code: def test_simple_product_lists_order_matters():
      assert _product([3, 4], [1, 2]) == [
          (3, 1),
          (3, 2),
          (4, 1),
          (4, 2),
      ]
  
imports: import pytest
  import numpy
  from sklearn_evaluation.util import _can_iterate, is_column_vector, is_row_vector, _group_by, _product, _mapping_to_tuple_pairs, map_parameters_in_fn_call
label_desc: Use image node_id 20 for calling a global function with example usage: test_simple_product_lists_order_matters() without return types