code: def test_check_memory_limit():
      valid_values = [0.5, 0.1, 0.99]
      for limit in valid_values:
          _check_memory_limit(limit)
  
      invalid_values = [0, 1, -0.1, 1.1]
      for limit in invalid_values:
          with pytest.raises(ValueError):
              _check_memory_limit(limit)
  
imports: import pandas
  import numpy
  import pytest
  from pdpbox.utils import FeatureInfo, _to_rgba, _check_col, _check_dataset, _make_list, _check_model, _check_classes, _check_memory_limit, _check_frac_to_plot, _calc_n_jobs, _get_string, _expand_params_for_interact, _calc_preds, _check_cluster_params, _check_plot_engine, _check_pdp_interact_plot_type
label_desc: Use image node_id 6 for calling a global function with example usage: test_check_memory_limit() without return types