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# ``twisted`.`logger`.`_legacy``

module documentation
(source)

Integration with `twisted.python.log`.

Function | `publishToNewObserver` | Publish an old-style (`twisted.python.log`) event to a new-style (`twisted.logger`) observer.

def publishToNewObserver(observer: `ILogObserver`, eventDict: `dict[str, Any]`, textFromEventDict: `Callable[[dict[str, Any]], str | None]`): (source)

Publish an old-style (`twisted.python.log`) event to a new-style (`twisted.logger`) observer.

Parameters
observer:`ILogObserver` | A new-style observer to handle this event.
eventDict:`dict[str, Any]` | An `old-style`, log event.
textFromEventDict:`Callable[[dict[str, Any]], str | None]` | callable that can format an old-style event as a string. Passed here rather than imported to avoid circular dependency.

Note
It's possible that a new-style event was sent to a `LegacyLogObserverWrapper`, and may now be getting sent back to a new-style observer. In this case, it's already a new-style event, adapted to also look like an old-style event, and we don't need to tweak it again to be a new-style event, hence this checks for already-defined new-style keys.