TST: unit test on indexing single column

Author: wesm

pandas/core/generic.py

@@ -169,7 +169,14 @@ def drop(self, labels, axis=0):
 
 
 class NDFrame(PandasObject):
-
+    """
+
+    Parameters
+    ----------
+    data : BlockManager
+    axes : list
+    copy : boolean, default False
+    """
     # kludge
     _default_stat_axis = 0
 

pandas/tests/test_frame.py

@@ -124,6 +124,15 @@ def test_setitem_boolean(self):
         expected.values[mask.values] = nan
         assert_frame_equal(df, expected)
 
+    def test_setitem_boolean_column(self):
+        expected = self.frame.copy()
+        mask = self.frame['A'] > 0
+
+        self.frame.ix[mask, 'B'] = 0
+        expected.values[mask, 1] = 0
+
+        assert_frame_equal(self.frame, expected)
+
     def test_setitem_corner(self):
         # corner case
         df = DataFrame({'B' : [1., 2., 3.],