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

Re: Python dynamic attribute creation
by aahz＠pythoncraft.com June 28, 2010

June 28, 2010

In article <mailman.2300.1277754755.32709.python-list(a)python.org>, Michael Torrie <torriem(a)gmail.com> wrote: >On 06/27/2010 11:58 PM, Stephen Hansen wrote: >> >> To say you can't really know "much about" OOP without knowing "much >> about" Smalltalk seems basically, well, wrong. > >True. But you can't really criticize a language's implementation of OOP >without a good understanding of the "pure" OO language. For example, in >Smalltalk If/Then statements are actually methods of Boolean objects. >>From a certain point of view that's extremely appealing (consistent, >anyway). Almost functional in nature. They are not implemented this >way in Python, so that's one thing you could argue is not OO about Python. Python is in no way a pure OOP language. (I assume you're aware of this, but your phrasing leaves that in doubt.) -- Aahz (aahz(a)pythoncraft.com) <*> http://www.pythoncraft.com/ "If you don't know what your program is supposed to do, you'd better not start writing it." --Dijkstra

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C++/Python function call
by Zohair M. Abu Shaban June 28, 2010

June 28, 2010

Hello every one: I have this python function defined as: def set_time_at_next_pps(self, *args, **kwargs): """set_time_at_next_pps(self, usrp2::time_spec_t time_spec) -> bool""" it was generated to do the same function as the c++: set_time_at_next_pps(usrp2::time_spec_t(0, 0)) I am new to python and don't know hoe to use this python syntax. Any hint or help please? Cheers Zoh _________________________________________________________________ http://clk.atdmt.com/UKM/go/197222280/direct/01/ Do you have a story that started on Hotmail? Tell us now

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Re: I strongly dislike Python 3
by Grant Edwards June 28, 2010

June 28, 2010

On 2010-06-28, Stefan Behnel <stefan_ml(a)behnel.de> wrote: > Edward A. Falk, 28.06.2010 16:15: >> In article<mailman.2146.1277570052.32709.python-list(a)python.org>, >> Thomas Jollans wrote: >> >>> There is no reason for print not being a function. Also, do you use >>> print *that* much? Really? >> >> I use it all the time. Who doesn't? What do you use instead? > > Usually file.write() or log.info() and friends. Since you can't really > control the encoding used by print(), nor redirect it locally, it's mostly > useless for anything but debugging and small scripts. Maybe it's just me, but I find both debugging and small scripts to be very useful. -- Grant Edwards grant.b.edwards Yow! I need to discuss at BUY-BACK PROVISIONS gmail.com with at least six studio SLEAZEBALLS!!

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Python as a scripting language. Alternative to bash script?
by Dave Pawson June 28, 2010

June 28, 2010

I've a fairly long bash script and I'm wondering how easy it would be to port to Python. Main queries are: Ease of calling out to bash to use something like imageMagick or Java? Ease of grabbing return parameters? E.g. convert can return both height and width of an image. Can this be returned to the Python program? Can Python access the exit status of a program? I'd prefer the advantages of using Python, just wondering if I got so far with the port then found it wouldn't do something? Has anyone made this comparison please? TIA -- Dave Pawson XSLT XSL-FO FAQ. Docbook FAQ. http://www.dpawson.co.uk

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N00b question: matching stuff with variables.
by Ken D'Ambrosio June 28, 2010

June 28, 2010

Hi, all. I've got a file which, in turn, contains a couple thousand filenames. I'm writing a web front-end, and I want to return all the filenames that match a user-input value. In Perl, this would be something like, if (/$value/){print "$_ matches\n";} But trying to put a variable into regex in Python is challenging me -- and, indeed, I've seen a bit of scorn cast upon those who would do so in my Google searches ("You come from Perl, don't you?"). Here's what I've got (in ugly, prototype-type code): file=open('/tmp/event_logs_listing.txt' 'r') # List of filenames seek = form["serial"].value # Value from web form for line in file: match = re.search((seek)",(.*),(.*)", line) # Stuck here Clearly, the line, above, is just plain ol' wrong, but I'm including it to give a hint of what I'm trying to do. What's the correct Python-esque way to go about this? Thanks! -Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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PDF Generation With Reportlab
by Albert Leibbrandt June 28, 2010

June 28, 2010

Hi All I am hoping there is someone out there that knows reportlab quite well. I posted this on the reportlab mailing list but there is not much activity on that list I am currently generating a pdf report using reportlab 2.3 and python 2.5.4. The report has a table that spans multiple pages. My problem is that the portions on the table that continues after the first page, is starting at a point not defined by me, so it creates a layer over the logo which is on each page. How do I specify the starting point of each page the table spans ? Normally I would use pagebreak and spacers but I cannot figure out how to fit this into the table structure. I also looked at using the myLaterPages function, but it does not seem that I can do this with the canvas. Here is a small extract of my current code doc = SimpleDocTemplate("test.pdf") Story = [Spacer(1, mm * 60)] #populate story with first page record_data = [] for var1, var2, var3, var4, var5 in cursor.fetchall(): Story.append(PageBreak()) Story.append(Spacer(1, mm * 15)) Story.append(Paragraph(var1, heading1)) Story.append(Spacer(1, mm * 5)) Story.append(Paragraph(var2, description)) Story.append(Spacer(1, mm * 5)) record_data.append([Paragraph('Header 1', grid_header), Paragraph('Header 2', grid_header), Paragraph('Header 3', grid_header), Paragraph('Header 4', grid_header), Paragraph('Header 5', grid_header)]) record_data.append([Paragraph(var1, grid), Paragraph(var2, grid), Paragraph(var3, grid), Paragraph(var4, grid), Paragraph(var5, grid)]) t = Table(record_data, style=[('GRID', (0, 0), (-1, - 1), 0.5, colors.HexColor('#00204E'))], colWidths=[65, 220, 50, 50, 40]) Story.append(t) doc.build(Story, onFirstPage=myFirstPage, onLaterPages=myLaterPages) myFirstPage and MyLaterPages are functions that use the canvas to draw the page header and footer. Any advice would be greatly appreciated. Cheers Albert

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Re: I strongly dislike Python 3
by Grant Edwards June 28, 2010

June 28, 2010

On 2010-06-27, Benjamin Kaplan <benjamin.kaplan(a)case.edu> wrote: >> It should be easier to have a large number of python versions on one >> machine... ?I am realy fond of 2.5 so I am probily going to start >> compiling them or just include the python2.5 exe if I port stuff and >> settle it that way.. > > You're on the only platform where it isn't that easy. All us *nix > users have to do is compile it with the altinstall flag, and then use > #!/usr/bin/env python25 > Windows uses the file extension instead of the shebang line to execute > stuff, so it's harder for you to have multiple versions. If you install a real shell on Windows, then the hash-bang line works fine. :) -- Grant

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Python 2.6.x version module compatibility
by Ratufa June 28, 2010

June 28, 2010

Suppose I have a webapp running in a virtualenv (--no-site-packages) cloned off a Python 2.6.2 install, running under mod_wsgi. The virtual environment has various modules installed in it, some perhaps using C extensions. Question: If the Python installation gets upgraded to 2.6.5 (or 2.6.7 at some future point), and assuming mod_wsgi also gets compiled/installed against the new version, will the virtual environments have to be rebuilt and the modules re-installed? Or, are Python installations w/in the 2.6.x series backwards compatible enough that, in the general case, the webapp will continue to work "as is"? This is under Linux, if it makes a difference.

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Re: GDAL-1.7.1 : vcvarsall.bat missing
by kBob June 28, 2010

June 28, 2010

On Jun 25, 9:51 am, Max Erickson <maxerick...(a)gmail.com> wrote: > kBob <krd...(a)gmail.com> wrote: > > On Jun 25, 1:26 am, Mark Lawrence <breamore...(a)yahoo.co.uk> > > wrote: > >> On 24/06/2010 21:48, Christian Heimes wrote: > > >> >> I am attempting to install the GDAL bindings (GDAL-1.7.1) > >> >> on a Windows XP Desktop with Python 2.6 and GDAL. During > >> >> install, the > > If it suits your needs, you can wire the OSGEO installation of GDAL > to a python.org python installation (rather than a bundled OSGEO > python interpreter, which is another option): > > http://trac.osgeo.org/osgeo4w/ > > Setting the correct paths was enough to get the basic things I used > to work (but I haven't used it extensively). > > > > > Thanks for the tips, gentlemen. > > > I'll try my luck with Cygwin's ggc before I look into another > > C/C++ > > compiler. > > > Kelly Dean > > Fort Collins, CO > > Giovanni Bajo packages a version of MinGW GCC for use with Python: > > http://www.develer.com/oss/GccWinBinaries > > He does note on the page that the MinGW project isn't quite so sure > that GCC 4.x is ready for release. > > Max Thanks again for the tips. Your suggestions are very helpful. I was able to get the FWTools installed on the Windows Desktop. It worked out very well. No issues with the GDAL included in this set of binaries. However, I am intrigued with the OSGeo Project, especially with the Qt binaries included. After understanding GDAL, I'll have to build some GUI applications to display the GeoTIFF, MrSID, and JPG2000. I was planning to use Tkinter, but with Qt available from OSgeo4W, it will give me an opportunity to explorer the GUI development offer by this package. Kelly Dean Fort Collins, CO

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Re: I strongly dislike Python 3
by falk＠green.rahul.net June 28, 2010

June 28, 2010

In article <mailman.2146.1277570052.32709.python-list(a)python.org>, Thomas Jollans <thomas(a)jollans.com> wrote: >There is no reason for print not being a function. Also, do you use >print *that* much? Really? I use it all the time. Who doesn't? What do you use instead? -- -Ed Falk, falk(a)despams.r.us.com http://thespamdiaries.blogspot.com/

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