code: def test_get_loc_length_one_interval(
      self, left, right, closed, other_closed
  ):
      # GH 20921
      index = IntervalIndex.from_tuples([(0, 5)], closed=closed)
      interval = Interval(left, right, closed=other_closed)
      if interval == index[0]:
          result = index.get_loc(interval)
          assert result == 0
      else:
          with pytest.raises(
              KeyError,
              match=re.escape(
                  f"Interval({left}, {right}, closed='{other_closed}')"
              ),
          ):
              index.get_loc(interval)
  
imports: import re
  import numpy
  import pytest
  from pandas.errors import InvalidIndexError
  from pandas import NA, CategoricalIndex, DatetimeIndex, Index, Interval, IntervalIndex, MultiIndex, NaT, Timedelta, Timestamp, array, date_range, interval_range, isna, period_range, timedelta_range
  import pandas._testing
label_desc: Use image node_id 4 for calling the TestGetLoc obj's underlying member method code with example usage: obj.test_get_loc_length_one_interval(left, right, closed, other_closed) without return types