code: def test_mapping_tuple_single_kv():
      d = {"a": [1, 2, 3]}
      assert _mapping_to_tuple_pairs(d) == (
          (("a", 1),),
          (("a", 2),),
          (("a", 3),),
      )
  
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 14 for calling a global function with example usage: test_mapping_tuple_single_kv() without return types