code: def test_stopwatch_hours():
      w = lku.Stopwatch()
      w.stop()
      w.start_time = w.stop_time - 3663
      s = str(w)
      p = re.compile(r"1h1m3.\d\ds")
      assert p.match(s)
  
file_path: lkpy/tests/test_util.py
imports: import time
  import re
  import pathlib
  import numpy
  import pandas
  from lenskit import util
label_desc: Use image node_id 7 for calling a global function with example usage: test_stopwatch_hours() without return types