/usr/lib/python3/dist-packages/ is in python3-distupgrade 1:16.04.12.
This file is owned by root:root, with mode 0o755.
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/usr/lib/python3/dist-packages/DistUpgrade/
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeApport.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeAptCdrom.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeAufs.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeCache.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeConfigParser.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeController.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcher.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherKDE.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherSelf.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeGettext.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeMain.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradePatcher.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeQuirks.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeVersion.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeView.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeViewGtk3.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeViewKDE.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeViewNonInteractive.py
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeViewText.py
/usr/lib/python3/dist-packages/DistUpgrade/GtkProgress.py
/usr/lib/python3/dist-packages/DistUpgrade/MetaRelease.py
/usr/lib/python3/dist-packages/DistUpgrade/QUrlOpener.py
/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewer.py
/usr/lib/python3/dist-packages/DistUpgrade/ReleaseNotesViewerWebkit.py
/usr/lib/python3/dist-packages/DistUpgrade/SimpleGtk3builderApp.py
/usr/lib/python3/dist-packages/DistUpgrade/SimpleGtkbuilderApp.py
/usr/lib/python3/dist-packages/DistUpgrade/__init__.py
/usr/lib/python3/dist-packages/DistUpgrade/apt_btrfs_snapshot.py
/usr/lib/python3/dist-packages/DistUpgrade/apt_clone.py
/usr/lib/python3/dist-packages/DistUpgrade/dist-upgrade.py
/usr/lib/python3/dist-packages/DistUpgrade/distinfo.py
/usr/lib/python3/dist-packages/DistUpgrade/distro.py
/usr/lib/python3/dist-packages/DistUpgrade/sourceslist.py
/usr/lib/python3/dist-packages/DistUpgrade/utils.py
/usr/lib/python3/dist-packages/DistUpgrade/xorg_fix_proprietary.py