Path: csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!aioe.org!feeder.news-service.com!newsfeed.xs4all.nl!newsfeed5.news.xs4all.nl!xs4all!post.news.xs4all.nl!not-for-mail Return-Path: X-Original-To: python-list@python.org Delivered-To: python-list@mail.python.org X-Spam-Status: OK 0.001 X-Spam-Evidence: '*H*': 1.00; '*S*': 0.00; 'else:': 0.03; 'elif': 0.04; 'subject:search': 0.07; 'python': 0.08; 'kelly': 0.09; 'none:': 0.09; 'this:': 0.10; 'def': 0.12; 'wrote:': 0.14; 'from:addr:simplistix.co.uk': 0.16; 'from:name:chris withers': 0.16; 'message-id:@simplistix.co.uk': 0.16; 'received:89.151': 0.16; 'received:89.151.125': 0.16; 'received:89.151.125.140': 0.16; 'received:server1.simplistix.co.uk': 0.16; 'received:simplistix.co.uk': 0.16; 'result)': 0.16; 'cc:addr :python-list': 0.17; 'header:In-Reply-To:1': 0.21; 'cc:2**0': 0.22; 'trying': 0.23; "i'm": 0.27; 'raise': 0.28; 'cc:addr:python.org': 0.30; 'from:addr:chris': 0.30; 'wanting': 0.32; 'break': 0.33; 'chris': 0.34; 'header:User-Agent:1': 0.35; 'none': 0.37; 'something': 0.37; 'processing': 0.38; 'but': 0.38; 'subject:: ': 0.38; 'received:192': 0.38; 'received:192.168.1': 0.40; 'kind': 0.60; 'url:co': 0.62; 'received:89': 0.68; 'batch': 0.68; 'birds': 0.84 Date: Wed, 18 May 2011 06:27:15 +0100 From: Chris Withers User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.1; en-GB; rv:1.9.2.17) Gecko/20110414 Thunderbird/3.1.10 MIME-Version: 1.0 To: Ian Kelly Subject: Re: in search of graceful co-routines References: <4DD2AA99.3010508@simplistix.co.uk> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Python X-BeenThere: python-list@python.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: General discussion list for the Python programming language List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Newsgroups: comp.lang.python Message-ID: Lines: 28 NNTP-Posting-Host: 82.94.164.166 X-Trace: 1305696432 news.xs4all.nl 49177 [::ffff:82.94.164.166]:48082 X-Complaints-To: abuse@xs4all.nl Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:5652 On 17/05/2011 18:26, Ian Kelly wrote: > You can use send the way you're wanting to. It will look something like this: > > def provider(): > result = None > while True: > if result is None: > if has_more_items(): > next_item = get_next_item() > else: > break > elif result == 'fail': > process_fail() > next_item = None > elif result == 'succeed': > process_succeed() > next_item = None > else: > raise ValueError('unknown result %s' % result) > result = (yield next_item) Yes, but it's this kind of birds nest I'm trying to avoid... Chris -- Simplistix - Content Management, Batch Processing & Python Consulting - http://www.simplistix.co.uk