code: def test_tooltip_ignored(styler):
      # GH 21266
      result = styler.to_html()  # no set_tooltips() creates no <span>
      assert '<style type="text/css">\n</style>' in result
      assert '<span class="pd-t"></span>' not in result
  
file_path: pandas/pandas/tests/io/formats/style/test_tooltip.py
imports: import numpy
  import pytest
  from pandas import DataFrame
  from pandas.io.formats.style import Styler
label_desc: Use image node_id 4 for calling a global function with example usage: test_tooltip_ignored(styler) without return types