code: def length_estimate(self):
          '''
          Calculates and estimated word count based on number of characters, locations,
          and arcs. For reference see:
          http://www.writingexcuses.com/2017/07/02/12-27-choosing-a-length/
          '''
          characters = self.characterinstance_set.filter(
              Q(main_character=True) |
              Q(pov_character=True) |
              Q(protagonist=True) |
              Q(antagonist=True) |
              Q(villain=True)).count()
          locations = self.locationinstance_set.count()
          arcs = self.arc_set.count()
          return ((characters + locations) * 750) * (1.5 * arcsf length_estimate(self):
          '''
          Calculates and estimated word count based on number of characters, locations,
          and arcs. For reference see:
          http://www.writingexcuses.com/2017/07/02/12-27-choosing-a-length/
          '''
          characters = self.characterinstance_set.filter(
              Q(main_character=True) |
              Q(pov_character=True) |
              Q(protagonist=True) |
              Q(antagonist=True) |
              Q(villain=True)).count()
          locations = self.locationinstance_set.count()
          arcs = self.arc_set.count()
          return ((characters + locations) * 750) * (1.5 * arcs)
docs: Calculates and estimated word count based on number of characters, locations,
          and arcs. For reference see:
          http://www.writingexcuses.com/2017/07/02/12-27-choosing-a-length/