commit 191e993365ac3206f46132dcf46236471ec54bfa
author Paul Ganssle <pganssle@users.noreply.github.com> Thu Nov 09 16:34:29 2017 -0500
committer Victor Stinner <victor.stinner@gmail.com> Thu Nov 09 13:34:29 2017 -0800
tree 56093f01ed019b5b0d6e3c6b5bc4600721b8438f
parent 72fa3014d5afa5e9ee407dee132991185da33c10

bpo-31222: Make (datetime|date|time).replace return subclass type in Pure Python (#4176)

Lib/datetime.py

diff --git a/Lib/datetime.py b/Lib/datetime.py
index 2f03847..67d8600 100644
--- a/Lib/datetime.py
+++ b/Lib/datetime.py
@@ -828,7 +828,7 @@
             month = self._month
         if day is None:
             day = self._day
-        return date(year, month, day)
+        return type(self)(year, month, day)
 
     # Comparisons of date objects with other.
 
@@ -1316,7 +1316,7 @@
             tzinfo = self.tzinfo
         if fold is None:
             fold = self._fold
-        return time(hour, minute, second, microsecond, tzinfo, fold=fold)
+        return type(self)(hour, minute, second, microsecond, tzinfo, fold=fold)
 
     # Pickle support.
 
@@ -1597,7 +1597,7 @@
             tzinfo = self.tzinfo
         if fold is None:
             fold = self.fold
-        return datetime(year, month, day, hour, minute, second,
+        return type(self)(year, month, day, hour, minute, second,
                           microsecond, tzinfo, fold=fold)
 
     def _local_timezone(self):