One frustrating part of attempting to transition is that not all libraries make it clear which Python versions are supported. Usually it's Python 2-only code th

One frustrating part of attempting to transition is that not all libraries make it clear which Python versions are supported. Usually it's Python 2-only code that isn't clearly labeled as such, but it happens with Python 3 code as well. Sometimes a library doesn't work under specific versions of Python 3. The result is that library research takes longer than it would. Please include this in the README for any project, even if it seems obvious.