code: def test_isoformat(ts, timespec, expected_iso):
      assert ts.isoformat(timespec=timespec) == expected_iso
  
file_path: pandas/pandas/tests/scalar/timestamp/test_formats.py
imports: from datetime import datetime
  import pprint
  import dateutil.tz
  import pytest
  import pytz
  from pandas import Timestamp
label_desc: Use image node_id 1 for calling a global function with example usage: test_isoformat(ts, timespec, expected_iso) without return types