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A Python Framework for writing Reactive web Front-Ends

Project description

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Starfyre ⭐🔥


Starfyre is a library that allows you to build reactive frontends using only Python. With Starfyre, you can create interactive, real-time applications with minimal effort. Simply define your frontend as a collection of observables and reactive functions, and let Starfyre handle the rest. Starfyre is based on Pyscript for client side functions and uses the concept of pyxides when structuring code.

  • pyxide - translates to a container. Every component is a container. It can contain other components or HTML elements.

📦 Installation:

pip install starfyre

A sample project is hosted on GitHub.

🚀 Sample App

To create an application

python3 -m starfyre --create="my-app"

It will use the create-starfyre-app as the template to create a new project.

A simple component


import "../styles/index.css"

def message():
  return "World"

import js

def handle_click():
  js.console.log("Hello World")

  <div onclick={handle_click()}>
    Hello, {message()}

Using Components

Click to expand


import "../styles/index.css"
from @.components.custom_component import custom_component
# @ is the alias for the source directory. e.g. my-app in our case



  <div> This is a custom component </div>

State Management

Click to expand

Signals are super early at this moment. You need to have the word "signal" when declaring a variable. e.g. get_signal, set_signal, use_signal. And use_signal and get_signal can't be evaluated on the client, i.e. can't have {use_signal()+1}. This will be fixed with a better serialization.



[get_signal, set_signal, use_signal] = create_signal("Hello World")

def handle_click():
  set_signal("Goodbye World")

  <div onclick={handle_click}>


File based Routing

Starfyre supports file based routing.

├── pages
│   ├── __init__.fyre
│   ├── about.fyre
│   └── nav.fyre


Click to expand

Starfyre supports CSS and file based css.

import "../styles/index.css"

.component {
/* CSS here */


  <div class="component"> Hello World </div>

🚀 Sample CLI usage

Usage: python -m starfyre [OPTIONS]

  Command-line interface to compile and build a Starfyre project.


      path (str): Path to the project directory.

      build (bool): Whether to start the build package.

      create (str): Name of the project to create.

      serve (bool): Whether to serve the project.

  --path TEXT    Path to the project. Requires --build.
  --build        Compile and build package. Requires --path.
  --create TEXT  Create a new project. Requires a project name.
  --serve        Serve the project. Requires --path.
  --help         Show this message and exit.

🗒️ How to contribute

🏁 Get started

Please read the code of conduct and go through before contributing to Starfyre. Feel free to open an issue for any clarifications or suggestions.

If you're feeling curious. You can take a look at a more detailed architecture here.

If you still need help to get started, feel free to reach out on our community discord.

⚙️ Developing Locally

  1. Fork this repo
  2. Clone this repo - git clone
  3. Go in to the starfyre directory - cd starfyre
  4. Download poetry curl -sSL | python3 -
  5. Install the dependencies poetry install
  6. Activate poetry virtual environment poetry shell
  7. Run the script ./ This command will run the build process in starfyre against the test application in test-application directory.
  • The file is a simple script that runs two commands sequentially.
    • python -m starfyre --build=True --path="test_application/"
      • The path variable here is the path to our application.
      • The build directory is basically a python package that contains all the compiled files. We use the --build flag to run that package.
  1. You can find a small test application in the test_application directory.
  2. Navigate to cd test_application/dist.
  3. Open index.html in your browser to see the output.


Feel free to open an issue and let me know what you think of it.

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