Comment 19 for bug 1856485

Python 3 support was added in Calico v3.15 https://docs.projectcalico.org/release-notes/#v3150

The master networking-calico code now supports Python 3, and no longer Python 2. There is a 'release-v3.15-python2' branch that still supports Python 2, but we are hoping that maintenance of that branch can now be short-lived.