class_docstr: ```
  Node preprocessing base class
  ```
class_docstr_tok: ["``","`","Node","preprocessing","base","class","``","`"]
code: def preprocess(self, df, G):
      return self.preprocess_test(df, G)
  
imports: from ..None import utils
  from ..imports import *
  from ..preprocessor import Preprocessor
label_desc: Use image node_id 5 for calling the NodePreprocessor obj's underlying member method code with example usage: obj.preprocess(df, G) and returns: self