/usr/share/pyshared/larch/ is in python-larch 1.20131130-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/pyshared/larch/__init__.py
/usr/share/pyshared/larch/codec.py
/usr/share/pyshared/larch/codec_tests.py
/usr/share/pyshared/larch/forest.py
/usr/share/pyshared/larch/forest_tests.py
/usr/share/pyshared/larch/fsck.py
/usr/share/pyshared/larch/idpath.py
/usr/share/pyshared/larch/idpath_tests.py
/usr/share/pyshared/larch/journal.py
/usr/share/pyshared/larch/journal_tests.py
/usr/share/pyshared/larch/lru.py
/usr/share/pyshared/larch/lru_tests.py
/usr/share/pyshared/larch/nodes.py
/usr/share/pyshared/larch/nodes_tests.py
/usr/share/pyshared/larch/nodestore.py
/usr/share/pyshared/larch/nodestore_disk.py
/usr/share/pyshared/larch/nodestore_disk_tests.py
/usr/share/pyshared/larch/nodestore_memory.py
/usr/share/pyshared/larch/nodestore_memory_tests.py
/usr/share/pyshared/larch/refcountstore.py
/usr/share/pyshared/larch/refcountstore_tests.py
/usr/share/pyshared/larch/tree.py
/usr/share/pyshared/larch/tree_tests.py
/usr/share/pyshared/larch/uploadqueue.py
/usr/share/pyshared/larch/uploadqueue_tests.py