Lessen the linting strictness on lambda expressions.

.gitlab-ci.yml

@@ -62,7 +62,7 @@ linting:
   image: $TEST_IMAGE
   script:
     - cd /app
-    - python -m pycodestyle --ignore=E501,E701 nomad tests
+    - python -m pycodestyle --ignore=E501,E701,E731 nomad tests
     - python -m pylint --load-plugins=pylint_mongoengine nomad tests
     - python -m mypy --ignore-missing-imports --follow-imports=silent --no-strict-optional nomad tests
   except:

nomad/cli/dev.py

@@ -35,7 +35,7 @@ def qa(skip_tests: bool, exitfirst: bool):
         click.echo('Run tests ...')
         ret_code += os.system('python -m pytest -sv%s tests' % ('x' if exitfirst else ''))
     click.echo('Run code style checks ...')
-    ret_code += os.system('python -m pycodestyle --ignore=E501,E701 nomad tests')
+    ret_code += os.system('python -m pycodestyle --ignore=E501,E701,E731 nomad tests')
     click.echo('Run linter ...')
     ret_code += os.system('python -m pylint --load-plugins=pylint_mongoengine nomad tests')
     click.echo('Run static type checks ...')