code: def add_die(self, die, count=1):
          '''Add ``Die`` to Roll.
          :param die: Die instance
          :param count: number of times die is rolled
          '''
          for x in range(count):
              self._dice.append(die)
          self._odds = Nonf add_die(self, die, count=1):
          '''Add ``Die`` to Roll.
          :param die: Die instance
          :param count: number of times die is rolled
          '''
          for x in range(count):
              self._dice.append(die)
          self._odds = None
docs: Add ``Die`` to Roll.
          :param die: Die instance
          :param count: number of times die is rolled