code: def test_six_fractional_second_digits():
      actual = timex.parse_rfc3339("2022-12-27T16:48:06.123456Z")
  
      tzinfo = datetime.timezone.utc
      expected = datetime.datetime(
          2022, 12, 27, 16, 48, 6, 123456, tzinfo
      )
      assert actual == expected
  
file_path: hail/hail/python/test/hailtop/test_timex.py
imports: from hailtop import timex
  import datetime
label_desc: Use image node_id 10 for calling a global function with example usage: test_six_fractional_second_digits() without return types