code: def transform(self, X):
      X = np.asarray(X)
      X -= self.mean_
      X /= self.scale_
      return X
  
file_path: TTS/TTS/tts/utils/data.py
imports: import numpy
label_desc: Use image node_id 3 for calling the StandardScaler obj's underlying member method code with example usage: obj.transform(X) and returns: X