Create README.md with project overview and instructions

Added a comprehensive README with project details, structure, and contribution guidelines.

Author: imashwini09

README.md

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+# 🐍 code_python
+
+A comprehensive collection of Python code examples and tutorials covering core concepts, object-oriented programming, concurrency, design patterns, and more.
+
+---
+
+## 📁 Repository Structure
+
+| Folder | Description |
+|---|---|
+| [`Async_tutorial`](./Async_tutorial) | Asynchronous programming using `asyncio`, `async/await` patterns |
+| [`Exception_handling`](./Exception_handling) | Handling errors gracefully with try/except, custom exceptions |
+| [`Files`](./Files) | File I/O operations — reading, writing, and managing files |
+| [`Garbage_collection`](./Garbage_collection) | Python memory management and garbage collection internals |
+| [`Inheritance`](./Inheritance) | Class inheritance, method overriding, and MRO (Method Resolution Order) |
+| [`Iterators_and_Generators`](./Iterators_and_Generators) | Custom iterators, generator functions, and `yield` expressions |
+| [`Lambda_expression`](./Lambda_expression) | Anonymous functions, `map()`, `filter()`, and `reduce()` usage |
+| [`Pydantic_tutorial`](./Pydantic_tutorial) | Data validation and settings management using Pydantic |
+| [`Python_oops`](./Python_oops) | Object-Oriented Programming — classes, objects, encapsulation, polymorphism |
+| [`SOLID`](./SOLID) | SOLID design principles with Python examples |
+| [`Scalar`](./Scalar) | Scalar data types and operations |
+| [`Thread_tutorial`](./Thread_tutorial) | Multi-threading with the `threading` module |
+| [`Typing_Generics`](./Typing_Generics) | Type hints, generics, and the `typing` module |
+| [`absraction`](./absraction) | Abstraction using abstract base classes (`ABC`) |
+
+---
+
+## 🚀 Getting Started
+
+### Prerequisites
+
+- Python 3.8 or higher
+- pip (Python package manager)
+
+### Clone the Repository
+
+```bash
+git clone https://github.com/imashwini09/code_python.git
+cd code_python
+```
+
+### Install Dependencies
+
+Some modules (like Pydantic) may require additional packages:
+
+```bash
+pip install pydantic
+```
+
+### Run a Script
+
+Navigate to any topic folder and run the desired Python file:
+
+```bash
+cd Async_tutorial
+python <filename>.py
+```
+
+---
+
+## 📚 Topics Covered
+
+- **OOP Concepts** — Classes, Objects, Encapsulation, Inheritance, Polymorphism, Abstraction
+- **Design Principles** — SOLID principles in Python
+- **Concurrency** — Threading and Async/Await patterns
+- **Functional Programming** — Lambda expressions, iterators, generators
+- **Type Safety** — Type hints, generics, and Pydantic data validation
+- **File Handling** — Reading and writing files
+- **Memory Management** — Python garbage collection
+- **Error Handling** — Exception handling best practices
+
+---
+
+## 🛠️ Tech Stack
+
+- **Language:** Python 3.x
+- **Libraries:** Pydantic, asyncio, threading (standard library)
+- **CI/CD:** GitHub Actions (`.github/workflows`)
+
+---
+
+## 🤝 Contributing
+
+Contributions are welcome! Feel free to open an issue or submit a pull request if you'd like to add examples or improve existing ones.
+
+1. Fork the repository
+2. Create your feature branch (`git checkout -b feature/new-topic`)
+3. Commit your changes (`git commit -m 'Add new topic examples'`)
+4. Push to the branch (`git push origin feature/new-topic`)
+5. Open a Pull Request
+
+---
+
+## 📄 License
+
+This project is open source. Feel free to use and learn from the code.
+
+---
+
+> Made with ❤️ by [imashwini09](https://github.com/imashwini09)