code: def test_extra_subsecond_digits(dt_str):
      assert isoparse(dt_str) == datetime(2018, 7, 3, 14, 7, 0, 123456)
  
imports: from __future__ import unicode_literals
  from datetime import datetime, timedelta, date, time
  import itertools
  from dateutil import tz
  from dateutil.tz import UTC
  from dateutil.parser import isoparser, isoparse
  import pytest
  import six
label_desc: Use image node_id 10 for calling a global function with example usage: test_extra_subsecond_digits(dt_str) without return types