Python Essentials is a comprehensive learning repository designed to take you from writing your first line of code to building database-backed applications. It documents a structured journey through core Python concepts, logic building, and real-world implementation.

The code is organized into progressive modules, making it easy to navigate through different concepts:

• 01 Basics: Syntax, comments, and running programs.
• 02 Conditionals: Decision making with if, elif, else.
• 03 Loops: Iteration using for and while loops.
• 04 Functions: Reusable code blocks, arguments, and return values.
• 05 Scopes: Understanding local vs. global scope.
• 06 OOP: Object-Oriented Programming principles.
• 07 Decorators: Enhancing functions with decorators.

• 08 Python Project (File Handling): A CLI-based YouTube Manager app that allows users to CRUD (Create, Read, Update, Delete) video details using a local JSON file (youtube.txt).
• 09 Database (SQLite3): An evolution of the YouTube Manager that persists data using Python's built-in sqlite3 module.
• 10 Handling APIs: Scripts demonstrating how to interact with external APIs (e.g., fetching random user data).
• 11 YouTube Manager (MongoDB): An advanced version of the manager app connecting to a cloud-based MongoDB cluster using pymongo.

This repository features three iterations of a "YouTube Video Manager" to demonstrate data persistence evolution:

1. File-Based: Uses json module to save data to a text file.
2. SQL-Based: Implements a relational database schema (videos table) with sqlite3.
3. NoSQL-Based: Connects to MongoDB Atlas to manage documents in a ytmanager database.

• Python 3.x installed.
• pymongo installed (for Module 11).

1. Clone the repository:

   git clone [https://github.com/pushtikadia/Python-Essentials.git](https://github.com/pushtikadia/Python-Essentials.git)

2. Navigate to the directory:

   cd Python-Essentials

3. Install dependencies (for MongoDB project):

   pip install pymongo

4. Run a script:

   python "08_python_project/youtube_manager.py"

• Language: Python 3
• Databases: SQLite3, MongoDB (NoSQL)
• Libraries: json, sqlite3, pymongo, requests (for APIs)

Created by Pushti Kadia