Merge pull request #11822 from kawochen/BUG-FIX-11808

BUG: GH11808 subclasses of DataFrame did not propagate AttributeError

Author: jreback

doc/source/whatsnew/v0.18.0.txt

@@ -206,7 +206,8 @@ Bug Fixes
 
 
 
-- Bug groupby on tz-aware data where selection not returning ``Timestamp`` (:issue:`11616`
+- Bug in subclasses of `DataFrame` where `AttributeError` did not propagate (:issue:`11808`)
+- Bug groupby on tz-aware data where selection not returning ``Timestamp`` (:issue:`11616`)
 - Bug in ``pd.read_clipboard`` and ``pd.to_clipboard`` functions not supporting Unicode; upgrade included ``pyperclip`` to v1.5.15 (:issue:`9263`)
 
 

pandas/core/generic.py

@@ -2356,8 +2356,7 @@ def __getattr__(self, name):
         else:
             if name in self._info_axis:
                 return self[name]
-            raise AttributeError("'%s' object has no attribute '%s'" %
-                                 (type(self).__name__, name))
+            return object.__getattribute__(self, name)
 
     def __setattr__(self, name, value):
         """After regular attribute access, try setting the name

pandas/tests/test_frame.py

@@ -15878,6 +15878,17 @@ class SubclassedPanel(Panel):
                                    dtype='int64')
         tm.assert_panel_equal(result, expected)
 
+    def test_subclass_attr_err_propagation(self):
+        # GH 11808
+        class A(DataFrame):
+
+            @property
+            def bar(self):
+                return self.i_dont_exist
+        with tm.assertRaisesRegexp(AttributeError, '.*i_dont_exist.*'):
+            A().bar
+
+
 def skip_if_no_ne(engine='numexpr'):
     if engine == 'numexpr':
         try: