[Digicool-CVS] CVS: Packages/ZTUtils - Iterator.py:1.2

[Evan Simpson]

Update of /cvs-repository/Packages/ZTUtils
In directory cvs.zope.org:/tmp/cvs-serv7171

Modified Files:
	Iterator.py 
Log Message:
Add Roman numeral conversion to Iterators based on Tino's algorithm.


=== Packages/ZTUtils/Iterator.py 1.1 => 1.2 ===
 __version__='$Revision$'[11:-2]
 
+import string
+
 class Iterator:
     '''Simple Iterator class'''
 
@@ -123,6 +125,20 @@
     def Letter(self):
         return self.letter(base=ord('A'))
 
+    def Roman(self, rnvalues=(
+                    (1000,'M'),(900,'CM'),(500,'D'),(400,'CD'),
+                    (100,'C'),(90,'XC'),(50,'L'),(40,'XL'),
+                    (10,'X'),(9,'IX'),(5,'V'),(4,'IV'),(1,'I')) ):
+        n = self.index + 1
+        s = ''
+        for v, r in rnvalues:
+            rct, n = divmod(n, v)
+            s = s + r * rct
+        return s
+
+    def roman(self, lower=string.lower):
+        return lower(self.Roman())
+
     def start(self): return self.nextIndex == 1
 
     def end(self):
@@ -135,3 +151,4 @@
 
     def length(self):
         return len(self.seq)
+