Fix crosstab(aggfunc='skew') bug #60883
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Fix `IndexError` in `crosstab` with `aggfunc=‘skew’`. * Check if table is empty before accessing last row in `_normalize` function in `pandas/core/reshape/pivot.py`. * Skip normalization and return empty table if it is. * Add test case in `pandas/tests/reshape/test_crosstab.py` for `aggfunc=‘skew’`. * Ensure test case doesn’t raise `IndexError`.
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Fix
IndexErrorincrosstabwithaggfunc=‘skew’._normalizefunction inpandas/core/reshape/pivot.py.pandas/tests/reshape/test_crosstab.pyforaggfunc=‘skew’.IndexError.