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Add simple attribute access to DataFrame columns #213

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8 changes: 8 additions & 0 deletions pandas/core/frame.py
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Original file line number Diff line number Diff line change
Expand Up @@ -860,6 +860,14 @@ def _getitem_single(self, key):
res = Series(values, index=self.index, name=key)
self._series_cache[key] = res
return res

def __getattr__(self, name):
"""After regular attribute access, try looking up the name of a column.
This allows simpler access to columns for interactive use."""
if name in self.columns:
return self[name]
raise AttributeError("'%s' object has no attribute '%s'" % \
(type(self).__name__, name))

def __setitem__(self, key, value):
# support boolean setting with DataFrame input, e.g.
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4 changes: 4 additions & 0 deletions pandas/tests/test_frame.py
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Expand Up @@ -67,6 +67,10 @@ def test_getitem_boolean(self):

subframe_obj = self.tsframe[indexer_obj]
assert_frame_equal(subframe_obj, subframe)

def test_getattr(self):
tm.assert_series_equal(self.frame.A, self.frame['A'])
self.assertRaises(AttributeError, getattr, self.frame, 'NONEXISTENT_NAME')

def test_setitem(self):
# not sure what else to do here
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