code: def test_kneighbors_regressor_distance_weight_train_data(self):
      self._test_kneighbors_regressor(
          3, weights="distance", score_w_train_data=True
      )
  
imports: import unittest
  from packaging.version import Version, parse
  import numpy
  import sklearn
  import torch
  from sklearn.neighbors import KNeighborsClassifier, KNeighborsRegressor
  from sklearn import datasets
  import hummingbird.ml
label_desc: Use image node_id 20 for calling the TestSklearnKNeighbors obj's underlying member method code with example usage: obj.test_kneighbors_regressor_distance_weight_train_data() without return types