code: def _reset(self):
          
  
          # Checking one attribute is enough, because they are all set together
          # in partial_fit
          if hasattr(self, 'scale_'):
              del self.scale_
              del self.n_samples_seen_
              del self.mean_
              del self.var_
docs: Reset internal data-dependent state of the scaler, if necessary.
          __init__ parameters are not touched.