cursor.execute("UPDATE accounts SET balance=? WHERE username=?", (new_receiver_balance, receiver_username))
self.conn.commit()
def close(self):
self.conn.close()
def main():
bank_app = BankApp("bank.db")
while True:
print("\nBank Application.md")
print("1. Create Account")
print("2. Login")
print("3. Exit")
choice = input("Select an operation: ")
if choice == "1":
username = bank_app.user_already_exist()
password = input("Enter a password: ")
bank_app.create_account(username, password)
elif choice == "2":
username = input("Enter your username: ")
password = input("Enter your password: ")
account = bank_app.login(username, password)
if account:
print("Login successful.")
while True:
print("\nAccount Menu")
print("1. Check Balance")
print("2. Deposit")
print("3. Withdraw")
print("4. Transfer")
print("5. Logout")
account_choice = input("Select an operation: ")
if account_choice == "1":
balance = bank_app.check_balance(username)
print(f"Balance: ${balance:.2f}")
elif account_choice == "2":
amount = float(input("Enter deposit amount: "))
bank_app.deposit(username, amount)
print("Deposit successful.")
elif account_choice == "3":
amount = float(input("Enter withdrawal amount: "))
result = bank_app.withdraw(username, amount)
if result == "Insufficient balance":
print("Insufficient balance.")
else:
print("Withdrawal successful.")
elif account_choice == "4":
receiver_username = input("Enter receiver's username: ")
amount = float(input("Enter transfer amount: "))
result = bank_app.transfer(username, receiver_username, amount)
if result == "Insufficient balance":
print("Insufficient balance.")
else:
print("Transfer successful.")
elif account_choice == "5":
break
else:
print("Login failed. Invalid username or password.")
elif choice == "3":
bank_app.close()
break
if __name__ == "__main__":
main()