Reactive Python Packages

influxdb-client

InfluxDB 2.0 python client

reactivex

ReactiveX for Python

rx

ReactiveX for Python

marimo

A reactive notebook for Python — run reproducible experiments, query with SQL, execute as a script, deploy as an app, and version with git. Stored as pure Python. All in a modern, AI-native editor.

djust

Phoenix LiveView-style reactive server-side rendering for Django with Rust-powered performance

csp

csp is a high performance reactive stream processing library, written in C++ and Python

python-redux

Redux implementation for Python

violit

Pure Python Web Framework. Streamlit simplicity, no reruns.

reacnetgenerator

an automatic reaction network generator for reactive molecular dynamics simulation

marimo-base

A library for making reactive notebooks and apps

hmr

Real hot-module reload for Python—side effects handled reactively. https://py3.online/hmr

spragkit

A unified Python web framework that compiles browser code to ESM JavaScript. Features symmetric lifecycle hooks, shared state stores, typed actions, and built-in realtime events (SSE/WebSockets).

graphrefly

Reactive harness layer for agent workflows. Describe automations in plain language, trace every decision, enforce policies, persist checkpoints. Python. Zero dependencies.

marimo-agents

A reactive notebook for Python — run reproducible experiments, query with SQL, execute as a script, deploy as an app, and version with git. Stored as pure Python. All in a modern, AI-native editor.

uvicorn-hmr

Real hot-module reload for Python—side effects handled reactively. https://py3.online/hmr

streamlit-notebook

A reactive notebook interface for Streamlit

csp-gateway

csp-gateway is a framework for building high-performance streaming applications

mcp-hmr

Real hot-module reload for Python—side effects handled reactively. https://py3.online/hmr

reactivepy

Reactive properties and owners for Python classes.

broqer

Carefully crafted library to operate with continuous streams of data in a reactive style with publish/subscribe, asyncio support and broker functionality.

opentui

Python bindings for OpenTUI - Build terminal UIs in Python

marimo-flow

Interactive ML notebooks with reactive updates, AI assistance, and MLflow tracking

puepy

Python+Webassembly Frontend Framework via PyScript

fastapi-reloader

Real hot-module reload for Python—side effects handled reactively. https://py3.online/hmr