On Monday 05 September 2016 18:46, Antoon Pardon wrote:
> I need an interator that takes an already existing iterator and
> divides it into subiterators of items belonging together.
>
> For instance take the following class, wich would check whether
> the argument is greater or equal to the previous argument.
These sorts of filtering jobs are often so simple that its hardly worth
generalising them unless you have a whole lot of them.
def group_increasing(seq):
it = iter(seq)
accum = []
try:
last = next(it)
except StopIterator:
return
accum.append(last)
for item in it:
if item >= last:
accum.append(item)
else:
yield tuple(accum)
accum = [item]
last = item
if accum:
yield tuple(accum)
If you do need to generalise, using itertools.groupby is probably the right way
to do it.
--
Steve
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