I believe Lambda runs on AWS linux distributions, and 2.7 is the default Python version for those [1]. 1. https://aws.amazon.com/amazon-linux-ami/2015.03-rele

I believe Lambda runs on AWS linux distributions, and 2.7 is the default Python version for those [1]. 1. https://aws.amazon.com/amazon-linux-ami/2015.03-release-notes/ https://aws.amazon.com/amazon-linux-ami/2015.03-release-note...