code: def tcmap(self):
          ''' Create a tokens-concepts map '''
          tcmap = dd(list)
          for concept in self.__concept_map.values():
              for w in concept.tokens:
                  tcmap[w].append(concept)
          return tcmaf tcmap(self):
          ''' Create a tokens-concepts map '''
          tcmap = dd(list)
          for concept in self.__concept_map.values():
              for w in concept.tokens:
                  tcmap[w].append(concept)
          return tcmap
docs: Create a tokens-concepts map