/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/ is in python3-sqlalchemy 1.0.15+ds1-1.
This file is owned by root:root, with mode 0o755.
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/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/__init__.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/base.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/constraints.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/hstore.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/json.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/pg8000.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/psycopg2.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/psycopg2cffi.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/pypostgresql.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/ranges.py
/usr/lib/python3/dist-packages/sqlalchemy/dialects/postgresql/zxjdbc.py