code: def test__rmul__(parameter):
      """Test the __rmul__ magic method."""
      par, _ = parameter
      assert_allclose(2.5 * par, 25.0)
      assert_allclose(-0.1 * par, -1.0)
  
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 50 for calling a global function with example usage: test__rmul__(parameter) without return types