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Docs/ API Reference/ Context/ events

Context· property

Context.events

the running app's event bus, to subscribe or emit

Python

events: EventBus

Returns EventBus — the running app's event bus, or None

Example#

Python

@tool.command("demo/watch")
def watch(ctx: Context):
    ctx.events.on("engine/run/finished", on_done)

Notes#

Subscribe with on(pattern, handler) or emit topics — use the topic enums (Events, ViewerEvents, …), not raw strings. Handlers are async. A lazily populated slot — None when no bus is available.

Example#

Notes#

See also#