code: def test_period_comparison_nat(self):
      per = Period("2011-01-01", freq="D")
  
      ts = Timestamp("2011-01-01")
      # confirm Period('NaT') work identical with Timestamp('NaT')
      for left, right in [
          (NaT, per),
          (per, NaT),
          (NaT, ts),
          (ts, NaT),
      ]:
          assert not left < right
          assert not left > right
          assert not left == right
          assert left != right
          assert not left <= right
          assert not left >= right
  
imports: from datetime import timedelta
  import numpy
  import pytest
  from pandas._libs.tslibs.period import IncompatibleFrequency
  from pandas import NaT, Period, Timedelta, Timestamp, offsets
label_desc: Use image node_id 5 for calling the TestPeriodComparisons obj's underlying member method code with example usage: obj.test_period_comparison_nat() without return types