Refast

Python + React UI Framework for Building Reactive Web Applications

Refast is a framework that enables building reactive web applications with Python-first development. It uses FastAPI for the backend and React with shadcn/ui for the frontend.

Features

• Python-First Development: Build your UI logic entirely in Python
• Reactive Components: Real-time updates via WebSocket
• shadcn/ui Integration: Beautiful, accessible components out of the box
• FastAPI Integration: Plug into any existing FastAPI application
• Type Safety: Full type hints and Pydantic validation throughout

Installation

pip install refast

Quick Start

from refast import RefastApp, Context

ui = RefastApp(title="My App")

@ui.page("/")
def home(ctx: Context):
    return Container(
        Text("Hello, World!"),
        Button("Click me", on_click=ctx.callback(handle_click))
    )

async def handle_click(ctx: Context):
    await ctx.show_toast("Button clicked!")

# Mount to FastAPI
from fastapi import FastAPI
app = FastAPI()
app.include_router(ui.router, prefix="/ui")

Development

# Install with dev dependencies
pip install -e ".[dev]"

# Run tests
pytest tests/

# Run linting
ruff check src/

License

MIT