BUG: fix tz-aware resampling issue. close #2245

Author: wesm

RELEASE.rst

@@ -103,6 +103,8 @@ pandas 0.9.1
   - Fix conversion of mixed-type DataFrame to ndarray with dup columns (#2236)
   - Fix duplicate columns issue (#2218, #2219)
   - Fix SparseSeries.__pow__ issue with NA input (#2220)
+  - Fix icol with integer sequence failure (#2228)
+  - Fixed resampling tz-aware time series issue (#2245)
 
 pandas 0.9.0
 ============

pandas/tseries/resample.py

@@ -110,7 +110,10 @@ def _get_time_bins(self, axis):
 
         first, last = _get_range_edges(axis, self.freq, closed=self.closed,
                                        base=self.base)
-        binner = labels = DatetimeIndex(freq=self.freq, start=first, end=last)
+        tz = axis.tz
+        binner = labels = DatetimeIndex(freq=self.freq,
+                                        start=first.replace(tzinfo=None),
+                                        end=last.replace(tzinfo=None), tz=tz)
 
         # a little hack
         trimmed = False

pandas/tseries/tests/test_resample.py

@@ -823,6 +823,24 @@ def test_resample_tz_localized(self):
         # it works
         result = ts_local.resample('D')
 
+        # #2245
+        idx = date_range('2001-09-20 15:59','2001-09-20 16:00', freq='T',
+                         tz='Australia/Sydney')
+        s = Series([1,2], index=idx)
+
+        result = s.resample('D')
+        ex_index = date_range('2001-09-21', periods=1, freq='D',
+                              tz='Australia/Sydney')
+        expected = Series([1.5], index=ex_index)
+
+        assert_series_equal(result, expected)
+
+        # for good measure
+        result = s.resample('D', kind='period')
+        ex_index = period_range('2001-09-20', periods=1, freq='D')
+        expected = Series([1.5], index=ex_index)
+        assert_series_equal(result, expected)
+
     def test_closed_left_corner(self):
         # #1465
         s = Series(np.random.randn(21),