# ReactiveX/RxPY

ReactiveX for Python

Repository: https://github.com/ReactiveX/RxPY
Canonical: https://ross.abutalabs.com/products/rxpy
Homepage: https://rxpy.rtfd.io
Language: Python
License: MIT
License Family: permissive
Topics: python, reactive, reactivex, reactive-extensions, rxpy
Last push: 2026-08-24T03:08:15+00:00

## Health v2 (maintenance only)
Score: 89/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 71, longevity 100
- inputs: {"age_days": 4912, "days_push": 9, "days_rel": 37, "gap_med": 131.0, "n_releases_24m": 3}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 5018, forks 365 (observed 2026-08-28T04:09:04.742910+00:00)

## What it is
ReactiveX for Python (RxPY) is a library for composing asynchronous and event-based programs using observable sequences and pipable query operators. It supports both fluent method-chaining and functional pipe-based syntax for building reactive data streams.

## Use cases
- compose asynchronous event streams in python
- handle ui or sensor events reactively
- transform and filter async data pipelines
- manage concurrency with schedulers
- replace callback-heavy code with observable sequences
- debounce and throttle event streams

## When to choose
- you need reactive extensions (Rx) semantics in Python
- you want composable operators over async or event-based data streams
- you need fine-grained control over concurrency via schedulers

## When to avoid
- you only need simple asyncio coroutines without stream composition
- you want a full async web framework rather than a stream library
- your team prefers plain callback or asyncio task patterns

## Facets
- artifact type: library
- maturity: active
- function: concurrency, streaming, middleware
- domain: developer-tools, backend, cross-platform
- platform: python, cross-platform
- tags: reactive-programming, observables, event-driven, async, schedulers, functional-programming, real-time

## Member repositories
- ReactiveX/RxPY (main) score 89

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:09:04.742910+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T18:17:31.080689+00:00, confidence not recorded.
  - readme: https://github.com/ReactiveX/RxPY (fetched 2026-08-28T04:09:04.742910+00:00, sha 410b5505c9b7)
- Data as of 2026-08-30T08:39:29.467469+00:00.