Quart is an asynchronous web microframework based on the Flask application programming interface. It provides a familiar development model for building web applications that need asynchronous request processing and real-time communication.
The framework follows Flask’s approach to defining routes, handling requests and rendering templates. Developers familiar with Flask can reuse much of their existing knowledge while taking advantage of asynchronous libraries and non-blocking operations.
Quart supports traditional websites alongside JSON APIs, streaming services and WebSocket applications. Its compatibility with Flask also allows many existing Flask extensions and application patterns to be used, although individual extensions may require adaptation.
This is free and open source software.
Key Features
- Asynchronous HTTP request handling with a Flask-compatible programming interface.
- WebSocket routes supporting bidirectional communication.
- HTTP streaming for request and response bodies.
- Support for HTTP/1.1, HTTP/2 and ASGI-compatible application servers.
- Jinja template rendering for dynamic HTML pages.
- Blueprints for organising routes, views and application resources.
- Request and application contexts for managing request-specific information.
- Signed cookie sessions, request cookies and configurable session storage.
- Background task support integrated with the application lifecycle.
- Server-Sent Events for streaming updates to browser clients.
- Request parsing for forms, JSON payloads and uploaded files.
- Middleware integration and custom HTTP error handlers.
- Application startup and shutdown functions for managing shared resources.
- Asynchronous testing utilities for HTTP requests and WebSocket connections.
- Compatibility with many Flask extensions and application patterns.
Website: github.com/pallets/quart
Support:
Developer: P G Jones
License: MIT License
Quart is written in Python. Learn Python with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
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