🌐 Mailman 3 September 2010 - Python-list - python.org

strange results from sys.version
by John Machin Sept. 27, 2010

Sept. 27, 2010

I am trying to help a user of my xlrd package who says he is getting anomalous results on his "work computer" but not on his "home computer". Attempts to reproduce his alleged problem in a verifiable manner on his "work computer" have failed, so far ... the only meaning difference in script output is in sys.version User (work): sys.version: 2.7 (r27:82500, Aug 23 2010, 17:18:21) etc Me : sys.version: 2.7 (r27:82525, Jul 4 2010, 09:01:59) etc I have just now downloaded the Windows x86 msi from www.python.org and reinstalled it on another computer. It gives the same result as on my primary computer (above). User result looks whacked: lower patch number, later date. www.python.org says "Python 2.7 was released on July 3rd, 2010." Is it possible that the "work computer" is using an unofficial release? What other possibilities are there? Thanks in advance ...

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Nautilus Python
by Eduardo Ribeiro Sept. 27, 2010

Sept. 27, 2010

I'm a python noob and wrote the following code for a nautilus extension: #!/usr/local/bin/python # -*- coding: utf-8 -*- import urllib import gtk import pygtk import nautilus import gconf import gtk.glade class Slide (nautilus.MenuProvider): f = None def __init__(self): self.client = gconf.client_get_default() self.f = gtk.glade.XML( "papel.glade" ) self.window = self.f.get_widget("window1") gtk.main() def oi (self): self.window.show() def menu_activate_cb(self, menu, file): self.oi() def get_file_items(self, window,files): if len(files) != 1: return item = nautilus.MenuItem('NautilusPython::slide_file_item','Slide','Slide') item.connect('activate', self.menu_activate_cb, files[0]) return item, def get_background_items(self, window, file): item = nautilus.MenuItem('NautilusPython::slide_item','Slide','Slide') item.connect('activate', self.menu_background_activate_cb, file) return item, def menu_background_activate_cb(self, menu, file): self.oi() But it doesn't work. If I comment the lines: self.f = gtk.glade.XML( "papel.glade" ) self.window = self.f.get_widget("window1") gtk.main() the code works but I can't see any problem in those lines. Any help?

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Re: program organization question for web development with python
by Hans Sept. 27, 2010

Sept. 27, 2010

On Sep 15, 5:33 pm, James Mills <prolo...(a)shortcircuit.net.au> wrote: > On Thu, Sep 16, 2010 at 10:14 AM, Hans <hans...(a)gmail.com> wrote: > > I'm new to this area. Please allow me to ask some (maybe stupid) > > questions. > > Without reading the rest of your post too much. Designs are up to you, > I can't comment. > > I can only share in a fairly common view, and that is, we'd encourage > you to use a web framework > as opposed to plain old CGI. > > cheers > james > > -- > -- James Mills > -- > -- "Problems are solved by method" Hi James, Thanks for response. Maybe I did not make my question clear. I never tried python web programing before, so I want to start from CGI. I read something about web framework like django, but seems it's a little bit complicated. my task is actually very simple: get search string from input, and then search database, print search result. I thought CGI should be good enough to do this. I don't have any idea about how to organize those cgi codes, so what I'm asking is: 1. do I have to have each single file for each hyper-link? Can I put them together? how? 2. how can I pass a db_cursor to another file? can I use db_cursor as a parameter? Thanks again! Hans

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Re: Raw Sockets - IP-Encapsulation
by Nobody Sept. 27, 2010

Sept. 27, 2010

On Thu, 23 Sep 2010 21:41:19 +0200, Matthias Guentert wrote: > I would like to create an IP tunnel using the IP protocol type 4 > (socket.IPPROTO_IPIP) on a Linux host. (I also would be happy if I > could create a GRE tunnel) > > The thing is, I just don't understand how I such a socket could be > created and then later on handled. You don't create sockets for IPPROTO_IPIP or IPPROTO_GRE. Outside of the kernel, those identifiers are only likely to be used for specifying protocols when e.g. configuring packet filtering. Tunnelling only involves user-space for configuration. Once a tunnel has been configured, it's just a networking interface, and any traffic is handled by the kernel. Tunnel interfaces are manipulated using the ioctl()s in linux/if_tunnel.h. Refer to the iproute2 source code for clues. If for some reason you wanted perform the encapsulation or decapsulation yourself, you would need to create a packet socket.

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Re: Errors with PyPdf
by flebber Sept. 27, 2010

Sept. 27, 2010

On Sep 27, 2:46 pm, Dave Angel <da...(a)ieee.org> wrote: > On 2:59 PM, flebber wrote: > > > <snip> > > Traceback (most recent call last): > > File "C:/Python26/Pdfread", line 16, in<module> > > open('x.txt', 'w').write(content) > > NameError: name 'content' is not defined > > When i use. > > > import pyPdf > > > def getPDFContent(path): > > content =C:\Components-of-Dot-NET.txt" > > # Load PDF into pyPDF > > pdf =yPdf.PdfFileReader(file(path, "rb")) > > # Iterate pages > > for i in range(0, pdf.getNumPages()): > > # Extract text from page and add to content > > content +=df.getPage(i).extractText() + "\n" > > # Collapse whitespace > > content = ".join(content.replace(u"\xa0", " ").strip().split()) > > return content > > > print getPDFContent(r"C:\Components-of-Dot-NET.pdf").encode("ascii", > > "ignore") > > open('x.txt', 'w').write(content) > > There's no global variable content, that was local to the function. So > it's lost when the function exits. it does return the value, but you > give it to print, and don't save it anywhere. > > data = getPDFContent(r"C:\Components-of-Dot-NET.pdf").encode("ascii", > "ignore") > > outfile = open('x.txt', 'w') > outfile.write(data) > > close(outfile) > > I used a different name to emphasize that this is *not* the same > variable as content inside the function. In this case, it happens to > have the same value. And if you used the same name, you could be > confused about which is which. > > DaveA Thank You everyone.

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possible circular import problem with python-3, but not python-2
by Darren Dale Sept. 27, 2010

Sept. 27, 2010

I am attempting to contribute to the h5py project by porting the code for python-3. The code is available in a branch at github: http://github.com/darrendale/h5py/tree/py3k . That code uses cython to wrap the hdf5 library. So far, only a few minor changes have been needed (relative imports, changes concerning strings/bytes), and I have been able to generate the c sources, build and install h5py for py3k. But I can't actually import the library. On Snow Leopard, using the python-3 installed via MacPorts: >>> import h5py Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/Users/darren/.local/lib/python3.1/site-packages/ h5py-1.3.1.dev-py3.1-macosx-10.6-x86_64.egg/h5py/__init__.py", line 34, in <module> from . import h5, h5a, h5d, h5f, h5fd, h5g, h5l, h5o, h5i, h5p, h5r, h5s, h5t, h5z File "h5t.pxd", line 17, in init h5py.h5a (h5py/h5a.c:5248) File "h5p.pxd", line 23, in init h5py.h5t (h5py/h5t.c:16481) File "h5t.pxd", line 17, in init h5py.h5p (h5py/h5p.c:9297) ImportError: No module named h5t That looks like it might be a circular import problem, but it works fine with python-2.6. I'm at a loss on how to proceed, could anyone please offer a suggestion? Thanks, Darren

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Re: Too much code - slicing
by Steven D'Aprano Sept. 27, 2010

Sept. 27, 2010

On Tue, 21 Sep 2010 16:17:48 +0200, Antoon Pardon wrote: > On Tue, Sep 21, 2010 at 12:07:07AM +0000, Steven D'Aprano wrote: >> On Mon, 20 Sep 2010 19:28:49 +0200, Antoon Pardon wrote: >> >> > Not necessarily. Some of us have the impression that Guido >> > deliberatly chose an ugly format for the ternary operator. >> >> If he did, then he must have changed his mind, because there is nothing >> ugly about the ternary operator we ended up with. > > That is a question of taste Yes, it certainly is. Describing it as "an ugly format" is also a matter of taste -- taste which in my opinion simply isn't justified by anything other than familiarity. > and the poll and discussion earlier made it > clear that this was not the preferred way to have a ternary operator. "Not preferred" != "ugly" > This form only ranked fourth (or maybe third), with the first three all > wanting ar structure with the elelement is this order: condition, true > case, false case > >> > Guido has alwasys been >> > against a ternary operator but the requests kept coming. So >> > eventually he introduced one. But the impression is that he chose an >> > ugly format in the hope of discouraging people to use it. >> >> That's sheer and unadulterated nonsense. The fact is that Guido changed >> his mind about ternary if after discovering that the work-around >> >> true-clause and condition or false-clause >> >> is buggy -- it gives the wrong answer if true-clause happens to be a >> false value like [], 0 or None. If I recall correctly, the bug bit >> Guido himself. > > Nonsense. That the work around was buggy was known years before the > ternary operator was finally introduced. But people kept forgetting it, and it bit the right person one time too many. > The introduction of list > comprehension made a ternary operator that more usefull but every time > it came up the supporters of Guido, told us we just had to define a > function if we wanted the items to depend on a condition. A function can't do the job, because it isn't lazy: def ifte(condition, x, y): if condition: return x else: return y n = 0 ifte(n != 0, 100/n, -1) will fail. This was perhaps *the* killer argument for a ternary-if operator. [...] > It seems that what changed is your memory and not the collective mind of > the python community. Fair call. -- Steven

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Plone Conference 2010 schedule published
by Matt Hamilton Sept. 27, 2010

Sept. 27, 2010

Over 400 attendees are set to meet at the 8th annual Plone Conference for a week-long programme of training, talks and developer sprints from the 25th to 31st October at the Thistle Grand Hotel in Bristol, UK. Plone Conference 2010 registrations are open. Plone, an Open Source Content Management System used throughout the world has a massive following and Plone events are held around the globe. The largest of these is the annual Plone Conference and this year will be held in the UK. Plone is used for developing websites, intranet and portals for corporations, NGOs and the public sector. Organised by Netsight Internet Solutions, it promises to bring together developers, designers, end users and business people. This year an additional event is being planned as a one-day mini-conference on the 26th October called "Plone in Business" which will be aimed specifically at analysts, advisors, evaluators and information professionals looking to find out more about Plone and see a showcase of successful Plone projects from across the sectors. It will also see the launch of the JBoye Plone Community of Practice. The main part of the conference, from the 27th - 29th October, has over 50 scheduled talks from speakers from 19 countries and includes an 'unconference' day in which talks will be proposed by the attendees. Plone Conference 2010 scheduled talks include: * Easier and faster Plone theming with Deliverance * Design and Development with Dexterity * Enterprise Search in Plone with Solr * Boosting productivity with "Plone-driven Plone development" * Brasil.gov.br: Building a digital nation with Plone Alan Runyan, co-founder of Plone and president of Enfold Systems along with Alex Limi, fellow co-founder of Plone and now Firefox User Experience Lead at Mozilla will be delivering a keynote. There will also be a guest keynote by Richard Noble, OBE, project director of the Bloodhound SSC project attempting be build a car to pass the 1,000mph land speed mark. The conference falls at a great time, with the recent release of Plone 4, a product that raises the bar in the Content Management System market with a faster, more user-friendly and more refined version of the product. So far, registrations for the conference have come from over 30 countries around the world. To find out more about the conference and to register, visit http://ploneconf2010.org. -- Matt Hamilton matth(a)netsight.co.uk Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Design | Zope/Plone Development and Consulting | Co-location | Hosting

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