AWS - awslogs-agent-setup.py is not supported for Python 3.6
You should probably install the new CloudWatch Agent instead of the old python-based awslogs agent. The new agent supports all the features of the old agent, is much faster, is a standalone binary without any dependencies, and has a simple wizard to convert your awslogs config file to the new format.
On the other hand, if you're using docker, you could also use the native docker driver for CloudWatch Logs.