Define global variable at the module level

critiquebrainz/frontend/external/musicbrainz_db/__init__.py

@@ -1,9 +1,11 @@
+from typing import Optional
 from contextlib import contextmanager
 from sqlalchemy import create_engine
-from sqlalchemy.orm import sessionmaker, scoped_session
+from sqlalchemy.orm import sessionmaker, scoped_session, Session
 from sqlalchemy.pool import NullPool
 
 engine = None
+Session: Optional[Session] = None
 
 def init_db_engine(connect_str):
     global engine, Session

pylintrc

@@ -9,7 +9,7 @@
 # --enable=similarities". If you want to run only the classes checker, but have
 # no Warning level messages displayed, use"--disable=all --enable=classes
 # --disable=W"
-disable=missing-docstring,protected-access,invalid-name,global-statement,fixme,too-many-locals,too-many-branches,redefined-builtin,broad-except,line-too-long,too-many-arguments,too-many-instance-attributes,redefined-outer-name,attribute-defined-outside-init,anomalous-backslash-in-string,too-many-statements,global-variable-undefined,too-few-public-methods,redefined-argument-from-local,too-many-return-statements,too-many-function-args,redefined-argument-from-local,too-many-public-methods
+disable=missing-docstring,protected-access,invalid-name,global-statement,fixme,too-many-locals,too-many-branches,redefined-builtin,broad-except,line-too-long,too-many-arguments,too-many-instance-attributes,redefined-outer-name,attribute-defined-outside-init,anomalous-backslash-in-string,too-many-statements,too-few-public-methods,redefined-argument-from-local,too-many-return-statements,too-many-function-args,redefined-argument-from-local,too-many-public-methods
 
 
 [REPORTS]