Overview of a Common Directory Structure for a Python Flask Web App

This is a directory structure commonly used for a Python Flask web application, which is a microweb framework for Python. The structure helps keep the code organized and easy to understand, with separate directories for the main package, static assets, tests, and instance-specific configuration files. It also includes files for models, routes, templates, and dependencies.

myapp/
├── app/
│   ├── __init__.py
│   ├── models.py
│   ├── routes.py
│   └── templates/
│       ├── base.html
│       ├── home.html
│       └── error.html
├── instance/
│   └── config.py
├── static/
│   ├── css/
│   │   └── style.css
│   └── js/
│       └── script.js
├── tests/
│   ├── __init__.py
│   └── test_routes.py
├── venv/
├── .gitignore
├── README.md
└── requirements.txt

Here’s a brief explanation of each folder and file:

• myapp/: The root directory of the project.
  • app/: The main package for the Flask application.
    • __init__.py: The main entry point for the Flask application, it creates the Flask instance and registers blueprints.
    • models.py: Contains the models used in the application, such as database models or data classes.
    • routes.py: Contains the routes or views of the application, which handle HTTP requests and responses.
    • templates/: Contains the HTML templates used to render views.
      • base.html: The base template that other templates extend from.
      • home.html: An example template that might show the home page of the application.
      • error.html: An example template that might show an error page.
  • instance/: A directory for instance-specific configuration files.
    • config.py: A configuration file that contains instance-specific configuration variables, such as secret keys or database URLs.
  • static/: A directory for static assets, such as CSS stylesheets and JavaScript files.
    • css/: A directory for CSS stylesheets.
      • style.css: An example stylesheet that might be used in the application.
    • js/: A directory for JavaScript files.
      • script.js: An example JavaScript file that might be used in the application.
  • tests/: A directory for tests.
    • __init__.py: An empty file that makes the tests directory a package.
    • test_routes.py: A test file that contains unit tests for the routes defined in routes.py.
  • venv/: A directory for the virtual environment used to run the application.
  • .gitignore: A file that specifies files and directories that should be ignored by Git when committing changes.
  • README.md: A file that contains information about the project.
  • requirements.txt: A file that lists the Python packages and versions required by the application. This file can be used to install dependencies using pip.

Conclusion

This directory structure is for a Python Flask web app, a quick way to build web apps. It has organized folders for different parts of the app, making it easy to maintain and scale.