BUG: PeriodIndex slicing by datetime fails when either end out-of-bounds #1977

Author: changhiskhan

pandas/tseries/period.py

@@ -889,6 +889,15 @@ def slice_locs(self, start=None, end=None):
             except KeyError:
                 pass
 
+        if isinstance(start, datetime) and isinstance(end, datetime):
+            ordinals = self.values
+            t1 = Period(start, freq=self.freq)
+            t2 = Period(end, freq=self.freq)
+
+            left = ordinals.searchsorted(t1.ordinal, side='left')
+            right = ordinals.searchsorted(t2.ordinal, side='right')
+            return left, right
+
         return Int64Index.slice_locs(self, start, end)
 
     def _get_string_slice(self, key):

pandas/tseries/tests/test_period.py

@@ -1175,6 +1175,16 @@ def test_getitem_partial(self):
         result = ts['2008':'2009']
         self.assertEquals(len(result), 24)
 
+    def test_getitem_datetime(self):
+        rng = period_range(start='2012-01-01', periods=10, freq='W-MON')
+        ts = Series(range(len(rng)), index=rng)
+
+        dt1 = datetime(2011, 10, 2)
+        dt4 = datetime(2012, 4, 20)
+
+        rs = ts[dt1:dt4]
+        assert_series_equal(rs, ts)
+
     def test_sub(self):
         rng = period_range('2007-01', periods=50)