code: def test__sub__(parameter):
      """Test the __sub__ magic method."""
      par, _ = parameter
      assert_allclose(par - 5.25, 4.75)
  
imports: from math import trunc
  import pickle
  import numpy
  from numpy.testing import assert_allclose
  import pytest
  import lmfit
label_desc: Use image node_id 32 for calling a global function with example usage: test__sub__(parameter) without return types