...oh and here is the class I made for it.
class xslice(object):
'''
xslice(seq, start, stop, step) -> generator slice
'''
def __init__(self, seq, *stop):
if len(stop) > 3:
raise TypeError("xslice takes at most 4 arguments")
elif len(stop) < 0:
raise TypeError("xslice requires atleast 2 arguments")
else:
start, stop, step = (((0,) + stop[:2])[-2:] + # start, stop
(stop[2:] + (1,))[:1]) # step
stop = min(stop, len(seq))
self._ind = iter(xrange(start, stop, step))
self._seq = seq
def __iter__(self):
return self
def next(self):
return self._seq[self._ind.next()]
Although now that I think about it, it probably should've just been a simple
generator function.
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