class_docstr: Tests for the pow method of non-parametric qutrit operations.
code: def test_no_pow_ops(self, op):
      assert len(op.pow(0)) == 0
  
      op_pow = op.pow(1)
      assert len(op_pow) == 1
      assert op_pow[0].__class__ == op.__class__
  
      pows = [0.1, 2, -2, -2.5]
  
      for pow in pows:
          with pytest.raises(qml.operation.PowUndefinedError):
              op.pow(pow)
  
imports: import copy
  import pytest
  import numpy
  from gate_data import TSHIFT, TCLOCK, TADD, TSWAP, TH
  import pennylane
  from pennylane.wires import Wires
label_desc: Use image node_id 6 for calling the TestPowMethod obj's underlying member method code with example usage: obj.test_no_pow_ops(op) without return types