code: def use_all_categories(self):
  		'''
  		Returns
  		-------
  		PriorFactory
  		'''
  		term_df = self.term_ranker.get_ranks()
  		self.priors += term_df.sum(axis=1).fillna(0.)
  		return self use_all_categories(self):
  		'''
  		Returns
  		-------
  		PriorFactory
  		'''
  		term_df = self.term_ranker.get_ranks()
  		self.priors += term_df.sum(axis=1).fillna(0.)
  		return self
docs: Returns
  		-------
  		PriorFactory