docs: def repr(self, *args, **kwargs):
          """
          Returns the unique string representation of the number.
          """
          if not self.is_numpy:
              text = "'" + self.str(*args, **kwargs) + "'"
          else:
              text = "{} numpy array, {} uncertainties".format(self.shape, len(self.uncertainties))
  
          return "<{} at {}, {}>".format(self.__class__.__name__, hex(id(self)), text)