code: def peek(init, exposes, debug=False):
      
      def _peek(store, container, _stack=None):
          args = [ store.peek(objname, container, _stack=_stack) \
              for objname in exposes ]
          if debug:
              print(args)
          return init(*args)
      return _peek
docs: Default deserializer factory.
  
      Arguments:
  
          init (callable): type constructor.
  
          exposes (iterable): attributes to be peeked and passed to `init`.
  
      Returns:
  
          callable: deserializer (`peek` routine).