text: # SPDX-FileCopyrightText: 2020 Robert Cohn
  #
  # SPDX-License-Identifier: MIT
  
  """Class and other objects that must be defined before core can be
  imported.
  
  """
  
  from abc import ABC
  
  
  class Object(ABC):
      """Abstract base class for objects."""
  
      def __str__(self):
          """Generic string formatter."""
  
          return str(self.__class__) + ": " + str(self.__dict__)
  