#### I get an "ImportError: No module named event". How come?

The event module is a simple python module, while _event is a cython module which we cannot import if it has not been compiled. Helpful link.

> make force

To build a Python extension, we need to run setup.py script, not the make command.

Maintainer merge checklist

• Title is descriptive/clear for inclusion in release notes.
• Applied a Component: xxx label.
• Applied the api-deprecation or api-break label.
• Applied the release-highlight label to be highlighted in release notes.
• Added to the milestone version it was merged into.
• Unittests are included in PR.
• Properly documented, including versionadded, versionchanged as needed.