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requirements

The file named requirements.txt is used in Python projects to list all the Python packages and their specific versions required for the project to run correctly. It is typically used with package managers like pip to install dependencies.

Purpose​

  1. Dependency Management: The file ensures that the exact versions of required libraries are installed, avoiding version conflicts and ensuring consistency across environments.
  2. Reproducibility: It allows others to easily replicate the project's environment by running: 
    pip install -r requirements.txt

Contents of the File​

The file contains a list of libraries along with their versions.

  • Web Framework:

    • fastapi==0.115.5: A modern, fast (high-performance) web framework for building APIs with Python.
    • uvicorn==0.32.1: An ASGI server implementation used to serve FastAPI applications.
    • starlette==0.41.3: A lightweight ASGI framework that FastAPI is built upon.

  • HTTP Handling:

    • requests==2.32.3: A widely used library for making HTTP requests.
    • httpx==0.28.0: An HTTP client with async support, often used with FastAPI.
    • httpcore==1.0.7: The core HTTP library that powers httpx.

  • Validation:

    • pydantic==2.10.2: A data validation and settings management library used heavily in FastAPI.
    • email_validator==2.2.0: Used to validate email addresses.

  • Server Optimization:

    • uvloop==0.21.0: A faster implementation of the event loop, improving server performance.
    • watchfiles==1.0.0: A file-watching library, often used for reloading during development.

  • Logging and Debugging:

    • rich==13.9.4: A library for beautiful terminal output.
    • coloredlogs==15.0.1: Enhances logging output with colors.
    • colorlog==6.9.0: Provides colorized logs.

  • Templating and YAML:

    • Jinja2==3.1.4: A template engine for rendering HTML or other formats.
    • PyYAML==6.0.2: A library to parse and write YAML files.

  • Networking and URL Handling:

    • idna==3.10: For Internationalized Domain Names in Applications.
    • urllib3==2.2.3: A core library for handling URL requests.
    • dnspython==2.7.0: For DNS handling.

  • CLI Utilities:

    • click==8.1.7: A library for creating command-line interfaces.
    • typer==0.14.0: Builds on click and integrates with FastAPI.

  • Environment Variables:

    • python-dotenv==1.0.1: Reads environment variables from .env files.

  • Other Utilities:

    • typing_extensions==4.12.2: Backports for typing features not in standard libraries.
    • annotated-types==0.7.0: Supports annotated types for better validation.

How to Use It​

  1. Install Dependencies: Run the following command to install the required packages:

    pip install -r requirements.txt

  2. Virtual Environment: It is recommended to use a virtual environment to keep dependencies isolated:

    python -m venv venv
    source venv/bin/activate  # On Windows: venv\Scripts\activate
    pip install -r requirements.txt

  3. Running the Application:

    • This file supports a FastAPI-based project. You can likely run the server using: 
      uvicorn main:app --reload

    Replace main:app with the actual module and application name.