| [Time] Name | Message |
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[02:21] bitcycle
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Hey all. Could someone comment on what I'm doing wrong on this? http://paste.pound-python.org/show/12860/ I'm trying to use zeromq + python bindings (pyzmq) to implement a pub/sub abstraction. I'm getting a "Segmentation fault"...
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[07:57] bitcycle
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Hey all. I'm wondering if someone could help me out with a pub/sub issue. I run my script with the pub and sub in different child processes. When the processes end, the sockets are closed... but it leaves the file descriptors around. I've searched online for a bit, but haven't found a way to get it stop leaving them around.
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[10:58] mikko
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good day all
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[10:59] samsoir
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morning
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[11:00] mikko
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have you moved?
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[11:01] samsoir
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not yet
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[11:01] samsoir
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28th November
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[11:01] mikko
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is there going to be a party?
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[11:01] samsoir
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yes
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[11:01] samsoir
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29th October
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[11:01] mikko
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you should hire meat wagon to that party
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[11:01] mikko
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do they do that?
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[11:01] samsoir
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heh, we're going one beter
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[11:01] samsoir
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better*
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[11:01] samsoir
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making two fire pits in the garden, and pit roasting some wildlife
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[11:01] mikko
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foie gras wagon?
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[11:02] mikko
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http://en.wikipedia.org/wiki/Rosvopaisti
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[11:02] mikko
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you can do this
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[11:02] samsoir
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that sounds awesome
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[11:03] mikko
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it's also fair bit of work to get going
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[11:03] mikko
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but so good
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[11:04] samsoir
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we're purchasing a pig and goat for the day
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[11:06] mikko
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interesting
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[11:07] mikko
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you coming tomorrow?
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[11:07] mikko
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http://pubsubhuddle.com/
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[11:12] samsoir
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I am
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[11:13] samsoir
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right, gtg - see you tomorrow mikko
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[14:02] someone-noone
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hello! Why zmq_recv (socket,ZMQ_NONBLOCK) returns 0 even no clients are connected? Here is what i'm talking about: http://pastebin.com/za25WB8r
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[14:02] someone-noone
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this code prints "@" symbol, but noone connected
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[14:04] Steve-o
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on the latest versions?
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[14:04] someone-noone
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2.1.10
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[14:07] Steve-o
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same with the C api?
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[14:08] someone-noone
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i looked at api here http://api.zeromq.org/2-1:zmq-recv
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[14:08] someone-noone
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here is told that zmq_recv should return 0 if successful and -1 otherwise
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[14:08] Steve-o
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yup, I'm just reviewing the docs
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[14:09] Steve-o
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I haven't looked at the C++ API for a while though
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[14:09] someone-noone
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but i'm using c api...
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[14:09] Steve-o
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socket.recv is c++
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[14:10] someone-noone
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oh my god
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[14:10] Steve-o
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otherwise I expect to see zmq_recv
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[14:10] someone-noone
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you're right
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[14:10] Steve-o
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:P
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[14:10] someone-noone
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i was thinking i'm using c api :D
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[14:11] someone-noone
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so, my problem solved by changing if (socket.recv (&request,ZMQ_NOBLOCK) == 0) to if (socket.recv (&request,ZMQ_NOBLOCK) == true)
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[14:12] Steve-o
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so it is binding specific,
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[14:12] Steve-o
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always easy to get mixed up
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[14:14] someone-noone
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yeah
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[14:14] someone-noone
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btw, thanks for help!
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[17:21] michelp
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morning!
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[17:46] pieterh
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michelp: hi
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[21:45] minrk1
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mikko: hi, I have some buildbot questions
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[21:50] Steve-o
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minrk1: anything interesting?
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[21:51] minrk1
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not really, just permissions - I used to be able to manually re-run builds, but can't anymore
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[21:52] minrk1
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and a recent pyzmq build failed with an error I can't reproduce (and identical code to the previous successful build)
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[21:52] Steve-o
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k
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[21:54] minrk1
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It would probably also make sense to have builds for libzmq-3.0 - not just 2.1,2.2 and 4.0.
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[21:55] Steve-o
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does pyzmq build on Windows?
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[21:55] minrk1
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sure
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[21:56] Steve-o
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I only see Linux builds on the bot, but I don't know how complicated the bindings are
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[21:57] minrk1
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should be 3 lines to build and run tests
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[21:58] Steve-o
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do different Python versions need to be targeted differently? 2.6, 2.7, 3?
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[21:58] minrk1
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in what way?
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[21:59] Steve-o
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as in does your binding work with all these versions with no changes?
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[21:59] minrk1
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the source does, not the compiled result
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[21:59] Steve-o
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out of interest, I only use Python in Scons
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[22:00] minrk1
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Cython generates a a set of .c extension files that will compile correctly on all Pythons >= 2.5
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[22:00] minrk1
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and the pure-Python part of the code is taken care to be valid on >= 2.5 as well
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[22:01] Steve-o
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So does Cython handle any incompatibilities from v3 then?
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[22:01] Steve-o
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Because are there not some big changes, hence 2.x is still default on many distros
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[22:01] minrk1
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yes, Cython takes care of all of that
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[22:02] minrk1
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(it's pretty awesome)
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[22:02] Steve-o
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nice
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[22:03] minrk1
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well, Cython takes care of *most* of it - I have to help a little bit when writing explicit C-API calls to the buffer interface, which keeps changing
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[22:04] minrk1
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It's relatively straightforward to write multiple-version support in C (more so than Python), because you can just use a big pile of #if directives
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[22:04] Steve-o
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sure, but it can become a headache soon enough
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[22:04] minrk1
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yes - it would be a huge pain to write it manually
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[22:05] minrk1
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but the C-code is all generated from Cython sources, which don't care about Python versions.
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[22:08] minrk1
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All this multiversion support is the reason the 58-line version.pyx results in a 1400 line version.c
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[22:14] Steve-o
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well line count in such cases is a tad misleading, but the increased size probably has a lot of legibility overhead for debugging
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[22:15] minrk1
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certainly - it's hugely verbose with tons of comments, to help map the C-code to your Cython source
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[22:15] minrk1
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but there's still 100s of lines of boilerplate for handling changes in the C-API
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[22:18] Steve-o
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PHP has been the most entertaining for boilerplate so far
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[22:19] minrk1
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pyzmq itself has some, in order to properly support libzmq 2.1, 3.0, and 4.0
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