code: def test_time_creation_blank():
      w = TimePicker()
      assert w.value is None
  
file_path: catboost/contrib/python/ipywidgets/py3/ipywidgets/widgets/tests/test_widget_time.py
imports: import pytest
  import datetime
  from traitlets import TraitError
  from ..widget_time import TimePicker
label_desc: Use image node_id 1 for calling a global function with example usage: test_time_creation_blank() without return types