Mailman 3 October 2012 - python-uk

November London Python Code Dojo
by Tim Golden Oct. 26, 2012

Oct. 26, 2012

Well, the first day of the month is also the first Thursday of the month. And that means: London Python Code Dojo! Get your tickets here (and move fast, they're generally snapped up sharpish): https://ldnpydojo.eventwax.com/london-python-code-dojo-season-4-episode-3 This month there's a very slight difference, as the challenge will be preset, rather than voted on. (I'm not saying what it is because you'll all turn up with ready-made solutions which will make the evening rather short). If you need any more information, contact the team via Twitter: @ldnpydojo Look forward to seeing you all next Thursday. TJG

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Next CamPUG meeting: Tuesday 6th November 2012
by Tony Ibbs Oct. 22, 2012

Oct. 22, 2012

From the Cambridge and East Anglian Python Users Group google group: The next meeting will be Tuesday 6th November, 7.30pm at RealVNC (http://tinyurl.com/realvncoffices). We normally stop about 9.30pm, and go on to the pub. This will be a talks meeting. Jukka Lehtosalo has agreed to come and talk about mypy (http://www.mypy-lang.org/), "an experimental Python variant that aims to combine the benefits of dynamic (or "duck") typing and static typing". I heard him talk about it briefly at PyConUK, and I think this should be interesting. I also hope we'll have another speaker, on Python, unit-testing, and using Python to unit test C++ programs. I'll confirm that when I know for sure. If anyone else wants to give a talk (anything from five minutes and up is welcome), either volunteer on the group, or just turn up with something to say. Meetings after that should be: • Tuesday 4th December, a coding/doing stuff meeting • Tuesday 8th January (note, NOT the first Tuesday), another talks meeting • Tuesday 5th February, a coding/doing stuff meeting. Tibs

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Netsight, Bristol hiring Plone / Python / Pyramid developer(s)
by Matt Hamilton Oct. 15, 2012

Oct. 15, 2012

Hi All, We are hiring again! We are looking for one or two developers to come join us full time in our Bristol office. We are a 12-year old web development company of 13 people who mainly develop intranets and public websites on top of Plone and Pyramid. Full details are here: http://www.netsight.co.uk/blog/python-plone-developer-wanted-2012/ If you don't know Plone or Pyramid, but have some experience with Python and/or other web technologies and want to learn then we are certainly up for training people up. The right attitude and ability to transfer skills and concepts is more important to us than just raw absolute skills. -Matt -- Matt Hamilton, Technical Director Netsight Internet Solutions Limited http://www.netsight.co.uk/matth Tel: 0117 90 90 90 1 Ext. 15 Registered in England No. 3892180 Registered office: 40 Berkeley Square, Clifton, Bristol, BS8 1HU

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Next Python Sheffield meeting Oct 30th
by Daley Chetwynd Oct. 14, 2012

Oct. 14, 2012

Hi all, The next Python Sheffield meeting will be on Tuesday October 30th at the GIST Lab. The meeting will run from 19:00 - 20:45, although doors will be open at the GIST Lab from 18:45. The GIST Lab is located opposite Sheffield train station and behind the Showroom cinema: https://maps.google.com/maps?q=GIST+Lab,+Sheffield,+United+Kingdom&hl=en&sl… This month we have the following two speakers: Daley Chetwynd (@dchetwynd) - Experiences of PyCon UK 2012 Safe Hammad (@safehammad) - "The Natives are Revolting!" This, and other interesting sentences, deconstructed and analysed by Python's Natural Language Toolkit If you'd like to join us for this meeting then please register for free at: http://pythonsheffield1210.eventbrite.com/ The Python Sheffield group is open to all levels of Python user, including those who don't currently know the Python language, but would like to learn. We're always looking for future speakers, so if you'd like to talk on anything Python-related and fancy a trip over to Sheffield, please get in touch. To find out more, follow @pysheff on Twitter or see the Google group: http://groups.google.com/group/python-sheffield I've also written the following blog post on PyCon UK 2012: http://tellthemuserstories.wordpress.com/2012/10/14/pycon-uk-2012-conferenc… Thanks, Daley Chetwynd -- -- http://www.fastmail.fm - A fast, anti-spam email service.

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All Your Base Conference
by John Wards Oct. 10, 2012

Oct. 10, 2012

Hello Python people. I'm the organiser of All Your Base Conf, http://allyourbaseconf.com, a database conference aimed at developers. It's happening in Oxford on the 23rd of November. We have the creator of MySQL giving the keynote and have talks from Craig Kerstiens (Heroku), Brandon Keepers (Github), Lisa Phillips (Twitter), Brian LeRoux (Phonegap/Adobe) and more. The talks will be covering tech like MySQL, Postgres, Redis, Cassandra, MongoDB and techniques for dealing with data etc. I've created the discount code 'python' which gives £35 off the ticket making the tickets £90 + VAT. Feel free to share this discount code around! Cheers John

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Semaphore and threading
by Philip Herron Oct. 7, 2012

Oct. 7, 2012

Hey I am working on a little tool for myself recentl and had a bug that was bothering me for ages. Kinda of a basic producer consumer problem. The consumer was running in a thread: self.__semaInvoke = threading.Semaphore (1) self.__semaHandle = threading.Semaphore (0) def run (self): self.__running = True while (self.__running): print "waiting" self.__semaHandle.acquire () self.info ("Invoking %s" % self.__invoke) if self.__invoke == 'STOP': self.__running = False elif (self.__invoke in self.__steps) and \ hasattr (self, self.__invoke): self.__steps[self.__invoke] (self) self.__invoke = None else: self.info ("ERROR %s not valid command!" % \ self.__invoke) self.__running = False self.__invoke = None self.__semaInvoke.release () print "released" self.close () Then i have a method to invoke which is the producer: def invoke (self, cmd): if self.__running: self.__semaInvoke.acquire () print "setting..." self.__invoke = cmd self.__semaHandle.release () print "set + release!" So the invoke method isnt in a thread as such just called from the main thread since its embeded in a C program i call this method. But the __semaHandle.release was never being released properly and the consumer thread would hang untill i would invoke again. Then i simply added time.sleep (1) at the end of the invoke thread and everything worked perfectly. I reckon the ideal solution was to have the invoke running in a thread or something but tried to keep it all simple as i could. Just seemed to be some kind of race where the release would be called but not fully released if it just returned after that method. I bet it something to do with GIL in python where the request to release is in a que since the consumer is trying to read it or something at the same time.maybe a mutex might help but not sure. Just what i noticed anyway. I think if i had the producer in its own thread as well i think this would solve the problem. But the whole idea was to have my C program calling bla.invoke (). But this seems to not produce the results i wanted. Seems just time.sleep fixes everything just making sure things are set but its not a concrete solution wonder has anyone else seen this. --Phil

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London Py Dojo code submission
by Tom Viner Oct. 5, 2012

Oct. 5, 2012

Hi all, If you want to post your code up in all it's ever lasting glory, pop along to our github repo for last night: https://github.com/ldnpydojo/countdown-number-game See the README for instructions. Cheers, Tom

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Lightning talks at October London Python Code Dojo
by Greg Roodt Oct. 4, 2012

Oct. 4, 2012

Hi In the excitement around Pycon UK, I forgot to mention that we are looking for people to do some lightning talks at the October Dojo. Module of the month or any cool project / framework you know about or have created. Get in touch if you are interested. Cheers Greg @groodt

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