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A Python Framework for writing Reactive web Front-Ends

Project description

Starfyre Logo


Starfyre ⭐🔥


Starfyre is a library that allows you to build reactive frontends using only Python. It is built using pyodide and wasm, which enables it to run natively in the browser. 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.

Please note that Starfyre is still very naive and may be buggy, as it was developed in just five days. However, it is under active development and we welcome contributions to improve it. Whether you are a seasoned web developer or new to frontend development, we hope that you will find Starfyre to be a useful tool. Its intuitive API and simple, declarative style make it easy to get started, and its powerful features allow you to build sophisticated applications.

📦 Installation:

pip install starfyre

A sample project is hosted on GitHub.

🚀 Sample App


from .parent import parent
from .store import store

def mocked_request():
  return "fetched on the server"

async def handle_on_click(e):
  alert("click rendered on client")
  if 1==1:
    print("Hello world")

  current_value = get_parent_signal()
  set_parent_signal(current_value + 1)
  a = await fetch('')
  print(await a.text())
  print("handles on click")

  body {
    background-color: red;

    <parent hello='world'>
        <span onclick={handle_on_click}>
          {[ mocked_request() for i in range(4)]}

// this is the optional section 
// for third party scripts and custom js

🚀 Sample CLI usage

Usage: python -m starfyre [OPTIONS]

  --path TEXT      Path to the project
  --dev BOOLEAN    Start the compilation and generate the build package.
  --build BOOLEAN  Start the build package
  --help           Show this message and exit.

🗒️ How to contribute

🏁 Get started

Please read the code of conduct and go through before contributing to Robyn. 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

Python version 3.10

  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 enviromente 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 --dev=True --path="test-application/"
    • python -m starfyre --build=True --path="test-application/"
      • The path variable here is the path to our application.
      • The dev flag here is used to start the compilation and create the build directory.
      • 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, run explorer.exe index.html.

Running the sample app with Docker

Ideally, we should not be needing this. But if you are having trouble running the sample app locally, you can try this.

  1. Build the image docker build --tag starfyre .
  2. Run the container docker run -v ./test-application:/app/test-application/ starfyre
  3. Check the test-application directory for build and dist directories that contain the outputs
  4. If you would like to develop interactively inside the container, run docker run -it -v ./test-application:/app/test-application/ starfyre bash


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

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