class_docstr: Tests for the pow method of non-parametric qutrit operations.
docstr: Tests that ops with a period ==3 raise a PowUndefinedError when raised
  to a power that is 2+multiple of three.
docstr_tok: ["Tests","that","ops","with","a","period","==3","raise","a","PowUndefinedError","when","raised","to","a","power","that","is","2+multiple","of","three","."]
code: def test_period_three_ops_pow_offset_2(self, op, offset):
      """Tests that ops with a period ==3 raise a PowUndefinedError when raised
      to a power that is 2+multiple of three."""
  
      # When raising to power == 2 mod 3
      with pytest.raises(qml.operation.PowUndefinedError):
          op.pow(2 + offset)
  
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 3 for calling the TestPowMethod obj's underlying member method code with example usage: obj.test_period_three_ops_pow_offset_2(op, offset) without return types