I am trying to use py2app, and it is choking on pytz which is used by matplotlib. Reading the py2app docs, and a lot of posts, it seems that the problem I'm having isn't common. Essentially, it is saying that there is no pytz.zoneinfo module. So I checked, with the latest pytz installed, and there is no pytz.zoneinfo module! There is a directory under pytz called zoneinfo, but there is no __init__.py. Is there something I am missing? Have others managed to get py2app work with an app that uses matplotlib?