You can execute blocking call at any time of your pleasing. It will predictable block all execution paths. Typical wrapper around blocking calls is thread. Something like this (from http://twistedmatrix.com/documents/current/core/howto/threading.html):

d = threads.deferToThread(yourSyncCall)
d.addCallback(...)

--
Konrads Smelkovs
Applied IT sorcery.


On Thu, Apr 22, 2010 at 9:06 AM, Andrey Fedorov <anfedorov@gmail.com> wrote:
Thanks! The main reason for the question, though, is just curiosity from playing with and learning the Twisted API, not necessarily getting the example working :)

A more direct question would have been - is there a Twisted reactor which provides a blocking call instead of a callback? Is there an accepted "best" way of wrapping an non-blocking async API with callbacks into a blocking synchronous one?

- Andrey


On Thu, Apr 22, 2010 at 12:40 AM, Alexandre Quessy <alexandre@quessy.net> wrote:
Hello Andrey,
May I recommend you to look at Twisted Words? There are plenty of IRC
tools there.

Regards,
Alex


2010/4/21 Andrey Fedorov <anfedorov@gmail.com>:
> I'm trying to write a dead-simple interface for an IRC client library, like
> so:
>     import simpleirc
>     connection = simpleirc.Connect('irc.freenode.net', 6667)
>     channel = connection.join('foo')
>     find_command = re.compile(r'google ([a-z]+)').findall
>     for msg in channel:
>         for t in find_command(msg):
>             channel.say("http://google.com/search?q=%s" % t)
> Working from the example in the docs, I'm running into trouble with the
> callbacks (the code is a bit lengthy, so I pasted it here). The problem is
> that the call to channel.__next__ needs to be returned when the
> callback <IRCClient instance>.privmsg is called, there doesn't seem to be a
> clean option of doing that. I could try to use exceptions or threads, but
> that seems like the wrong thing here, is there a simpler (blocking?) way of
> using a twisted reactor that would make this possible?
> Cheers,
> Andrey
>
> On Wed, Apr 21, 2010 at 10:00 PM, César García <celord@gmail.com> wrote:
>>
>> +1 Yes, it's great!!
>>
>> 2010/4/21 Kevin Horn <kevin.horn@gmail.com>
>>>
>>> This blog series is also totally rock-a-licious.
>>>
>>> http://krondo.com/blog/?page_id=1327
>>
>>
>> --
>> http://celord.blogspot.com/
>>
>> _______________________________________________
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>> Twisted-Python@twistedmatrix.com
>> http://twistedmatrix.com/cgi-bin/mailman/listinfo/twisted-python
>>
>
>
> _______________________________________________
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>
>



--
Alexandre Quessy
http://alexandre.quessy.net/

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