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Welcome to PyFyre’s documentation!

PyFyre is a fast, declarative, and incrementally adoptable Python web frontend framework for building reactive web user interfaces.

Features

  • Component-based framework. Developers who have experience in using other frontend frameworks should feel quite at home when using PyFyre.

  • Truly reactive. PyFyre’s virtual DOM allows for simple and efficient state management.

  • Quick navigation. Navigation between pages is quick with PyFyre’s single-page application design.

  • Pythonic code with static typing. Developing with PyFyre is much easier with its type hinting and Pythonic style of coding.

  • Asynchronous programming. Run non-blocking functions out of the box.

  • CPython interoperability. Developers can limitedly use CPython packages on the client-side web.

  • JavaScript interoperability. Allowing developers to leverage NPM packages and integrate with existing JavaScript applications.

  • Pure Python. Build web apps without ever touching other languages like HTML and JavaScript.

  • And more!

Example

See the examples for more. If you want to quickly test how PyFyre feels or looks like, try our playground! But here is a super simple example. See how easy it is to create a simple Hello World web app with PyFyre:

from pyfyre import render
from pyfyre.nodes import Node, Widget, Element, Text


class HelloWorld(Widget):
    def build(self) -> list[Node]:
        return [Element("p", lambda: [Text("Hello, World!")])]


render({"/": lambda: HelloWorld()})
output

Want to jump right in?

Feeling like an eager beaver? Jump in to the quick start docs:

Quick Start

Implementation

PyFyre is built on top of Brython (Browser Python), a Python 3 implementation for client-side web programming. Brython allows Python code to be executed on the client-side browser. Anything you can do with JavaScript, you can also do with Python using Brython. Brython’s speed of execution is similar to CPython for most operations. If you want to deep dive into how Brython works under the hood, check this out.

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Contents

References

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