code: def test_is_(self):
      create_index = lambda: period_range(
          freq="Y", start="1/1/2001", end="12/1/2009"
      )
      index = create_index()
      assert index.is_(index)
      assert not index.is_(create_index())
      assert index.is_(index.view())
      assert index.is_(index.view().view().view().view().view())
      assert index.view().is_(index)
      ind2 = index.view()
      index.name = "Apple"
      assert ind2.is_(index)
      assert not index.is_(index[:])
      assert not index.is_(index.asfreq("M"))
      assert not index.is_(index.asfreq("Y"))
  
      assert not index.is_(index - 2)
      assert not index.is_(index - 0)
  
file_path: pandas/pandas/tests/indexes/period/test_period.py
imports: import numpy
  import pytest
  from pandas import Index, NaT, Period, PeriodIndex, Series, date_range, offsets, period_range
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestPeriodIndex obj's underlying member method code with example usage: obj.test_is_() without return types