code: def __call__(self, direction, factor, values):  # hour
      return super().__call__(
          direction, factor, np.asarray(values) / 15
      )
  
imports: import numpy
  import math
  from mpl_toolkits.axisartist.grid_finder import ExtremeFinderSimple
label_desc: Use image node_id 1 for calling the FormatterHMS obj's underlying member method code with example usage: obj.__call__(direction, factor, values) and returns: super