code: def import_powerflow_results(self, session):
          
  
          # bus data
          pypsa_io.import_pfa_bus_results(session, self)
  
          # line data
          pypsa_io.import_pfa_line_results(session, self)
docs: Assign results from power flow analysis to edges and nodes
  
          Parameters
          ----------
          session: :sqlalchemy:`SQLAlchemy session object<orm/session_basics.html>`
              Description