Squashed commit of the following:

commit bccfc3f
Merge: d65980e 9caf048
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 13:47:48 2018 -0500

    Merge remote-tracking branch 'upstream/master' into period-dtype-type

commit 9caf048
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 13:25:22 2018 -0500

    CI: change windows vm image (pandas-dev#22948)

commit d65980e
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 11:46:38 2018 -0500

    typo

commit e5c61fc
Merge: d7a8e1b 1d9f76c
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 10:57:59 2018 -0500

    Merge remote-tracking branch 'upstream/master' into period-dtype-type

commit d7a8e1b
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 10:57:56 2018 -0500

    Fixed

commit 598cc62
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 10:32:22 2018 -0500

    doc note

commit 83db05c
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 10:28:52 2018 -0500

    updates

commit 1d9f76c
Author: Joris Van den Bossche <[email protected]>
Date:   Tue Oct 2 17:11:11 2018 +0200

    CLN: remove Index._to_embed (pandas-dev#22879)

    * CLN: remove Index._to_embed

    * pep8

commit 6247da0
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 08:50:41 2018 -0500

    Provide default implementation for `data_repated` (pandas-dev#22935)

commit f07ab80
Author: Tom Augspurger <[email protected]>
Date:   Tue Oct 2 06:22:27 2018 -0500

    str, bytes

commit 8a8bdb0
Author: Tom Augspurger <[email protected]>
Date:   Mon Oct 1 21:40:59 2018 -0500

    import at top

commit 99bafdd
Author: Tom Augspurger <[email protected]>
Date:   Mon Oct 1 21:38:12 2018 -0500

    Update type for PeriodDtype

    Removed unused IntervalDtypeType

commit 5ce06b5
Author: Matthew Roeschke <[email protected]>
Date:   Mon Oct 1 14:22:20 2018 -0700

     BUG: to_datetime preserves name of Index argument in the result (pandas-dev#22918)

    * BUG: to_datetime preserves name of Index argument in the result

    * correct test
Merge branch 'datetimelike-tshift' into ea-period

Author: TomAugspurger

pandas/core/arrays/datetimelike.py

@@ -455,7 +455,7 @@ def _sub_period_array(self, other):
     def _addsub_int_array(self, other, op):
         """
         Add or subtract array-like of integers equivalent to applying
-        `_tshift` pointwise.
+        `_time_shift` pointwise.
 
         Parameters
         ----------
@@ -552,9 +552,9 @@ def shift(self, periods, freq=None):
         --------
         Index.shift : Shift values of Index.
         """
-        return self._tshift(periods, freq=freq)
+        return self._time_shift(periods=periods, freq=freq)
 
-    def _tshift(self, periods, freq=None):
+    def _time_shift(self, periods, freq=None):
         """
         Shift each value by `periods`.
 
@@ -616,7 +616,7 @@ def __add__(self, other):
             elif lib.is_integer(other):
                 # This check must come after the check for np.timedelta64
                 # as is_integer returns True for these
-                result = self._tshift(other)
+                result = self._time_shift(other)
 
             # array-like others
             elif is_timedelta64_dtype(other):
@@ -668,7 +668,7 @@ def __sub__(self, other):
             elif lib.is_integer(other):
                 # This check must come after the check for np.timedelta64
                 # as is_integer returns True for these
-                result = self._tshift(-other)
+                result = self._time_shift(-other)
             elif isinstance(other, Period):
                 result = self._sub_period(other)
 

pandas/core/arrays/period.py

@@ -572,7 +572,7 @@ def _add_offset(self, other):
         if base != self.freq.rule_code:
             msg = DIFFERENT_FREQ_INDEX.format(self.freqstr, other.freqstr)
             raise IncompatibleFrequency(msg)
-        return self._tshift(other.n)
+        return self._time_shift(other.n)
 
     def _add_delta_td(self, other):
         assert isinstance(other, (timedelta, np.timedelta64, Tick))
@@ -582,7 +582,7 @@ def _add_delta_td(self, other):
         if isinstance(own_offset, Tick):
             offset_nanos = delta_to_nanoseconds(own_offset)
             if np.all(nanos % offset_nanos == 0):
-                return self._tshift(nanos // offset_nanos)
+                return self._time_shift(nanos // offset_nanos)
 
         # raise when input doesn't have freq
         raise IncompatibleFrequency("Input has different freq from "
@@ -592,7 +592,7 @@ def _add_delta_td(self, other):
 
     def _add_delta(self, other):
         ordinal_delta = self._maybe_convert_timedelta(other)
-        return self._tshift(ordinal_delta)
+        return self._time_shift(ordinal_delta)
 
     def shift(self, periods=1):
         """
@@ -612,7 +612,7 @@ def shift(self, periods=1):
         # then just call super.
         return ExtensionArray.shift(self, periods)
 
-    def _tshift(self, n, freq=None):
+    def _time_shift(self, n, freq=None):
         """
         Shift each value by `periods`.