I can assure you, as an active technical contributor, that the testing infrastructure in Openstack is verifying business logic, ensuring consistent coding stand

I can assure you, as an active technical contributor, that the testing infrastructure in Openstack is verifying business logic, ensuring consistent coding standards, running unit tests and code coverage, and all of the usual activities associated with delivering reliable software. The difference for many projects is the scale at which it is automated thanks to the Openstack Infra and QA teams. Any suggestion that Python code cannot possibly execute without it is an exaggeration.