/usr/lib/python2.7/dist-packages/swift/common/middleware/ is in python-swift 2.7.0-0ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/dist-packages/swift/common/middleware/__init__.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/account_quotas.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/acl.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/bulk.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/catch_errors.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/cname_lookup.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/container_quotas.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/container_sync.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/crossdomain.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/dlo.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/domain_remap.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/formpost.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/gatekeeper.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/healthcheck.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/keystoneauth.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/list_endpoints.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/memcache.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/name_check.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/proxy_logging.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/ratelimit.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/recon.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/slo.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/staticweb.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/tempauth.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/tempurl.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/versioned_writes.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/x_profile/
/usr/lib/python2.7/dist-packages/swift/common/middleware/x_profile/__init__.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/x_profile/exceptions.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/x_profile/html_viewer.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/x_profile/profile_model.py
/usr/lib/python2.7/dist-packages/swift/common/middleware/xprofile.py