class_docstr: Tests the pauli_decompose function
docstr: Tests that there are no Identity observables in the tensor products
  when hide_identity=True
docstr_tok: ["Tests","that","there","are","no","Identity","observables","in","the","tensor","products","when","hide_identity=True"]
code: def test_hide_identity_true(self):
      """Tests that there are no Identity observables in the tensor products
      when hide_identity=True"""
      H = np.array(np.diag([0, 0, 0, 1]))
      _, obs_list = qml.pauli_decompose(H, hide_identity=True).terms()
      tensors = filter(lambda obs: isinstance(obs, Tensor), obs_list)
  
      for tensor in tensors:
          all_identities = all(
              isinstance(o, Identity) for o in tensor.obs
          )
          no_identities = not any(
              isinstance(o, Identity) for o in tensor.obs
          )
          assert all_identities or no_identities
  
imports: import pytest
  import numpy
  import pennylane
  from pennylane.operation import Tensor
  from pennylane.ops import Identity, PauliX, PauliY, PauliZ
  from pennylane.pauli import pauli_sentence, PauliWord, PauliSentence
  from pennylane.pauli.conversion import _generalized_pauli_decompose
label_desc: Use image node_id 3 for calling the TestDecomposition obj's underlying member method code with example usage: obj.test_hide_identity_true() without return types