class_docstr: Callback object that renders a bokeh chart in a jupyter notebook
  that gets updated as the training run proceeds.
  
  Requires a PandasLogger to collect the data it will render.
  
  This is an abstract base-class.  Sub-classes define the specific chart.
class_docstr_tok: ["Callback","object","that","renders","a","bokeh","chart","in","a","jupyter","notebook","that","gets","updated","as","the","training","run","proceeds",".","Requires","a","PandasLogger","to","collect","the","data","it","will","render",".","This","is","an","abstract","base-class",".","Sub-classes","define","the","specific","chart","."]
docstr: Check whether it is time to update plot.
  Returns
  -------
  Boolean value of whethe to update now
code: def interval_elapsed(self):
      """Check whether it is time to update plot.
      Returns
      -------
      Boolean value of whethe to update now
      """
      return time.time() - self.last_update > self.display_freq
  
imports: import time
label_desc: Use image node_id 4 for calling the LiveBokehChart obj's underlying member method code with example usage: obj.interval_elapsed() and returns: unknown