pep8 fixes

Author: mroeschke

pandas/tools/pivot.py

@@ -164,7 +164,7 @@ def pivot_table(data, values=None, index=None, columns=None, aggfunc='mean',
 
     # discard the top level
     if values_passed and not values_multi and not table.empty and \
-        (table.columns.nlevels > 1):
+       (table.columns.nlevels > 1):
         table = table[values[0]]
 
     if len(index) == 0 and len(columns) > 0:

pandas/tools/tests/test_pivot.py

@@ -350,12 +350,12 @@ def _check_output(result, values_col, index=['A', 'B'],
         # no rows
         rtable = self.data.pivot_table(columns=['AA', 'BB'], margins=True,
                                        aggfunc=np.mean)
-        expected = self.data.groupby(['AA','BB']).mean()
+        expected = self.data.groupby(['AA', 'BB']).mean()
         expected.loc[('All', ''), :] = self.data[['DD', 'EE', 'FF']].mean()
         expected = (expected.stack()
                             .unstack(['BB', 'AA'])
                             .stack(['AA', 'BB'])
-                            .to_frame())#this still returns a series
+                            .to_frame())
 
         tm.assert_frame_equal(expected, rtable)
 
@@ -490,7 +490,7 @@ def test_margins_no_values_no_cols(self):
         expected.loc[('All', '')] = expected.sum()
         expected = expected.to_frame()
 
-        tm.assert_frame_equal(result, expected) #need to return dataframe
+        tm.assert_frame_equal(result, expected)
 
     def test_margins_no_values_two_rows(self):
         # Regression test on pivot table: no values passed but rows are a