/usr/share/pyshared/bzrlib/plugins/ is in bzr-pipeline 1.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/bzrlib/plugins/pipeline/
/usr/share/pyshared/bzrlib/plugins/pipeline/__init__.py
/usr/share/pyshared/bzrlib/plugins/pipeline/check-release.py
/usr/share/pyshared/bzrlib/plugins/pipeline/commands.py
/usr/share/pyshared/bzrlib/plugins/pipeline/loom.py
/usr/share/pyshared/bzrlib/plugins/pipeline/pipeline.py
/usr/share/pyshared/bzrlib/plugins/pipeline/real_init.py
/usr/share/pyshared/bzrlib/plugins/pipeline/tests/
/usr/share/pyshared/bzrlib/plugins/pipeline/tests/__init__.py
/usr/share/pyshared/bzrlib/plugins/pipeline/tests/test_blackbox.py
/usr/share/pyshared/bzrlib/plugins/pipeline/tests/test_pipeline.py