pallets-eco/blinker

Health v2 · maintenance only

Adoption not part of the score

2087 stars · 189 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Blinker is a fast Python library for in-process signal/event dispatching, letting any number of receivers subscribe to events or 'signals' from specific or any senders. It is part of the Pallets ecosystem (the organization behind Flask) and is commonly used for decoupled event notification within Python applications.

Use cases

• dispatch events between python objects without tight coupling
• implement observer pattern in python
• broadcast notifications to multiple subscribers
• hook into application lifecycle events
• subscribe to signals from specific senders only
• decouple components with a lightweight pubsub mechanism

When to choose

• you need lightweight in-process event dispatching in Python
• you're building Flask or Pallets-based apps and want idiomatic signals
• you want a small, fast, MIT-licensed dependency with no heavy requirements

When to avoid

• you need distributed or cross-process messaging (use a message queue instead)
• you need async-first event handling with backpressure
• your framework already provides its own event system

Facets

library · maturity stable

middleware developer-tools developer-tools web-development backend python cross-platform signals event-dispatching pubsub observer-pattern flask-ecosystem

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