This checkin backport two checkins by Skip.

backport montanaro's checkin of
    revision 1.24 of calendar.py

make _localized_name instances work more like the tuples they replaced.  In
particular, negative indexes work and they are limited by the actual length
of the names they represent (weekday and month names).  This closes bug
#503202.

[and then]

Corrected _localized_name.__getitem__ based on code in patch 503202 (which I
thought was just a bug report, so didn't notice - doh!).  This handles
slicing, which v 1.23 didn't.

1 files changed, 15 insertions, 6 deletions

diff --git a/Lib/calendar.py b/Lib/calendar.py
index 0fc60be..9af2c93 100644
--- a/Lib/calendar.py
+++ b/Lib/calendar.py
@@ -25,18 +25,27 @@ February = 2
 mdays = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
 
 class _localized_name:
-    def __init__(self, format):
+    def __init__(self, format, len):
         self.format = format
+        self.len = len
     def __getitem__(self, item):
-        return strftime(self.format, (item,)*9).capitalize()
+        if isinstance(item, int):
+            if item < 0: item += self.len
+            if not 0 <= item < self.len:
+                raise IndexError, "out of range"
+            return strftime(self.format, (item,)*9).capitalize()
+        elif isinstance(item, type(slice(0))):
+            return [self[e] for e in range(self.len)].__getslice__(item.start, item.stop)
+    def __len__(self):
+        return self.len
 
 # Full and abbreviated names of weekdays
-day_name = _localized_name('%A')
-day_abbr = _localized_name('%a')
+day_name = _localized_name('%A', 7)
+day_abbr = _localized_name('%a', 7)
 
 # Full and abbreviated names of months (1-based arrays!!!)
-month_name = _localized_name('%B')
-month_abbr = _localized_name('%b')
+month_name = _localized_name('%B', 13)
+month_abbr = _localized_name('%b', 13)
 
 # Constants for weekdays
 (MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY, SUNDAY) = range(7)