Hello! First off, I would like to thank you for the excellent work you’ve done here. It’s so fast now! At Datadog we’re going to start using this for all our Agent integration test suites https://github.com/DataDog/integrations-core/pull/5617. I triggered a build of all 120+ of our Agent integrations and tox seems happy across the board.
An interesting thing occurred though, see https://github.com/DataDog/integrations-core/pull/5618. Basically, for the CI (mostly Ubuntu 16.04) in our style tox env (Python 3.7) isort only now correctly identifies _strptime as being part of the standard library. I confirmed this on Windows too.
Beforehand we copied some modules from the system standard library that helped us boostrap the site.py invocation. A side effect of this was that now those modules prefix was a path within the virtual environment, which is different than other standard library modules that lived. With the rewrite this now has been fixed.