code: def after_fork(self) -> None:
      # Clear the cursor cache, we don't want any stale connections from
      # the previous process.
      Cursor.clear_cache()
  
file_path: dejavu/dejavu/database_handler/postgres_database.py
imports: import queue
  import psycopg2
  from psycopg2.extras import DictCursor
  from dejavu.base_classes.common_database import CommonDatabase
  from dejavu.config.settings import FIELD_FILE_SHA1, FIELD_FINGERPRINTED, FIELD_HASH, FIELD_OFFSET, FIELD_SONG_ID, FIELD_SONGNAME, FIELD_TOTAL_HASHES, FINGERPRINTS_TABLENAME, SONGS_TABLENAME
label_desc: Use image node_id 2 for calling the PostgreSQLDatabase obj's underlying member method code with example usage: obj.after_fork() without return types