What is `python-gtk2`? It looks like the name of a Debian package?
- What was the error message when it crashed? (should show in Help->Debug messages) - Where did you install GeanyPy from (ie. from source, distro repository, Windows installer)? - What operating system are you using? - What version of Geany? - What version of GeanyPy?
The plugin itself definitively [depends on PyGTK+](https://github.com/geany/geany-plugins/blob/1.33.0/build/geanypy.m4#L5).