code: def obs_fixture():
      """A fixture of observables to go after the queue fixture."""
      return [
          qml.expval(qml.PauliX(wires=0)),
          qml.expval(qml.Hermitian(np.identity(4), wires=[1, 2])),
      ]
  
imports: import io
  import contextlib
  import numpy
  import pytest
  import pennylane
  from pennylane import numpy
  from pennylane.resource import ResourcesOperation, Resources
  from pennylane.circuit_graph import CircuitGraph
  from pennylane.wires import Wires
label_desc: Use image node_id 2 for calling a global function with example usage: obs_fixture() and returns: list