bug in py2.7 duplicate indexing

Author: jreback

pandas/index.pyx

@@ -182,7 +182,7 @@ cdef class IndexEngine:
  Py_ssize_t i, n
  int last_true
 
- values = self._get_index_values()
+ values = np.array(self._get_index_values(), copy=False)
  n = len(values)
 
  result = np.empty(n, dtype=bool)

pandas/tests/indexes/test_multi.py

@@ -1117,6 +1117,17 @@ def test_get_loc_duplicates(self):
  xp = 0
  assert (rs == xp)
 
+ def test_get_value_duplicates(self):
+ index = MultiIndex(levels=[['D', 'B', 'C'],
+ [0, 26, 27, 37, 57, 67, 75, 82]],
+ labels=[[0, 0, 0, 1, 2, 2, 2, 2, 2, 2],
+ [1, 3, 4, 6, 0, 2, 2, 3, 5, 7]],
+ names=['tag', 'day'])
+
+ assert index.get_loc('D') == slice(0, 3)
+ with pytest.raises(KeyError):
+ index._engine.get_value(np.array([]), 'D')
+
  def test_get_loc_level(self):
  index = MultiIndex(levels=[Index(lrange(4)), Index(lrange(4)), Index(
  lrange(4))], labels=[np.array([0, 0, 1, 2, 2, 2, 3, 3]), np.array(

pandas/tests/indexing/test_multiindex.py

@@ -413,9 +413,10 @@ def f():
  df.loc[idx[:, :, 'Stock'], 'price'] *= 2
  tm.assert_frame_equal(df, expected)
 
- def test_getitem_multiindex(self):
+ def test_getitem_duplicates_multiindex(self):
  # GH 5725 the 'A' happens to be a valid Timestamp so the doesn't raise
  # the appropriate error, only in PY3 of course!
+
  index = MultiIndex(levels=[['D', 'B', 'C'],
  [0, 26, 27, 37, 57, 67, 75, 82]],
  labels=[[0, 0, 0, 1, 2, 2, 2, 2, 2, 2],