Flake8 CI

cc @tasmith4

.gitlab-ci.yml

@@ -12,3 +12,12 @@ Python 3 POCL:
   artifacts:
     reports:
       junit: pytest.xml
+
+Flake8:
+  script:
+  - curl -L -O -k https://gitlab.tiker.net/inducer/ci-support/raw/master/prepare-and-run-flake8.sh
+  - ". ./prepare-and-run-flake8.sh benchmark*.py test*.py util*.py"
+  tags:
+  - python3
+  except:
+  - tags
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