new_contents: from ktbs_bench import graph_store as gs
  import psycopg2 as pg
  
  
  def pg_create(db_name, db_user):
      """Create a PostgreSQL database."""
      connection = pg.connect(
          "dbname=%s user=%s" % (db_user, db_user))  # connect to db_user as db_name might not been created yet
      connection.set_isolation_level(pg.extensions.ISOLATION_LEVEL_AUTOCOMMIT)
      cursor = connection.cursor()
      cursor.execute("CREATE DATABASE %s" % db_name)
      cursor.close()
      connection.close()
  
  
  def get_store(db_name, db_user):
      postgres_store = gs.GraphStore(store="SQLAlchemy",
                                     connect_args={'configuration': "postgresql+psycopg2://localhost/%s" % db_name,
                                                   'create': True},
                                     create_func=pg_create, create_args=[db_name, db_user])
      return postgres_store
  
subject: Add example of postgres GraphStore