code: def param_show(self, param, l=False):
          
          cmd = 'param.show '
          if l: cmd += '-l '
          return self.fetch(cmd + param)
docs: param.show [-l] [param]
                Display a list if run-time parameters and their values.
                If the -l option is specified, the list includes a brief explanation of each parameter.
                If a param is specified, display only the value and explanation for this parameter.