code: def deepcopy_strip(item):  # type: (Any) -> Any
      
  
      if isinstance(item, MutableMapping):
          return {k: deepcopy_strip(v) for k, v in iteritems(item)}
      if isinstance(item, MutableSequence):
          return [deepcopy_strip(k) for k in item]
      return item
docs: Make a deep copy of list and dict objects.
  
      Intentionally do not copy attributes.  This is to discard CommentedMap and
      CommentedSeq metadata which is very expensive with regular copy.deepcopy.