code: def test_boxcox_against_scipy():
      """Test boxcox transformer vs the scipy boxvox function."""
      from scipy.stats import boxcox
  
      y = load_airline()
  
      t = BoxCoxTransformer()
      actual = t.fit_transform(y)
  
      excepted, expected_lambda = boxcox(y.values)
  
      np.testing.assert_array_equal(actual, excepted)
      assert t.lambda_ == expected_lambda
  
imports: import numpy
  import pytest
  from sktime.datasets import load_airline
  from sktime.transformations.series.boxcox import BoxCoxTransformer
  from sktime.utils.validation._dependencies import _check_soft_dependencies
label_desc: Use image node_id 1 for calling a global function with example usage: test_boxcox_against_scipy() without return types