Index: string.py
===================================================================
--- string.py	(revision 64569)
+++ string.py	(working copy)
@@ -121,6 +121,16 @@
     return s.split(sep, maxsplit)
 splitfields = split
 
+def rsplit(s,sep=None,maxsplit=-1):
+    """S.rsplit([sep [,maxsplit]]) -> list of strings
+    
+    Return a list of the words in the string S, using sep as the
+    delimiter string, starting at the end of the string and working
+    to the front.  If maxsplit is given, at most maxsplit splits are
+    done. If sep is not specified or is None, any whitespace string
+    is a separator."""
+    return s.rsplit(sep,maxsplit)
+rsplitfields=rsplit
 # Join fields with optional separator
 def join(words, sep = ' '):
     """join(list [,sep]) -> string