code: def test_molecular_descriptors(chemdf):
      """Test conversion of Mol objects to 39 column molecular descriptors."""
      mol_desc = chemdf.smiles2mol(
          "smiles", "mol"
      ).molecular_descriptors("mol")
      assert mol_desc.shape == (10, 39)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_molecular_descriptors(chemdf) without return types