docs: def sli_run(parameters=object(),
              fname='microcircuit.sli',
              verbosity='M_ERROR'):
      '''
      Takes parameter-class and name of main sli-script as input, initiating the
      simulation.
      
      kwargs:
      ::
          parameters : object, parameter class instance
          fname : str, path to sli codes to be executed
          verbosity : 'str', nest verbosity flag
      '''
      # Load parameters from params file, and pass them to nest
      # Python -> SLI
      send_nest_params_to_sli(vars(parameters))
      
      #set SLI verbosity
      nest.sli_run("%s setverbosity" % verbosity)
      
      # Run NEST/SLI simulation
      nest.sli_run('(%s) run' % fname)