class_docstr: Test that arithmetic operations involving or creating ParametrizedHamiltonians behave as expected
docstr: Test that two ParametrizedHamiltonians can be added together and
  the H_fixed and H_parametrized terms are correctly combined.
docstr_tok: ["Test","that","two","ParametrizedHamiltonians","can","be","added","together","and","the","H_fixed","and","H_parametrized","terms","are","correctly","combined","."]
code: def test_adding_two_parametrized_hamiltonians(self):
      """Test that two ParametrizedHamiltonians can be added together and
      the H_fixed and H_parametrized terms are correctly combined."""
      pH1 = ParametrizedHamiltonian(
          [1.2, f2], [qml.PauliX(0), qml.PauliY(1)]
      )
      pH2 = ParametrizedHamiltonian(
          [2.3, f1], [qml.Hadamard(2), qml.PauliZ(3)]
      )
  
      # H_fixed now contains the fixed terms from both pH1 and pH2
      new_pH = pH1 + pH2
      assert qml.equal(new_pH.H_fixed()[0], pH1.H_fixed())
      assert qml.equal(new_pH.H_fixed()[1], pH2.H_fixed())
  
      # H_parametrized now contained the parametrized terms from both pH1 and pH2
      parametric_term = new_pH.H_parametrized([1.2, 2.3], 0.5)
      assert qml.equal(
          parametric_term[0], pH1.H_parametrized([1.2], 0.5)
      )
      assert qml.equal(
          parametric_term[1], pH2.H_parametrized([2.3], 0.5)
      )
  
imports: import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.pulse import ParametrizedHamiltonian
  from pennylane.wires import Wires
label_desc: Use image node_id 6 for calling the TestInteractionWithOperators obj's underlying member method code with example usage: obj.test_adding_two_parametrized_hamiltonians() without return types