code: def create(mcs, name, dict=None, object_name=None):
          
          if dict is None:
              dict = {}
          _repr = name + '()' if object_name is None else object_name
  
          def __repr__(self=None):
              return _repr
          dict.setdefault('__repr__', __repr__)
          return mcs(name, (object,), dict)
docs: Create a new :class:`Singleton` class
  
          :param name: Name of the new class (Used in its __repr__ if no object_name)
          :type name: str
          :param dict: Optional dictionary of the classes' attributes
          :type dict: Optional[Dict[str, Any]]
          :param object_name: Name of an instance of the singleton. Used in __repr__.
          :type object_name: Optional[str]
          :return: A new Singleton instance
          :rtype: Singleton