code: def test_rq_predict_length():
      """
      Tests that the prediction dataframe length is equal to the number of steps h
      """
      model = pf.GPNARX(data=data, ar=2, kernel=pf.RationalQuadratic())
      x = model.fit()
      x.summary()
      assert model.predict(h=5).shape[0] == 5
  
imports: import numpy
  import pyflux
label_desc: Use image node_id 24 for calling a global function with example usage: test_rq_predict_length() without return types