Add test_call_non_named_expression

Author: alexmojaki

pandas/tests/frame/test_query_eval.py

@@ -1176,3 +1176,17 @@ def test_failing_character_outside_range(self, df):
     def test_failing_hashtag(self, df):
         with pytest.raises(SyntaxError):
             df.query("`foo#bar` > 4")
+
+    def test_call_non_named_expression(self, df):
+        def func(*_):
+            return 1
+
+        funcs = [func]
+
+        df.eval("@func()")
+
+        with pytest.raises(TypeError):
+            df.eval("@funcs[0]()")
+
+        with pytest.raises(TypeError):
+            df.eval("@funcs[0].__call__()")