sha1origin/pr/2438/mergeghprbActualCommitd0ebd5a976106bab004dc9da1519954ce63c3bb6ghprbActualCommitAuthorghprbActualCommitAuthorEmailghprbAuthorRepoGitUrlhttps://github.com/cclauss/bcc.gitghprbTriggerAuthorghprbTriggerAuthorEmailghprbTriggerAuthorLoginyonghong-songghprbTriggerAuthorLoginMention@yonghong-songghprbPullId2438ghprbTargetBranchmasterghprbSourceBranchupgrade-from-pep8-to-flake8-and-blackGIT_BRANCHupgrade-from-pep8-to-flake8-and-blackghprbPullAuthorEmailcclauss@me.comghprbPullAuthorLogincclaussghprbPullAuthorLoginMention@cclaussghprbPullDescriptionGitHub pull request #2438 of commit d0ebd5a976106bab004dc9da1519954ce63c3bb6, no merge conflicts.ghprbPullTitleUpgrade from pep8 to flake8 and blackghprbPullLinkhttps://github.com/iovisor/bcc/pull/2438ghprbPullLongDescriptionA far more invasive alternative to #2437 which touches more that 200 files by running the [__python/black__](https://github.com/python/black) formatter on all Python files in the codebase. The __.flake8__ file has much fewer issues (61 --> 21) to resolve than #2437 but this PR is harder to review because of the large number of files modified.\r\n\r\nTests are failing because of #2445ghprbCommentBody[buildbot, test this please]ghprbGhRepositoryiovisor/bccghprbCredentialsId6d3daf13-69b8-48b1-9c8f-ec5353264113Started by upstream project "bcc-pr" build number 77bcc-prjob/bcc-pr/60e957d8481f455a1e8009b772a8988ce2dca87040e957d8481f455a1e8009b772a8988ce2dca8704refs/remotes/origin/pr/2433/merge0e957d8481f455a1e8009b772a8988ce2dca87040e957d8481f455a1e8009b772a8988ce2dca8704refs/remotes/origin/pr/2433/merge7fdc23289503102ec3712dac2aa8db50c0659f1b8fdc23289503102ec3712dac2aa8db50c0659f1b8refs/remotes/origin/pr/2438/mergefdc23289503102ec3712dac2aa8db50c0659f1b8fdc23289503102ec3712dac2aa8db50c0659f1b8refs/remotes/origin/pr/2438/merge3ef216ad8a72a283090f026554d1a07bbe18612bdef216ad8a72a283090f026554d1a07bbe18612bdrefs/remotes/origin/pr/2450/mergeef216ad8a72a283090f026554d1a07bbe18612bdef216ad8a72a283090f026554d1a07bbe18612bdrefs/remotes/origin/pr/2450/merge1664c8152485a4208ef3647a9660c18e2c00c7469664c8152485a4208ef3647a9660c18e2c00c7469refs/remotes/origin/pr/2449/merge664c8152485a4208ef3647a9660c18e2c00c7469664c8152485a4208ef3647a9660c18e2c00c7469refs/remotes/origin/pr/2449/mergefdc23289503102ec3712dac2aa8db50c0659f1b8fdc23289503102ec3712dac2aa8db50c0659f1b8refs/remotes/origin/pr/2438/mergehttps://github.com/iovisor/bcc.githttps://buildbot.iovisor.org/jenkins/user/maskray/my-views/view/all/job/bcc-pr/label=ubuntu1804/7/artifacthttps://buildbot.iovisor.org/jenkins/user/maskray/my-views/view/all/job/bcc-pr/label=ubuntu1804/changeshttps://buildbot.iovisor.org/jenkins/user/maskray/my-views/view/all/job/bcc-pr/label=ubuntu1804/7/https://buildbot.iovisor.org/jenkins/user/maskray/my-views/view/all/job/bcc-pr/label=ubuntu1804/7/testReportfalse#79956471197304bcc-pr » ubuntu1804 #77false785SUCCESS1562736688770https://buildbot.iovisor.org/jenkins/user/maskray/my-views/view/all/job/bcc-pr/label=ubuntu1804/7/ubuntu1804-slave-d6egit