[Python-checkins] python/nondist/peps pep-0343.txt,1.12,1.13

[gvanrossum@users.sourceforge.net]

Update of /cvsroot/python/python/nondist/peps
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv23233

Modified Files:
	pep-0343.txt 
Log Message:
Add a variant of the decimal example.


Index: pep-0343.txt
===================================================================
RCS file: /cvsroot/python/python/nondist/peps/pep-0343.txt,v
retrieving revision 1.12
retrieving revision 1.13
diff -u -d -r1.12 -r1.13
--- pep-0343.txt	17 May 2005 22:15:50 -0000	1.12
+++ pep-0343.txt	18 May 2005 02:53:26 -0000	1.13
@@ -416,6 +416,20 @@
                     s += num / fact * sign
                 return +s
 
+       An alternative version of the generator saves the entire
+       context instead of just the precision attribute.  This is more
+       robust, but also more expensive, making it perhaps the better
+       choice when several attributes are modified together:
+
+        @do_template
+        def with_extra_precision(places=2):
+            oldcontext = decimal.getcontext()
+            newcontext = oldcontext.copy()
+            newcontext.prec += places
+            decimal.setcontext(newcontext)
+            yield None
+            decimal.setcontext(oldcontext)
+
 References
 
     [1] http://blogs.msdn.com/oldnewthing/archive/2005/01/06/347666.aspx