code: def plot_dict(self, flags, label='key', known='x', **kwargs):
          
          out = []
          for lab, flag in flags.items():
              if label.lower() == 'name':
                  lab = flag.name
              elif label.lower() != 'key':
                  lab = label
              out.append(self.plot_flag(flag, label=to_string(lab), known=known,
                                        **kwargs))
          return out
docs: Plot a `~gwpy.segments.DataQualityDict` onto these axes
  
          Parameters
          ----------
          flags : `~gwpy.segments.DataQualityDict`
              data-quality dict to display
  
          label : `str`, optional
              labelling system to use, or fixed label for all `DataQualityFlags`.
              Special values include
  
              - ``'key'``: use the key of the `DataQualityDict`,
              - ``'name'``: use the :attr:`~DataQualityFlag.name` of the
                `DataQualityFlag`
  
              If anything else, that fixed label will be used for all lines.
  
          known : `str`, `dict`, `None`, default: '/'
              display `known` segments with the given hatching, or give a
              dict of keyword arguments to pass to
              :meth:`~SegmentAxes.plot_segmentlist`, or `None` to hide.
  
          **kwargs
              any other keyword arguments acceptable for
              `~matplotlib.patches.Rectangle`
  
          Returns
          -------
          collection : `~matplotlib.patches.PatchCollection`
              list of `~matplotlib.patches.Rectangle` patches