correct wrong if statement in crosstab and add tests for #35144

Author: CloseChoice

pandas/core/reshape/pivot.py

@@ -673,7 +673,7 @@ def _normalize(table, normalize, margins: bool, margins_name="All"):
 
         # check if margin name is in (for MI cases) or equal to last
         # index/column and save the column and index margin
-        if (margins_name not in table.iloc[-1, :].name) | (
+        if (margins_name not in table.iloc[-1, :].name) & (
             margins_name != table.iloc[:, -1].name
         ):
             raise ValueError(f"{margins_name} not in pivoted DataFrame")

pandas/tests/reshape/test_crosstab.py

@@ -698,3 +698,26 @@ def test_margin_normalize(self):
             names=["A", "B"],
         )
         tm.assert_frame_equal(result, expected)
+
+    def test_crosstab_multiple_columns_normalize(self):
+        df = DataFrame({"A": ["foo", "foo", "foo", "foo", "foo",
+                                 "bar", "bar", "bar", "bar"],
+                           "B": ["one", "one", "one", "two", "two",
+                                 "one", "one", "two", "two"],
+                           "C": ["small", "large", "large", "small",
+                                 "small", "large", "small", "small",
+                                 "large"],
+                           "D": [1, 2, 2, 3, 3, 4, 5, 6, 7],
+                           "E": [2, 4, 5, 5, 6, 6, 8, 9, 9]})
+        result = crosstab(index=df.C,
+                    columns=[df.A, df.B],
+                    margins=True,
+                    margins_name='margin', normalize=True)
+        expected = DataFrame([[0.111111, 0.111111, 0.222222, 0.000000, 0.444444],
+                                 [0.111111, 0.111111, 0.111111, 0.222222, 0.555556],
+                                 [0.222222, 0.222222, 0.333333, 0.222222, 1.]],
+                                index=['large', 'small', 'margin'])
+        expected.columns = MultiIndex( levels=[['bar', 'foo', 'margin'], ['', 'one', 'two']], codes=[[0, 0, 1, 1, 2], [1, 2, 1, 2, 0]], names=["A", "B"], )
+        expected.index.name = 'C'
+        tm.assert_frame_equal(result, expected)
+