Problem from issue fixed

Signed-off-by: kevkle <kevin.klein@hotmail.com>

Author: kevkle

pandas/core/generic.py

@@ -606,7 +606,6 @@ def _get_cleaned_column_resolvers(self) -> dict[Hashable, Series]:
                 v, copy=False, index=self.index, name=k, dtype=dtype
             ).__finalize__(self)
             for k, v, dtype in zip(self.columns, self._iter_column_arrays(), dtypes)
-            if not isinstance(k, int)
         }
 
     @final

pandas/tests/frame/test_query_eval.py

@@ -1326,6 +1326,11 @@ def test_unneeded_quoting(self, df):
         expect = df[df["A"] > 2]
         tm.assert_frame_equal(res, expect)
 
+    def test_quoting_with_ints(self, df):
+        res = df.query("`1` > 5")
+        expect = df[df[1] > 5]
+        tm.assert_frame_equal(res, expect)
+
     def test_parenthesis(self, df):
         res = df.query("`A (x)` > 2")
         expect = df[df["A (x)"] > 2]