> Specifically, 2.7 will receive bugfix support until January 1, 2020. All 2.7 development work will cease in 2020.
> I've updated the PEP to say 2.7 is completely dead on Jan 1 2020. The final release may not literally be on January 1st, but we certainly don't want to support 2.7 through all of 2020.
https://www.python.org/dev/peps/pep-0373/#maintenance-releas... https://mail.python.org/pipermail/python-dev/2018-March/1523...
I have no idea why would a project of this caliber would start by using Python 2 instead of Python 3.
Edit: When I started reading about GCF, all docs said I could only use Python 2. Later I found that they seem to be on the way to change this. But still, I was very surprised that Python 2 was even an option to begin with.