napari plugin engine

napari-plugin-engine is the first generation napari plugin engine. We recommend new plugins should use the second generation npe2.

napari-plugin-engine is a fork of pluggy, modified by the napari team.

There are some API and feature changes, including:

discovery via naming convention as well as entry_points
support for reordering of hook calls after registration.
enhanced API for retrieving plugin package metadata.
modified plugin call and registration exception handling
modified HookResult object and hook call loop, with ability to retrieve the HookImplementation responsible for the result.
lazy plugin discovery
some changes to variable and attribute naming
removed all deprecated code
type annotations on everything
pytest fixtures for testing
a couple napari-specific convenience imports

For usage overview and a reference for the napari-plugin-engine API, see our Documentation

install

pip install napari-plugin-engine