text: from collections import namedtuple
  
  FontSettings = namedtuple('FontSettings',
      [
      'legend_size',
      'label_size',
      'title_size',
      'tick_size',
      ])
  
  title   = 25
  label   = 20
  legend  = 20
  tick    = 16
  
  PlotSettings = FontSettings(
      legend_size = legend,
      label_size  = label,
      title_size  = title,
      tick_size   = tick,
      )
  