avoid 'assert' statements

5 jobs for NIFTy_4 in 8 minutes and 58 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build Docker
passed #591513
build_docker_from_scratch

00:06:42

 
  Test
passed #591514
test_python2_with_coverage

00:01:11

80.0%
passed #591515
test_python3

00:01:03

 
  Release
passed #591516
pages

00:00:50

 
  Deploy
passed pages:deploy

00:00:00