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Groups > comp.lang.python > #33125

Re: A gnarly little python loop

From Peter Otten <__peter__@web.de>
Subject Re: A gnarly little python loop
Date 2012-11-11 10:54 +0100
Organization None
References <k7nlmo$1v6$2@ger.gmane.org> <mailman.3555.1352623728.27098.python-list@python.org> <7x4nkwzesu.fsf@ruckus.brouhaha.com>
Newsgroups comp.lang.python
Message-ID <mailman.3557.1352627686.27098.python-list@python.org> (permalink)

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Paul Rubin wrote:

> Cameron Simpson <cs@zip.com.au> writes:
>> | I'd prefer the original code ten times over this inaccessible beast.
>> Me too.
> 
> Me, I like the itertools version better.  There's one chunk of data
> that goes through a succession of transforms each of which
> is very straightforward.

[Steve Howell]
>     def get_tweets(term, get_page):
>         page_nums = itertools.count(1)
>         pages = itertools.imap(api.getSearch, page_nums)
>         valid_pages = itertools.takewhile(bool, pages)
>         tweets = itertools.chain.from_iterable(valid_pages)
>         return tweets
 

But did you spot the bug(s)?
My itertools-based version would look like this

    def get_tweets(term):
        pages = (api.GetSearch(term, pageno)
                 for pageno in itertools.count(1))
        for page in itertools.takewhile(bool, pages):
            yield from page

but I can understand that it's not everybody's cup of tea.

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Thread

Re: A gnarly little python loop Cameron Simpson <cs@zip.com.au> - 2012-11-11 19:48 +1100
  Re: A gnarly little python loop Paul Rubin <no.email@nospam.invalid> - 2012-11-11 01:09 -0800
    Re: A gnarly little python loop Peter Otten <__peter__@web.de> - 2012-11-11 10:54 +0100
      Re: A gnarly little python loop Steve Howell <showell30@yahoo.com> - 2012-11-11 09:16 -0800
      Re: A gnarly little python loop Steve Howell <showell30@yahoo.com> - 2012-11-11 09:16 -0800
    Re: A gnarly little python loop Steve Howell <showell30@yahoo.com> - 2012-11-11 09:29 -0800
      Re: A gnarly little python loop Peter Otten <__peter__@web.de> - 2012-11-11 19:34 +0100
        Re: A gnarly little python loop Steve Howell <showell30@yahoo.com> - 2012-11-11 11:16 -0800
          Re: A gnarly little python loop Cameron Simpson <cs@zip.com.au> - 2012-11-12 11:43 +1100
            Re: A gnarly little python loop Steve Howell <showell30@yahoo.com> - 2012-11-11 17:38 -0800
        Re: A gnarly little python loop Roy Smith <roy@panix.com> - 2012-11-11 14:23 -0500

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