Gábor Farkas wrote:
Scott David Daniels wrote:
If you have python 2.3 or 2.4, you have itertools.
for me it seems that 2.3 does not have itertools.groupby.
it has itertools, but not itertools.groupby.
True. The 2.4 document says that itertools.groupby() is equivalent to:
class groupby(object):
def __init__(self, iterable, key=None):
if key is None:
key = lambda x: x
self.keyfunc = key
self.it = iter(iterable)
self.tgtkey = self.currkey = self.currvalue = xrange(0)
def __iter__(self):
return self
def next(self):
while self.currkey == self.tgtkey:
self.currvalue = self.it.next() # Exit on StopIteration
self.currkey = self.keyfunc(self.currvalue)
self.tgtkey = self.currkey
return (self.currkey, self._grouper(self.tgtkey))
def _grouper(self, tgtkey):
while self.currkey == tgtkey:
yield self.currvalue
self.currvalue = self.it.next() # Exit on StopIteration
self.currkey = self.keyfunc(self.currvalue)
So you could always just use that code.
--Scott David Daniels
[EMAIL PROTECTED]
--
http://mail.python.org/mailman/listinfo/python-list
