code: def test_threshold():
      X, y = iris_data()
      ax, threshold, count = ecdf(
          x=X[:, 0], x_label="sepal length (cm)", percentile=0.8
      )
      assert threshold == 6.5
      assert count == 120
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_threshold() without return types