Fix : #58748 BUG: eval fails for ExtensionArray

doc/source/whatsnew/v3.0.0.rst

@@ -606,6 +606,7 @@ Other
 - Bug in :meth:`Series.replace` and :meth:`DataFrame.replace` inconsistently replacing matching instances when ``regex=True`` and missing values are present. (:issue:`56599`)
 - Bug in Dataframe Interchange Protocol implementation was returning incorrect results for data buffers' associated dtype, for string and datetime columns (:issue:`54781`)
 - Bug in ``Series.list`` methods not preserving the original :class:`Index`. (:issue:`58425`)
+- Bug in :func:`eval` including division ``\`` failed with a ``TypeError``. (:issue:`58748`)
 
 .. ***DO NOT USE THIS SECTION***
 

pandas/core/computation/ops.py

@@ -19,6 +19,7 @@
 
 from pandas.core.dtypes.common import (
     is_list_like,
+    is_numeric_dtype,
     is_scalar,
 )
 
@@ -508,10 +509,6 @@ def _disallow_scalar_only_bool_ops(self) -> None:
             raise NotImplementedError("cannot evaluate scalar only bool ops")
 
 
-def isnumeric(dtype) -> bool:
-    return issubclass(np.dtype(dtype).type, np.number)
-
-
 class Div(BinOp):
     """
     Div operator to special case casting.
@@ -525,7 +522,9 @@ class Div(BinOp):
     def __init__(self, lhs, rhs) -> None:
         super().__init__("/", lhs, rhs)
 
-        if not isnumeric(lhs.return_type) or not isnumeric(rhs.return_type):
+        if not is_numeric_dtype(lhs.return_type) or not is_numeric_dtype(
+            rhs.return_type
+        ):
             raise TypeError(
                 f"unsupported operand type(s) for {self.op}: "
                 f"'{lhs.return_type}' and '{rhs.return_type}'"

pandas/tests/frame/test_query_eval.py

@@ -203,6 +203,15 @@ def test_eval_simple(self, engine, parser):
         tm.assert_series_equal(expected, res)
 
 
+class TestDataFrameEvalWithMultiIndex:
+    def test_extension_array_eval(self, engine, parser):
+        # GH#58748
+        df = DataFrame({"a": pd.array([1, 2, 3]), "b": pd.array([4, 5, 6])})
+        result = df.eval("a / b", engine=engine, parser=parser)
+        expected = Series([0.25, 0.40, 0.50])
+        tm.assert_series_equal(result, expected)
+
+
 class TestDataFrameQueryWithMultiIndex:
     def test_query_with_named_multiindex(self, parser, engine):
         skip_if_no_pandas_parser(parser)