old_contents: import json
  
  from marathon.util import to_camel_case, to_snake_case, MarathonJsonEncoder
  
  
  class MarathonObject(object):
      """Base Marathon object."""
  
      def json_repr(self):
          """Construct a JSON-friendly representation of the object.
  
          :rtype: dict
          """
          return {to_camel_case(k):v for k,v in vars(self).iteritems()}
  
      @classmethod
      def from_json(cls, attributes):
          """Construct an object from a parsed response.
  
          :param dict attributes: object attributes from parsed response
          """
          return cls(**{to_snake_case(k): v for k,v in attributes.iteritems()})
  
  
  class MarathonResource(MarathonObject):
      """Base Marathon resource."""
  
      def __repr__(self):
          if 'id' in vars(self).keys():
              return "{clazz}::{id}".format(clazz=self.__class__.__name__, id=self.id)
          else:
              return "{clazz}::{obj}".format(clazz=self.__class__.__name__, obj=self.to_json())
  
      def to_json(self):
          """Encode an object as a JSON string.
  
          :rtype: str
          """
          return json.dumps(self.json_repr(), cls=MarathonJsonEncoder, sort_keys=True)
  
new_contents: import json
  
  from marathon.util import to_camel_case, to_snake_case, MarathonJsonEncoder
  
  
  class MarathonObject(object):
      """Base Marathon object."""
  
      def __repr__(self):
          return "{clazz}::{obj}".format(clazz=self.__class__.__name__, obj=self.to_json())
  
      def json_repr(self):
          """Construct a JSON-friendly representation of the object.
  
          :rtype: dict
          """
          return {to_camel_case(k):v for k,v in vars(self).iteritems()}
  
      @classmethod
      def from_json(cls, attributes):
          """Construct an object from a parsed response.
  
          :param dict attributes: object attributes from parsed response
          """
          return cls(**{to_snake_case(k): v for k,v in attributes.iteritems()})
  
      def to_json(self):
          """Encode an object as a JSON string.
  
          :rtype: str
          """
          return json.dumps(self.json_repr(), cls=MarathonJsonEncoder, sort_keys=True)
  
  
  class MarathonResource(MarathonObject):
      """Base Marathon resource."""
  
      def __repr__(self):
          if 'id' in vars(self).keys():
              return "{clazz}::{id}".format(clazz=self.__class__.__name__, id=self.id)
          else:
              return super(MarathonResource).__repr__()
  
  
subject: Tweak Marathon object __repr__