I am running into some issues with prometheus_client trying import the resource package since I'm on a Windows machine. It looks like there was a previous fix #28 . However, that fix no longer works properly for some of us. I looks like Since Python 3.3+ you can import an empty folder and therefore when it try's to import the resource package it doesn't always raise an ImportError. It does however raise an AttributeError when it try's to get the page size.

I'll submit a pull request since it's a simple fix, but I figured I'd submit an issue for tracking first.