/usr/lib/pyshared/ is in python-zodb 1:3.9.7-2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pyshared/python2.7/
/usr/lib/pyshared/python2.7/BTrees/
/usr/lib/pyshared/python2.7/BTrees/_IFBTree.so
/usr/lib/pyshared/python2.7/BTrees/_IIBTree.so
/usr/lib/pyshared/python2.7/BTrees/_IOBTree.so
/usr/lib/pyshared/python2.7/BTrees/_LFBTree.so
/usr/lib/pyshared/python2.7/BTrees/_LLBTree.so
/usr/lib/pyshared/python2.7/BTrees/_LOBTree.so
/usr/lib/pyshared/python2.7/BTrees/_OIBTree.so
/usr/lib/pyshared/python2.7/BTrees/_OLBTree.so
/usr/lib/pyshared/python2.7/BTrees/_OOBTree.so
/usr/lib/pyshared/python2.7/BTrees/_fsBTree.so
/usr/lib/pyshared/python2.7/persistent/
/usr/lib/pyshared/python2.7/persistent/TimeStamp.so
/usr/lib/pyshared/python2.7/persistent/cPersistence.so
/usr/lib/pyshared/python2.7/persistent/cPickleCache.so