docstr: Test that ops with a period of 2 raised to a non-integer power raise an error.
docstr_tok: ["Test","that","ops","with","a","period","of","2","raised","to","a","non-integer","power","raise","an","error","."]
code: def test_period_two_noninteger_power(self, op):
      """Test that ops with a period of 2 raised to a non-integer power raise an error."""
      if isinstance(op, (qml.PauliZ, qml.CZ)):
          pytest.skip("PauliZ can be raised to any power.")
      with pytest.raises(qml.operation.PowUndefinedError):
          op.pow(1.234)
  
      if op.__class__ is qml.CZ:
          pytest.skip("CZ can be raised to any power.")
      with pytest.raises(qml.operation.PowUndefinedError):
          op.pow(1.234)
  
imports: import copy
  import numpy
  import pytest
  from scipy.linalg import fractional_matrix_power
  from scipy.sparse import csr_matrix
  from scipy.stats import unitary_group
  from gate_data import CY, CZ
  import pennylane
  from pennylane.wires import Wires
  from pennylane.operation import AnyWires
  from pennylane.ops.qubit.matrix_ops import QubitUnitary
label_desc: Use image node_id 3 for calling the TestPowMethod obj's underlying member method code with example usage: obj.test_period_two_noninteger_power(op) without return types