code: def test_sum_attributes_tuple(env_async):
      tmpl = env_async.from_string("""{{ values.items()|sum('1') }}""")
      assert (
          tmpl.render(values={"foo": 23, "bar": 1, "baz": 18}) == "42"
      )
  
imports: from collections import namedtuple
  import pytest
  from jinja2 import Environment
  from jinja2.utils import Markup
label_desc: Use image node_id 25 for calling a global function with example usage: test_sum_attributes_tuple(env_async) without return types