mypy-playground

The mypy playground provides Web UI to run mypy in the sandbox: https://mypy-play.net

Features

• Web UI and sandbox for running mypy easily and safely
• Simple and nice editor with syntax highlighting and error reporting
• Share snippets with your friends using GitHub Gist

Development

1. Run docker compose up -d to start an app and Docker for running mypy
2. Run docker compose exec docker docker build --pull -t ymyzk/mypy-playground-sandbox:latest /sandbox/latest to build a Docker image
3. Open http://localhost:8000

Components

• app: Application server
• app/frontend: Frontend
• sandbox: Sandbox environments for running mypy

Configuration

Configurations are considered in the following order:

1. Environment variables
2. Dotenv file (.env )
3. Configuration file (config.toml)
4. Default configurations

Name	Type	Required	Description
DEBUG	bool	No	Enable debug mode (default: False)
PORT	int	No	Port number (default: 8080)
SANDBOX	str	No	Sandbox implementation to use (default: mypy_playground.sandbox.docker.DockerSandbox)
SANDBOX_CONCURRENCY	int	No	The number of running sandboxes at the same time (default: 3)
GA_TRACKING_ID	str	No	A tracking id for Google Analytics. If not specified, Google Analytics is disabled.
GITHUB_TOKEN	str	No	A token used to create gists
ENABLE_PROMETHEUS	bool	No	Enable Prometheus metrics endpoint (default: False)
MYPY_VERSIONS	list	No	List of mypy versions used by a sandbox (default: mypy latest:latest)
DOCKER_IMAGES	list	No	Docker images used by sandbox (default: latest:ymyzk/mypy-playground-sandbox:latest)
CLOUD_FUNCTIONS_BASE_URL	str	No	URL of Cloud Functions without function name
CLOUD_FUNCTIONS_NAMES	str	No	Map from mypy version ID to name of Cloud Functions
CLOUD_FUNCTIONS_IDENTITY_TOKEN	str	No	Identity token for development purpose

Endpoints

• /: Entrypoint
• /api/: APIs provided by FastAPI
• /private/metrics: Prometheus metrics (when enabled)
• /static/: Static files

Sponsoring

mypy Playground is looking for sponsors to host mypy-play.net using GitHub sponsors

Development of mypy Playground is supported by JetBrains software. See https://jb.gg/OpenSourceSupport for more details.