code: def show_info(self, **kwargs):
          
          stream = kwargs.pop("stream", sys.stdout)
  
          lines = [str(self)]
          app = lines.append
  
          app("Number of works: %d, total number of tasks: %s" % (len(self), self.num_tasks) )
          app("Number of tasks with a given class:\n")
  
          # Build Table
          data = [[cls.__name__, len(tasks)]
                  for cls, tasks in self.groupby_task_class().items()]
          app(str(tabulate(data, headers=["Task Class", "Number"])))
  
          stream.write("\n".join(lines))
docs: Print info on the flow i.e. total number of tasks, works, tasks grouped by class.
  
          Example:
  
              Task Class      Number
              ------------  --------
              ScfTask              1
              NscfTask             1
              ScrTask              2
              SigmaTask            6