code: def test_elements() -> None:
      import bokeh.sampledata.periodic_table as bsp
  
      assert isinstance(bsp.elements, pd.DataFrame)
  
      # check detail for package data
      assert len(bsp.elements) == 118
  
imports: from __future__ import annotations
  import pytest
  import pandas
  from tests.support.util.api import verify_all
label_desc: Use image node_id 1 for calling a global function with example usage: test_elements() without return types