code: def test_first():
      assert convert_to_nth(1) == "1st"
      assert convert_to_nth(21) == "21st"
      assert convert_to_nth(131) == "131st"
  
imports: from featuretools.utils.description_utils import convert_to_nth
label_desc: Use image node_id 1 for calling a global function with example usage: test_first() without return types