code: def X():
      return np.array(
          [
              [0],
              [7],
              [6],
              [4],
              [4],
              [8],
              [0],
              [6],
              [2],
              [0],
              [5],
              [9],
              [7],
              [7],
              [7],
              [7],
          ]
      )
  
imports: import numpy
  import pytest
  from sklearn.dummy import DummyClassifier
  from sklearn.model_selection import cross_val_score
  from mlxtend.evaluate import GroupTimeSeriesSplit
label_desc: Use image node_id 1 for calling a global function with example usage: X() and returns: np