class_docstr: Test addition and inclusion of operations and subclasses in attributes.
docstr: Test that we can add operators to the set in multiple ways.
docstr_tok: ["Test","that","we","can","add","operators","to","the","set","in","multiple","ways","."]
code: def test_inclusion_after_addition(self):
      """Test that we can add operators to the set in multiple ways."""
      new_attribute.add("RX")
      new_attribute.add(qml.PhaseShift(0.5, wires=0))
      new_attribute.add(qml.RY)
  
      assert "RX" in new_attribute
      assert "PhaseShift" in new_attribute
      assert "RY" in new_attribute
      assert len(new_attribute) == 8
  
imports: import itertools
  import pytest
  import numpy
  from scipy.stats import unitary_group
  import pennylane
  from pennylane.ops.qubit.attributes import Attribute, has_unitary_generator
  from pennylane.operation import AnyWires
label_desc: Use image node_id 7 for calling the TestAttribute obj's underlying member method code with example usage: obj.test_inclusion_after_addition() without return types