class_docstr: For testing of AttrTree
class_docstr_tok: ["For","testing","of","AttrTree"]
code: def test_deep_getitem_str(self):
      self.assertEqual(self.tree["A.I"], 1)
      self.assertEqual(self.tree["B.II"], 2)
  
imports: import pytest
  from holoviews.core.element import AttrTree
  from holoviews.element.comparison import ComparisonTestCase
label_desc: Use image node_id 12 for calling the AttrTreeTest obj's underlying member method code with example usage: obj.test_deep_getitem_str() without return types