[Checkins] SVN: DateTime/trunk/ Avoid storing `_aday`, `_fday`, `_pday`, `_amon`, `_fmon` and `_pmon` in memory for every instance but look them up dynamically based on `_dayoffset` and `_month`. This saves another 150 bytes of memory per DateTime instance.

[Hanno Schlichting]

Log message for revision 121590:
  Avoid storing `_aday`, `_fday`, `_pday`, `_amon`, `_fmon` and `_pmon` in memory for every instance but look them up dynamically based on `_dayoffset` and `_month`. This saves another 150 bytes of memory per DateTime instance.
  

Changed:
  U   DateTime/trunk/CHANGES.txt
  U   DateTime/trunk/src/DateTime/DateTime.py

-=-
Modified: DateTime/trunk/CHANGES.txt
===================================================================
--- DateTime/trunk/CHANGES.txt	2011-05-08 12:25:42 UTC (rev 121589)
+++ DateTime/trunk/CHANGES.txt	2011-05-08 12:32:20 UTC (rev 121590)
@@ -4,7 +4,9 @@
 3.0 (unreleased)
 ----------------
 
-- Avoid storing `_aday`, `_fday` and `_pday` in memory.
+- Avoid storing `_aday`, `_fday`, `_pday`, `_amon`, `_fmon` and `_pmon` in
+  memory for every instance but look them up dynamically based on `_dayoffset`
+  and `_month`. This saves another 150 bytes of memory per DateTime instance.
 
 - Moved various internal parsing related class variables to module constants.
 

Modified: DateTime/trunk/src/DateTime/DateTime.py
===================================================================
--- DateTime/trunk/src/DateTime/DateTime.py	2011-05-08 12:25:42 UTC (rev 121589)
+++ DateTime/trunk/src/DateTime/DateTime.py	2011-05-08 12:32:20 UTC (rev 121590)
@@ -417,9 +417,6 @@
         '_pm',
         '_pmhour',
         '_dayoffset',
-        '_fmon',
-        '_amon',
-        '_pmon',
         '_year',
         '_month',
         '_day',
@@ -835,8 +832,6 @@
             self._pmhour=hr or 12
             self._pm= (hr==12) and 'pm' or 'am'
         self._dayoffset = int((_julianday(yr,mo,dy) + 2L) % 7)
-        self._fmon, self._amon, self._pmon = \
-            _MONTHS[mo], _MONTHS_A[mo], _MONTHS_P[mo]
         # Round to nearest microsecond in platform-independent way.  You
         # cannot rely on C sprintf (Python '%') formatting to round
         # consistently; doing it ourselves ensures that all but truly
@@ -1355,10 +1350,18 @@
         """Return the month of the object as an integer."""
         return self._month
 
+    @property
+    def _fmon(self):
+        return _MONTHS[self._month]
+
     def Month(self):
         """Return the full month name."""
         return self._fmon
 
+    @property
+    def _amon(self):
+        return _MONTHS_A[self._month]
+
     def aMonth(self):
         """Return the abreviated month name."""
         return self._amon
@@ -1367,6 +1370,10 @@
         """Compatibility: see aMonth."""
         return self._amon
 
+    @property
+    def _pmon(self):
+        return _MONTHS_P[self._month]
+
     def pMonth(self):
         """Return the abreviated (with period) month name."""
         return self._pmon