code: def test_set_index_periodindex(self):
      # GH#6631
      df = DataFrame(np.random.default_rng(2).random(6))
      idx1 = period_range("2011/01/01", periods=6, freq="M")
      idx2 = period_range("2013", periods=6, freq="Y")
  
      df = df.set_index(idx1)
      tm.assert_index_equal(df.index, idx1)
      df = df.set_index(idx2)
      tm.assert_index_equal(df.index, idx2)
  
imports: from datetime import datetime, timedelta
  import numpy
  import pytest
  from pandas import Categorical, CategoricalIndex, DataFrame, DatetimeIndex, Index, MultiIndex, Series, date_range, period_range, to_datetime
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestSetIndexCustomLabelType obj's underlying member method code with example usage: obj.test_set_index_periodindex() without return types