text: import collections.abc
  
  
  class FactoryMap(collections.abc.Mapping):
      def __init__(self, factory):
          self._factory = factory
  
      def __getitem__(self, key):
          return self._factory()[key]
  
      def __len__(self):
          return len(self._factory())
  
      def __iter__(self):
          return iter(self._factory())
  
      def __repr__(self):
          return repr(self._factory())
  