Resolve comments

Author: show981111

pandas/core/reshape/pivot.py

@@ -1163,12 +1163,15 @@ def _normalize(
 
     elif margins is True:
         # keep index and column of pivoted table
-        if table.empty:
-            raise ValueError("Can't get margins since the result dataframe is empty")
 
         table_index = table.index
         table_columns = table.columns
-        last_ind_or_col = table.iloc[-1, :].name
+        try:
+            last_ind_or_col = table.iloc[-1, :].name
+        except IndexError as err:
+            raise IndexError(
+                "Can't get margins since the result dataframe is empty"
+            ) from err
 
         # check if margin name is not in (for MI cases) and not equal to last
         # index/column and save the column and index margin

pandas/tests/reshape/test_crosstab.py

@@ -877,3 +877,38 @@ def test_categoricals(a_dtype, b_dtype):
         expected = expected.loc[[0, 2, "All"]]
         expected["All"] = expected["All"].astype("int64")
     tm.assert_frame_equal(result, expected)
+
+
+def test_crosstab_empty_result_with_normalize():
+    # https://github.com/pandas-dev/pandas/issues/60768
+    index = ["index1", "index2", "index3"]
+    columns = ["col1", "col2", "col3"]
+    values = [1, 2, 3]
+
+    with pytest.raises(IndexError, match="Can't get margins"):
+        # Raise error when margins=True
+        crosstab(
+            index,
+            columns,
+            values=values,
+            normalize=1,
+            margins=True,
+            dropna=True,
+            aggfunc="skew",
+        )
+
+    # No error when margins=False, just return empty DataFrame
+    result = crosstab(
+        index,
+        columns,
+        values=values,
+        normalize=1,
+        margins=False,
+        dropna=True,
+        aggfunc="skew",
+    )
+    expected = DataFrame(
+        index=Index([], dtype="str", name="row_0"),
+        columns=Index([], dtype="str", name="col_0"),
+    )
+    tm.assert_frame_equal(result, expected)