code: def circuit_measure_max_once():
      """A fixture of a circuit that measures wire 0 once."""
      return qml.expval(qml.PauliX(wires=0))
  
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 5 for calling a global function with example usage: circuit_measure_max_once() and returns: qml