🏦 Python Bank Management System

A simple and beginner-friendly Bank Management System in Python using Object-Oriented Programming (OOP) and File Handling (accounts.txt, transactions.txt).
This project supports account creation, secure login, deposits, withdrawals, and full transaction history tracking.

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🚀 Features

✔ Create New Account

• User name input
• 5-digit numeric password validation
• Auto-generated 5-digit unique account number
• Initial deposit stored in both account file & transaction history

✔ Login to Existing Account

• Password protected
• Loads accounts from accounts.txt
• Prevents login until account is saved in memory

✔ Deposit & Withdraw Money

• Updates account balance
• Saves each transaction in transactions.txt
• Fully recorded with date & time

✔ Check Balance

• Shows current balance instantly

✔ Transaction History

• Displays all deposits & withdrawals for that specific account
• Reads from transactions.txt

✔ Persistent Storage

• accounts.txt → stores all accounts
• transactions.txt → stores all transactions

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🛠 Technologies Used

• Python 3
• OOP (Classes & Objects)
• File Handling
• Datetime module

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📘 How It Works

1️⃣ Create Account

User enters name → password → initial deposit
Program generates unique 5-digit account number.

Stored in: accounts.txt transactions.txt

2️⃣ Login

User enters:

• Account Number
• Password

If matched → user menu opens.

3️⃣ Deposit / Withdraw / Balance Check

Each action updates:

• Memory (runtime)
• File storage
• Transaction record

4️⃣ Transaction History

Reads all lines from transactions.txt matching the account number.

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📝 Sample Transaction Format

40528 | Deposit | 5000 | 2025-11-12 21:30:45.923842 40528 | Withdraw | 1000 | 2025-11-12 22:00:01.312582