On Thu, Oct 6, 2016 at 9:57 AM, Chris Angelico <ros...@gmail.com> wrote: > On Thu, Oct 6, 2016 at 11:09 PM, Frank Millman <fr...@chagford.com> wrote: >> Hi all >> >> I have used itertools.groupby before, and I love it. I used it to process a >> csv file and 'break' on change of a particular field. It worked very well. >> >> Now I want to use it to process a database table. I can select the rows in >> the desired sequence with no problem. However, I am using asyncio, so I am >> reading the rows asynchronously. >> >> Before I spend hours trying to figure it out, can anyone confirm if this is >> doable at all, or is groupby not designed for this. > > Most of itertools is going to assume synchronous iterables. However, > the docs give pure-Python equivalents for quite a few: > > https://docs.python.org/3/library/itertools.html#itertools.groupby > > You may be able to tweak that into an actual "itertools.agroupby" or > "aitertools.groupby".
There is already a third-party "aitertools" library, so there should be no need to write one from scratch. https://pypi.python.org/pypi/aitertools/0.1.0 -- https://mail.python.org/mailman/listinfo/python-list
