Message 322200 - Python tracker

Matěj Cepl: There is a bot to backport changes to other branches. I closed your backport PRs. I prefer to polish the change for the master branch, and only backport later. For example, I modified the commit message of your PR. The bot also uses "git cherry-pick -x" to mention the sha1 of the backported commit which helps to track the origin of backports.