class_docstr: Tests for the pow method of non-parametric qutrit operations.
docstr: Tests that ops with period == 3 return an empty list when raised to a
  power that's a multiple of 3.
docstr_tok: ["Tests","that","ops","with","period","==","3","return","an","empty","list","when","raised","to","a","power","that","'s","a","multiple","of","3","."]
code: def test_period_three_ops_pow_multiple_of_3(self, op, offset):
      """Tests that ops with period == 3 return an empty list when raised to a
      power that's a multiple of 3."""
  
      assert len(op.pow(0 + offset)) == 0
  
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 1 for calling the TestPowMethod obj's underlying member method code with example usage: obj.test_period_three_ops_pow_multiple_of_3(op, offset) without return types