def __init__(self, db_path):
    """Constructor.

    Args:
      db_path: Path to db to read or write
    """
    self._db_path: Text = db_path
    self._engine, self.session = create_session(self._db_path)
Constructor.

    Args:
      db_path: Path to db to read or write
    
language/serene/wiki_db.py