code: def test__str__(parameter):
      """Test the __str__ magic method."""
      par, _ = parameter
      assert (
          str(par)
          == "<Parameter 'a', value=10.0, bounds=[-100.0:100.0], brute_step=5.0>"
      )
  
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 23 for calling a global function with example usage: test__str__(parameter) without return types