code: def test_difference(idx, sort):
      first = idx
      result = first.difference(idx[-3:], sort=sort)
      vals = idx[:-3].values
  
      if sort is None:
          vals = sorted(vals)
  
      expected = MultiIndex.from_tuples(
          vals, sortorder=0, names=idx.names
      )
  
      assert isinstance(result, MultiIndex)
      assert result.equals(expected)
      assert result.names == idx.names
      tm.assert_index_equal(result, expected)
  
      # empty difference: reflexive
      result = idx.difference(idx, sort=sort)
      expected = idx[:0]
      assert result.equals(expected)
      assert result.names == idx.names
  
      # empty difference: superset
      result = idx[-3:].difference(idx, sort=sort)
      expected = idx[:0]
      assert result.equals(expected)
      assert result.names == idx.names
  
      # empty difference: degenerate
      result = idx[:0].difference(idx, sort=sort)
      expected = idx[:0]
      assert result.equals(expected)
      assert result.names == idx.names
  
      # names not the same
      chunklet = idx[-3:]
      chunklet.names = ["foo", "baz"]
      result = first.difference(chunklet, sort=sort)
      assert result.names == (None, None)
  
      # empty, but non-equal
      result = idx.difference(idx.sortlevel(1)[0], sort=sort)
      assert len(result) == 0
  
      # raise Exception called with non-MultiIndex
      result = first.difference(first.values, sort=sort)
      assert result.equals(first[:0])
  
      # name from empty array
      result = first.difference([], sort=sort)
      assert first.equals(result)
      assert first.names == result.names
  
      # name from non-empty array
      result = first.difference([("foo", "one")], sort=sort)
      expected = MultiIndex.from_tuples(
          [
              ("bar", "one"),
              ("baz", "two"),
              ("foo", "two"),
              ("qux", "one"),
              ("qux", "two"),
          ]
      )
      expected.names = first.names
      assert first.names == result.names
  
      msg = "other must be a MultiIndex or a list of tuples"
      with pytest.raises(TypeError, match=msg):
          first.difference([1, 2, 3, 4, 5], sort=sort)
  
imports: import numpy
  import pytest
  import pandas
  from pandas import CategoricalIndex, DataFrame, Index, IntervalIndex, MultiIndex, Series
  import pandas._testing
  from pandas.api.types import is_float_dtype, is_unsigned_integer_dtype
label_desc: Use image node_id 8 for calling a global function with example usage: test_difference(idx, sort) without return types