BUG: Fixed bug in selecting month/quarter/year from a series would not select the time element

     on the last day (GH3546_)

Author: jreback

RELEASE.rst

@@ -79,6 +79,8 @@ pandas 0.11.1
     - Fix to_csv to handle non-unique columns (GH3495_)
   - Fixed bug in groupby with empty series referencing a variable before assignment. (GH3510_)
   - Fixed bug in mixed-frame assignment with aligned series (GH3492_)
+  - Fixed bug in selecting month/quarter/year from a series would not select the time element
+    on the last day (GH3546_)
 
 .. _GH3164: https://github.com/pydata/pandas/issues/3164
 .. _GH2786: https://github.com/pydata/pandas/issues/2786
@@ -100,6 +102,7 @@ pandas 0.11.1
 .. _GH3457: https://github.com/pydata/pandas/issues/3457
 .. _GH3477: https://github.com/pydata/pandas/issues/3457
 .. _GH3461: https://github.com/pydata/pandas/issues/3461
+.. _GH3546: https://github.com/pydata/pandas/issues/3546
 .. _GH3468: https://github.com/pydata/pandas/issues/3468
 .. _GH3448: https://github.com/pydata/pandas/issues/3448
 .. _GH3449: https://github.com/pydata/pandas/issues/3449

pandas/tseries/index.py

@@ -1075,16 +1075,16 @@ def _partial_date_slice(self, reso, parsed, use_lhs=True, use_rhs=True):
 
         if reso == 'year':
             t1 = Timestamp(datetime(parsed.year, 1, 1), tz=self.tz)
-            t2 = Timestamp(datetime(parsed.year, 12, 31), tz=self.tz)
+            t2 = Timestamp(datetime(parsed.year, 12, 31, 23, 59, 59, 999999), tz=self.tz)
         elif reso == 'month':
             d = tslib.monthrange(parsed.year, parsed.month)[1]
             t1 = Timestamp(datetime(parsed.year, parsed.month, 1), tz=self.tz)
-            t2 = Timestamp(datetime(parsed.year, parsed.month, d), tz=self.tz)
+            t2 = Timestamp(datetime(parsed.year, parsed.month, d, 23, 59, 59, 999999), tz=self.tz)
         elif reso == 'quarter':
             qe = (((parsed.month - 1) + 2) % 12) + 1  # two months ahead
             d = tslib.monthrange(parsed.year, qe)[1]   # at end of month
             t1 = Timestamp(datetime(parsed.year, parsed.month, 1), tz=self.tz)
-            t2 = Timestamp(datetime(parsed.year, qe, d), tz=self.tz)
+            t2 = Timestamp(datetime(parsed.year, qe, d, 23, 59, 59, 999999), tz=self.tz)
         elif (reso == 'day' and (self._resolution < Resolution.RESO_DAY or not is_monotonic)):
             st = datetime(parsed.year, parsed.month, parsed.day)
             t1 = Timestamp(st, tz=self.tz)

pandas/tseries/tests/test_timeseries.py

@@ -236,6 +236,22 @@ def test_indexing(self):
         result = df['2001']['A']
         assert_series_equal(expected,result)
 
+        # GH3546 (not including times on the last day)
+        idx = date_range(start='2013-05-31 00:00', end='2013-05-31 23:00', freq='H')
+        ts  = Series(range(len(idx)), index=idx)
+        expected = ts['2013-05']
+        assert_series_equal(expected,ts)
+
+        idx = date_range(start='2013-05-31 00:00', end='2013-05-31 23:59', freq='S')
+        ts  = Series(range(len(idx)), index=idx)
+        expected = ts['2013-05']
+        assert_series_equal(expected,ts)
+
+        idx = [ Timestamp('2013-05-31 00:00'), Timestamp(datetime(2013,5,31,23,59,59,999999))]
+        ts  = Series(range(len(idx)), index=idx)
+        expected = ts['2013']
+        assert_series_equal(expected,ts)
+
 def assert_range_equal(left, right):
     assert(left.equals(right))
     assert(left.freq == right.freq)