code: def samples_from_cli(self, opts, parameters=None, **kwargs):
          
          if parameters is None and opts.parameters is None:
              parameters = self.variable_args
          elif parameters is None:
              parameters = opts.parameters
          # parse optional arguments
          _, extra_actions = self.extra_args_parser()
          extra_args = [act.dest for act in extra_actions]
          kwargs = self._get_optional_args(extra_args, opts, **kwargs)
          return self.read_samples(parameters, **kwargs)
docs: Reads samples from the given command-line options.
  
          Parameters
          ----------
          opts : argparse Namespace
              The options with the settings to use for loading samples (the sort
              of thing returned by ``ArgumentParser().parse_args``).
          parameters : (list of) str, optional
              A list of the parameters to load. If none provided, will try to
              get the parameters to load from ``opts.parameters``.
          \**kwargs :
              All other keyword arguments are passed to ``read_samples``. These
              will override any options with the same name.
  
          Returns
          -------
          FieldArray :
              Array of the loaded samples.