code: def extract_model(self):
          '''
          Extract camera model
          '''
          fields = ['EXIF LensModel', 'Image Model']
          model, _ = self._extract_alternative_fields(
              fields, default='none', field_type=str)
          return modef extract_model(self):
          '''
          Extract camera model
          '''
          fields = ['EXIF LensModel', 'Image Model']
          model, _ = self._extract_alternative_fields(
              fields, default='none', field_type=str)
          return model
docs: Extract camera model