Best Streamlit Bank Management System in Python

Bank Management System

Overview

Bank Management System is a simple yet secure digital banking app built with Python and Streamlit. It lets users create accounts, check balances, deposit money, withdraw funds, and manage their accounts — all through a clean and easy-to-use web interface.The system stores data locally in a JSON database, making it lightweight and perfect for learning or testing purposes. Its design keeps the user interface separate from the core banking logic and data handling, making the code easy to understand and maintain.

Project Information

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Available Features

• Account Creation – Instantly generate secure account numbers and create new accounts with essential user details.
• Deposit & Withdrawal – Perform transactions with real-time balance updates and validation rules for secure operations.
• Account Lookup – Retrieve account details securely using a personal PIN for verification.
• Update Account Info – Edit account holder’s name, age, email, or PIN after authentication.
• Delete Account – Remove accounts with confirmation and security checks.
• PIN Validation – Every operation is authenticated using the correct PIN.
• Persistent Data Storage – All account data is saved to a local data.json file for continuity.
• Streamlit-Based UI – A tabbed, user-friendly interface for smooth navigation between features.

Architecture

User Interface (Streamlit)
        │
        ▼
Banking Operations Module (Create, Edit, Delete, View)
        │
        ▼
JSON Data Handler (Persistent Storage)

This architecture ensures a clear separation between the UI and the backend logic, making the system easy to maintain and extend.

Installation

1. (Optional) Create a virtual environment python -m venv .venv source .venv/bin/activate # On Windows: .venv\Scripts\activate
2. Install dependencies pip install -r requirements.txt
3. Run the application streamlit run app.py
4. Access the dashboard
   • Open http://localhost:8501 in your browser.

Data Storage Format

Account data is stored in JSON with a structure like this:

{
  "Name": "John Doe",
  "Age": 30,
  "Email": "john@example.com",
  "AccountNo": "a9B3d81!2FjQ",
  "Pin": 1234,
  "balance": 5000
}

Each transaction instantly updates this local database.

Project Structure

one-to-one-bank/
│── app.py                # Main Streamlit application
│── main_code_no_UI.py    # Banking logic without UI
│── data.json             # Local JSON-based database
│── requirements.txt      # Python dependencies
│── assets/               # Images and banners

Acknowledgements

This project draws inspiration from real-world banking workflows for educational purposes. Built using:

• Streamlit for UI
• Python for backend logic
• JSON for persistent local storage

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