/usr/ is in python3-pbr 3.1.1-3ubuntu3.
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/usr/bin/
/usr/bin/python3-pbr
/usr/lib/
/usr/lib/python3/
/usr/lib/python3/dist-packages/
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/usr/share/
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/usr/share/doc/python3-pbr/changelog.Debian.gz
/usr/share/doc/python3-pbr/copyright