code: def get_pg_core(connection_string, *, cursor_factory=None, edit_connection=None):
    
    import psycopg2 as pq
    from psycopg2.extras import NamedTupleCursor
  
    def opener():
      """Opens a single PostgreSQL connection with the scope-captured connection string."""
      cn = pq.connect(connection_string)
      cn.cursor_factory = cursor_factory or NamedTupleCursor
      if edit_connection:
        edit_connection(cn)
      return cn
  
    return InjectedDataAccessCore(
      opener,
      default_connection_closer,
      ("%({0})s", "%s", "{0}::{1}"),
      empty_params=None,
      supports_timezones=True,
      supports_returning_syntax=True,
      get_autocommit=get_pg_autocommit,
      set_autocommit=set_pg_autocommit)
docs: Creates a simple PostgreSQL core. Requires the psycopg2 library.