BUG: array/list of tz-aware of datetime.datetime -> DatetimeIndex getting over-localized. close #1790

Author: wesm

pandas/tseries/index.py

@@ -195,6 +195,10 @@ def __new__(cls, data=None,
             else:
                 data = tools.to_datetime(data)
                 data.offset = offset
+                if isinstance(data, DatetimeIndex):
+                    if name is not None:
+                        data.name = name
+                    return data
 
         if issubclass(data.dtype.type, basestring):
             subarr = _str_to_dt_array(data, offset, dayfirst=dayfirst,

pandas/tseries/tests/test_timezones.py

@@ -437,6 +437,13 @@ def test_date_range_span_dst_transition(self):
         dr = date_range('2012-11-02', periods=10, tz='US/Eastern')
         self.assert_((dr.hour == 0).all())
 
+    def test_convert_datetime_list(self):
+        dr = date_range('2012-06-02', periods=10, tz='US/Eastern')
+
+        dr2 = DatetimeIndex(list(dr), name='foo')
+        self.assert_(dr.equals(dr2))
+        self.assert_(dr.tz == dr2.tz)
+        self.assert_(dr2.name == 'foo')
 
 class TestTimeZones(unittest.TestCase):