class_docstr: Row-normalizes the attributes given in :obj:`attrs` to sum-up to one
  (functional name: :obj:`normalize_features`).
  
  Args:
      attrs (List[str]): The names of attributes to normalize.
          (default: :obj:`["x"]`)
code: def __init__(self, attrs: List[str] = ["x"]):
      self.attrs = attrs
  
imports: from typing import List, Union
  from torch_geometric.data import Data, HeteroData
  from torch_geometric.data.datapipes import functional_transform
  from torch_geometric.transforms import BaseTransform
label_desc: Use image node_id 1 to create a new NormalizeFeatures object from inherited base classes: BaseTransform with example: obj = NormalizeFeatures(attrs)