[Zope-Checkins] CVS: Zope3/lib/python/Zope/ZTUtils - Iterator.py:1.1.2.1
Fred Drake Jr
fdrake@acm.org
Tue, 20 Nov 2001 13:00:59 -0500
Update of /cvs-repository/Zope3/lib/python/Zope/ZTUtils
In directory cvs.zope.org:/tmp/cvs-serv2605/ZTUtils
Added Files:
Tag: Zope-3x-branch
Iterator.py
Log Message:
Add the basic Iterator module to ZTUtils for Zope 3.
=== Added File Zope3/lib/python/Zope/ZTUtils/Iterator.py ===
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__doc__='''Iterator class
$Id: Iterator.py,v 1.1.2.1 2001/11/20 18:00:59 fdrake Exp $'''
__version__='$Revision: 1.1.2.1 $'[11:-2]
import string
class Iterator:
'''Simple Iterator class'''
__allow_access_to_unprotected_subobjects__ = 1
def __init__(self, seq):
self.seq = seq
self.nextIndex = 0
def next(self):
i = self.nextIndex
try:
self.seq[i]
except IndexError:
return 0
self.index = i
self.nextIndex = i+1
return 1
def number(self): return self.nextIndex
def even(self): return not self.index % 2
def odd(self): return self.index % 2
def letter(self, base=ord('a'), radix=26):
index = self.index
s = ''
while 1:
index, off = divmod(index, radix)
s = chr(base + off) + s
if not index: return s
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):
try: self.seq[self.nextIndex]
except IndexError: return 1
return 0
def item(self):
return self.seq[self.index]
def length(self):
return len(self.seq)