DummyDB

DummyDB is a lightweight, in-memory Python database for testing, prototyping, and mocking database operations without installing any external database servers.

It mimics the basic behavior of real databases like MongoDB or SQLite but runs entirely in memory. Ideal for developers who want fast CRUD operations without setup overhead.

Features

• In-memory storage (no installation required)
• Table creation and management
• CRUD operations: insert, find, update, delete
• Save and load database to JSON
• Lightweight and zero-dependency
• Perfect for unit testing, demos, and small projects

Installation

pip install dummydb

Functions

> insert(data: dict)
> find(query: dict)
> update(query: dict, new_data: dict)
> delete(query: dict)
> to_json()
> create_table(name: str)
> get_table(name: str)
> drop_table(name: str)
> save_to_file(filepath: str)
> load_from_file(filepath: str)

Example Usage

    from dummydb import Database

    # Create a database
    db = Database()

    # Create a table
    users = db.create_table("users")

    # Insert records
    users.insert({"name": "Vibhakar", "age": 17})
    users.insert({"name": "Shiju", "age": 16})

    # Query records
    print(users.find({"age": 17}))

    # Update records
    users.update({"name": "Shiju"}, {"age": 17})

    # Delete records
    users.delete({"name": "Vibhakar"})

    # Save/load
    db.save_to_file("dummydb.json")
    db.load_from_file("dummydb.json")