code: def test_isoparser_byte_sep():
      dt = datetime(2017, 12, 6, 12, 30, 45)
      dt_str = dt.isoformat(sep=str("T"))
  
      dt_rt = isoparser(sep=b"T").isoparse(dt_str)
  
      assert dt == dt_rt
  
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 21 for calling a global function with example usage: test_isoparser_byte_sep() without return types