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

subclass of object
by Jason Friedman April 2, 2010

April 2, 2010

Hi, what is the difference between: def MyClass(object): pass and def MyClass(): pass

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Re: pynotify for python 3.1.. Help Please..
by Jebagnana Das April 2, 2010

April 2, 2010

Thank you for your reply. Unfortunately pynotify is not available as a .py file but as an .so (shared library) file. In both python 2.5 and 2.6 installations it can be found at /var/lib/python-support/python2.x/gtk-2.0/pynotify/__init__.py , _pynotify.so. I think it was written in native c or c++ which is then converted to a shared library to use with python.. Unless the source code in c is available, we can't port it to python 3.. I can't find the authors name or any license agreement there.. By luck if any of the authors of pynotify here please answer me.. When will the .so for python3 will be released? or Is there any alternate way of achieving this?? Regards, Jeba. Xav : You can simply call me as jeba. Hi Jebamnana, > > You'll probably have to copy the pynotify contents to the Python 3.1 > folder. (under Libs\site-packages). You should be able to find the folder in > the Python 2.6 paths. > > Once you do that, you can try to use it. But I don't know if pynotify will > be able to run with Python 3.1. For instance, you might have to look into > the source code and make some changes. > > Better to consult with the author(s) of pynotify and consult them about the > difficulty to port to Py3. > > Cheers, > Xav > > Hello all, >> >> I'm trying to display system notifications in ubuntu.. I've >> tested pynotify in python 2.6 and it's working fine.. I want to know if i >> can do the same with python 3? I tried but there is no module named pynotify >> error is displayed.. Any of your help would be much appreciated.. >> >> >> > Hi Jebamnana, >> > > Jebagnana* > > Sorry. > > -Xav >

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Re: (a==b) ? 'Yes' : 'No'
by Den April 2, 2010

April 2, 2010

On Mar 30, 10:56 am, Steve Holden <st...(a)holdenweb.com> wrote: > John Nagle wrote: > > Chris Rebert wrote: > >> On Tue, Mar 30, 2010 at 8:40 AM, gentlestone <tibor.b...(a)hotmail.com> > >> wrote: > >>> Hi, how can I write the popular C/JAVA syntax in Python? > > >>> Java example: > >>> return (a==b) ? 'Yes' : 'No' > > >>> My first idea is: > >>> return ('No','Yes')[bool(a==b)] > > >>> Is there a more elegant/common python expression for this? > > >> Yes, Python has ternary operator-like syntax: > >> return ('Yes' if a==b else 'No') > > >> Note that this requires a recent version of Python. > > > Who let the dogs in? That's awful syntax. > > Yes, that's deliberately awful syntax. Guido designed it that way to > ensure that people didn't aver-use it, thereby reducing the readability > of Python applications. Speaking purely personally I hardly ever use it, > but don't dislike it. > > regards > Steve > -- > Steve Holden +1 571 484 6266 +1 800 494 3119 > See PyCon Talks from Atlanta 2010 http://pycon.blip.tv/ > Holden Web LLC http://www.holdenweb.com/ > UPCOMING EVENTS: http://holdenweb.eventbrite.com/ I've been following this thread for a few days now. My thoughts are that, in view of a long known widely used syntax for this operator, python's syntax seems like change for change sake. If current programing paradigm provides that particular trinary operator, why should python's be different from the previously well known one. For instance, no reasonable language designer would, now, use post-fix (I know about Forth) or allow only +=, -=, /=, etc. assignments ONLY. (Just as no reasonable car designer would put the accelerator pedal on the left.) There are conventions which should span products. Yes python has the trinary operator and it's not going to change, but this seems like a bit of petulance on the part of the designer. Den

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Re: Splitting a string
by Alex Willmer April 2, 2010

April 2, 2010

On Apr 2, 11:12 am, Thomas Heller <thel...(a)ctypes.org> wrote: > Maybe I'm just lazy, but what is the fastest way to convert a string > into a tuple containing character sequences and integer numbers, like this: > > 'si_pos_99_rep_1_0.ita' -> ('si_pos_', 99, '_rep_', 1, '_', 0, '.ita') > This is very probably not the fastest execution wise, it was the fastest development time wise: import re def maybe_int(x): try: return int(x) except ValueError: return x def strings_n_ints(s): return tuple(maybe_int(x) for x in re.findall('(\d+|\D+)', s)) >>> strings_n_ints('si_pos_99_rep_1_0.ita') ('si_pos_', 99, '_rep_', 1, '_', 0, '.ita') Alex

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pynotify for python 3.1.. Help Please..
by Jebagnana Das April 2, 2010

April 2, 2010

Hello all, I'm trying to display system notifications in ubuntu.. I've tested pynotify in python 2.6 and it's working fine.. I want to know if i can do the same with python 3? I tried but there is no module named pynotify error is displayed.. Any of your help would be much appreciated..

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subprocess.Popen objects: how to ensure that stdin is closed
by Harishankar April 2, 2010

April 2, 2010

I am writing a small app which requires input using stdin to the subprocess. I use the following technique: proc = subprocess.Popen (cmdargs, stdin=subprocess.PIPE) proc.stdin.write ("Something") proc.stdin.flush () ... proc.stdin.write ("something else") proc.stdin.flush () ... and so on. I cannot use communicate() because it waits till program termination and so obviously can be used once only. The problem is that I want to close the process and it's not responding either to proc.stdin.close() or even proc.terminate() which is in Python 2.6 (not in 2.5.x) So I am left with a mangled terminal. Is subprocess behaving funny or am I doing something wrong? I am not even sure if the proc.stdin.close () is respected because even without it, I am getting the same mangled state. I just want to control the commands using stdin.write and then close the process when done. -- Harishankar (http://harishankar.org http://literaryforums.org)

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idle 2.x and unicode literals
by Joe P. Cool April 2, 2010

April 2, 2010

Hi, I'm working with Python 2.6.4 on Ubuntu 9.10 and noticed a difference between IDLE and command line python. If I enter an é (accented e, LATIN SMALL LETTER E WITH ACUTE) as a unicode string in command line python I get this: >>> u'é' u'\xe9' In IDLE 2.6.4 I get this: >>> u'é' u'\xc3\xa9' IDLE is set to UTF-8 and console environment has LANG = en_US.UTF-8. This is a bit annyoing because ord(u'é') works on the command line but raises an exception in IDLE: >>> ord(u'é') Traceback (most recent call last): File "<pyshell#7>", line 1, in <module> ord(u'é') TypeError: ord() expected a character, but string of length 2 found Is this a bug? IDLE 3.1.1 works. Cheers, Joe

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Python and read archives?
by durumdara April 2, 2010

April 2, 2010

Hi! I want to make a multios (Win/Lin) Python based media catalog program, but I have a little problem with reading archives. Ok, Python supports zip and tar, but the world have more archives, like "rar", "7z", "tar.gz", "gz", etc. First I was happy with 7z.exe, because it is knows many formats, and 7z L "filename" command can retreive the list of files. Great! - I thought... But later I realized that password protection is halt the the 7z with password prompt. And I cannot ignore this with options as I see. So: I search for a solution to read archives (only filenames) if possible. I saw that 7z have callable dll, but I don't know, how to use it from python. Do you knows about a tool, or a code to read these archives, or or or...? Thanks for your help: dd -- Az Opera forradalmian új levelezőjét használva: http://www.opera.com/mail/

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Re: Developement Question?
by Tim Roberts April 2, 2010

April 2, 2010

Wayne <infotechsys(a)fairpoint.net> wrote: > >My town office uses Microsoft operating system. They have a proprietary >accounting system that uses excel for their accounting reports. >I would like to read these report and reproduce the report so that >the report can be seen on the web. If it were me, I'd just have Excel print to a PDF. No conversion, no scripting. There are a number of open source PDF converters. -- Tim Roberts, timr(a)probo.com Providenza & Boekelheide, Inc.

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Re: off topic but please forgive me me and answer
by Steven D'Aprano April 2, 2010

April 2, 2010

On Thu, 01 Apr 2010 22:34:46 -0500, Tim Chase wrote: >> Tim, I'm sure you know the answer to this, but for the benefit of the >> Original Poster, the problem is that you need to promote *both* >> divisions to floating point. Otherwise one of them will give int 0, >> which gives 0.0 when multiplied by 0.5. >> >>>>> 1.0/2 * 1/2.0 >> 0.25 > > You can get away with just promoting one of them...you just have to > promote the _correct_ one Doh! Of course you do. I knew that! -- Steven

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