
flake8 new release 3.8.0 added new checks and gate pep8 job start failing. hacking 3.0.1 fix the pinning of flake8 to avoid bringing in a new version with new checks. Though it is fixed in latest hacking but 2.0 and 3.0 has cap for flake8 as <4.0.0 which mean flake8 new version 3.9.0 can also break the pep8 job if new check are added. To avoid similar gate break in future, we need to bump the hacking min version. - http://lists.openstack.org/pipermail/openstack-discuss/2020-May/014828.html Change-Id: I8123f403a23f17c20cd5b114227fef45d2eb7992
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