code: def _get_expected_exception(self, op_name, obj, other):
      if op_name in ["__sub__", "__rsub__"]:
          return None
      return super()._get_expected_exception(op_name, obj, other)
  
imports: import numpy
  import pytest
  from pandas.core.dtypes.dtypes import DatetimeTZDtype
  import pandas
  import pandas._testing
  from pandas.core.arrays import DatetimeArray
  from pandas.tests.extension import base
label_desc: Use image node_id 1 for calling the TestDatetimeArray obj's underlying member method code with example usage: obj._get_expected_exception(op_name, obj, other) and returns: super, None