def test_inplace_mutation_resets_values(): levels = [["a", "b", "c"], [4]] levels2 = [[1, 2, 3], ["a"]] codes = [[0, 1, 0, 2, 2, 0], [0, 0, 0, 0, 0, 0]] mi1 = MultiIndex(levels=levels, codes=codes) mi2 = MultiIndex(levels=levels2, codes=codes) vals = mi1.values.copy() vals2 = mi2.values.copy() assert mi1._tuples is not None # Make sure level setting works new_vals = mi1.set_levels(levels2).values tm.assert_almost_equal(vals2, new_vals) # Non-inplace doesn't kill _tuples [implementation detail] tm.assert_almost_equal(mi1._tuples, vals) # ...and values is still same too tm.assert_almost_equal(mi1.values, vals) # Inplace should kill _tuples mi1.set_levels(levels2, inplace=True) tm.assert_almost_equal(mi1.values, vals2) # Make sure label setting works too codes2 = [[0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0]] exp_values = np.empty((6,), dtype=object) exp_values[:] = [(1, "a")] * 6 # Must be 1d array of tuples assert exp_values.shape == (6,) new_values = mi2.set_codes(codes2).values # Not inplace shouldn't change tm.assert_almost_equal(mi2._tuples, vals2) # Should have correct values tm.assert_almost_equal(exp_values, new_values) # ...and again setting inplace should kill _tuples, etc mi2.set_codes(codes2, inplace=True) tm.assert_almost_equal(mi2.values, new_values)
def test_inplace_mutation_resets_values(): levels = [['a', 'b', 'c'], [4]] levels2 = [[1, 2, 3], ['a']] codes = [[0, 1, 0, 2, 2, 0], [0, 0, 0, 0, 0, 0]] mi1 = MultiIndex(levels=levels, codes=codes) mi2 = MultiIndex(levels=levels2, codes=codes) vals = mi1.values.copy() vals2 = mi2.values.copy() assert mi1._tuples is not None # Make sure level setting works new_vals = mi1.set_levels(levels2).values tm.assert_almost_equal(vals2, new_vals) # Non-inplace doesn't kill _tuples [implementation detail] tm.assert_almost_equal(mi1._tuples, vals) # ...and values is still same too tm.assert_almost_equal(mi1.values, vals) # Inplace should kill _tuples mi1.set_levels(levels2, inplace=True) tm.assert_almost_equal(mi1.values, vals2) # Make sure label setting works too codes2 = [[0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0]] exp_values = np.empty((6,), dtype=object) exp_values[:] = [(long(1), 'a')] * 6 # Must be 1d array of tuples assert exp_values.shape == (6,) new_values = mi2.set_codes(codes2).values # Not inplace shouldn't change tm.assert_almost_equal(mi2._tuples, vals2) # Should have correct values tm.assert_almost_equal(exp_values, new_values) # ...and again setting inplace should kill _tuples, etc mi2.set_codes(codes2, inplace=True) tm.assert_almost_equal(mi2.values, new_values)
def test_inplace_mutation_resets_values(): levels = [["a", "b", "c"], [4]] levels2 = [[1, 2, 3], ["a"]] codes = [[0, 1, 0, 2, 2, 0], [0, 0, 0, 0, 0, 0]] mi1 = MultiIndex(levels=levels, codes=codes) mi2 = MultiIndex(levels=levels2, codes=codes) # instantiating MultiIndex should not access/cache _.values assert "_values" not in mi1._cache assert "_values" not in mi2._cache vals = mi1.values.copy() vals2 = mi2.values.copy() # accessing .values should cache ._values assert mi1._values is mi1._cache["_values"] assert mi1.values is mi1._cache["_values"] assert isinstance(mi1._cache["_values"], np.ndarray) # Make sure level setting works new_vals = mi1.set_levels(levels2).values tm.assert_almost_equal(vals2, new_vals) # Non-inplace doesn't drop _values from _cache [implementation detail] tm.assert_almost_equal(mi1._cache["_values"], vals) # ...and values is still same too tm.assert_almost_equal(mi1.values, vals) # Inplace should drop _values from _cache with tm.assert_produces_warning(FutureWarning): mi1.set_levels(levels2, inplace=True) assert "_values" not in mi1._cache tm.assert_almost_equal(mi1.values, vals2) # Make sure label setting works too codes2 = [[0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0]] exp_values = np.empty((6,), dtype=object) exp_values[:] = [(1, "a")] * 6 # Must be 1d array of tuples assert exp_values.shape == (6,) new_mi = mi2.set_codes(codes2) assert "_values" not in new_mi._cache new_values = new_mi.values assert "_values" in new_mi._cache # Not inplace shouldn't change tm.assert_almost_equal(mi2._cache["_values"], vals2) # Should have correct values tm.assert_almost_equal(exp_values, new_values) # ...and again setting inplace should drop _values from _cache, etc with tm.assert_produces_warning(FutureWarning): mi2.set_codes(codes2, inplace=True) assert "_values" not in mi2._cache tm.assert_almost_equal(mi2.values, new_values) assert "_values" in mi2._cache