🌐 Mailman 3 October 2008 - Python-list - python.org

Re: Code not work - DESPERATE HELP :(
by Bill McClain Oct. 31, 2008

Oct. 31, 2008

On 2008-10-30, fx5900 <luong8201(a)hotmail.com> wrote: > I just went to go and get a coffee when i noticed a email, thought it was > just usual spam. Read your message, and it worked. it was because i did not > put they 'python' keyword infront. How did u figure it out? It is some problem with the DOS box on Windows. I believe the standard input and output get lost somehow. I just encountered it myself. Using the "python" command is not required on other platforms--Linux, for example. If anyone has a more elegant solution I would like to hear it. I hate documenting "this way on Windows, another way everywhere else..." -Bill -- Sattre Press In the Quarter http://sattre-press.com/ by Robert W. Chambers info(a)sattre-press.com http://sattre-press.com/itq.html

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Re: "xxx.has_key(a)" vs "a in xxx"
by Ben Finney Oct. 31, 2008

Oct. 31, 2008

Łukasz Ligowski <orangewarrior(a)gmail.com> writes: > 2.5 docs say that: > "a.has_key(k) Equivalent to k in a, use that form in new code" > > 2.6 docs say that: > "dict.has_key(key) is equivalent to key in d, but deprecated." > > which is true? Both are true, and are different ways of saying the same thing. ‘a.has_key(k)’ is deprecated, use ‘k in a’ in new code. You might be confused by the ambiguous referent for “that form” in the passage from the 2.5 docs. The meaning is made more clear in the passage you quote from the 2.6 docs. -- \ “The most common of all follies is to believe passionately in | `\ the palpably not true. It is the chief occupation of mankind.” | _o__) —Henry L. Mencken | Ben Finney

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Graphical object browser
by Jason Oct. 30, 2008

Oct. 30, 2008

Hi, I've spent all day looking for a graphical object browser for Python 2.5 under Debian GNU/Linux, ie. something I can just drop into my code with an import and a "browse(my_object)" statement. So far I've only found intractable GUI toolkits or obsolete, non-functional scripts. I was wondering if there is a simple tool like this out there somewhere. Preferably one that doesn't involve me installing a massive IDE, but I can't really be picky. Cheers, Jason

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modifying locals
by John [H2O] Oct. 30, 2008

Oct. 30, 2008

I would like to write a function to write variables to a file and modify a few 'counters'. This is to replace multiple instances of identical code in a module I am writing. This is my approach: def write_vars(D): """ pass D=locals() to this function... """ for key in D.keys(): exec("%s = %s" % (key,D[key])) outfile.write(...) numcount += 1 do this, do that... the issue is that at the end, I want to return outfile, numcount, etc... but I would prefer to not return them explicitly, that is, I would just like that the modified values are reflected in the script. How do I do this? Using global? But that seems a bit dangerous since I am using exec. Bringing up another matter... is there a better way to do this that doesn't use exec? Thanks! -- View this message in context: http://www.nabble.com/modifying-locals-tp20255725p20255725.html Sent from the Python - python-list mailing list archive at Nabble.com.

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open a shell prompt froma python program
by gaurav kashyap Oct. 30, 2008

Oct. 30, 2008

Dear all, Can u tell me a python program that when executed in a shell prompt,opens another shell prompt. Simply i want to open a shell prompt from a python program. Thanks

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Web crawler on python
by yura Oct. 30, 2008

Oct. 30, 2008

I need simple web crawler, I found Ruya, but it's seems not currently maintained. Does anybody know good web crawler on python or with python interface? http://watch-me.890m.com

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Re: Python suitable for Midi ?
by J Kenneth King Oct. 30, 2008

Oct. 30, 2008

Derek Martin <code(a)pizzashack.org> writes: > On Tue, Oct 28, 2008 at 06:54:57PM +0200, Chuckk Hubbard wrote: >> The problem I've run into is that I can't set the audio to a higher >> priority than the GUI (Tkinter). If I move the mouse over the app, no >> matter what, I get audio dropouts. AFAICT this is the same for all >> Python, regardless of what modules one uses: you can't assign system >> priorities to different threads. If you're planning to pipe MIDI to >> another app for playback, maybe it won't be an issue for you. > > FWIW... You could take your own advice, and devide your application > in two: one process manages the GUI, and the second is a back-end > process that plays the MIDI. Your GUI can even launch the back end, > which will inherit the priority of the GUI, after which the GUI can > reduce its own priority (the priority of the back end will not be > affected by the change)... > > > -- > Derek D. Martin > http://www.pizzashack.org/ > GPG Key ID: 0x81CFE75D One also has access to nice-levels on unix systems.

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Re: Printing with interspersed element
by Paulo J. Matos Oct. 30, 2008

Oct. 30, 2008

On Thu, Oct 30, 2008 at 8:42 PM, Arnaud Delobelle <arnodel(a)googlemail.com> wrote: > On Oct 30, 8:07 pm, "Paulo J. Matos" <p...(a)ecs.soton.ac.uk> wrote: >> Hi all, >> >> I guess this is a recurring issue for someone who doesn't really know >> the python lib inside out. There must be a simple way to do this. >> I have a list of objects [x1, x2, x3, ..., xn] and I have defined a >> print method for them print_obj(). Now I want to print them >> intersepersed by an element. >> If I print [x1, x2, x3] interspersed by the element 10: >> x1.print_obj() 10 x2.print_obj() 10 x3.print_obj() >> >> Now, the question is, what's the best way to do this? > > Defining a print_obj() method is probably a bad idea. What if you > want to print to a file for example? Instead you can define a > __str__() method for your objects and then use the join() method of > strings like this: > > print ' 10 '.join(str(x) for x in lst) > Thanks for the tip but that has an issue when dealing with potentially millions of objects. You are creating a string in memory to then dump to a file [or screen] while you could dump to the file [or screen] as you go through the original string. Right? > HTH > > -- > Arnaud > > -- > http://mail.python.org/mailman/listinfo/python-list > > > -- Paulo Jorge Matos - pocmatos at gmail.com Webpage: http://www.personal.soton.ac.uk/pocm

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Re: Printing with interspersed element
by Grant Edwards Oct. 30, 2008

Oct. 30, 2008

On 2008-10-30, Paulo J. Matos <pocmatos(a)gmail.com> wrote: >> print ' 10 '.join(str(x) for x in lst) > > Thanks for the tip but that has an issue when dealing with potentially > millions of objects. You are creating a string in memory to then dump > to a file [or screen] while you could dump to the file [or screen] as > you go through the original string. Right? Right, but your original post didn't specify that you had millions of items. The best solution for a few dozen or a few hundred items is often different the the best solution for millions of items. The more accurate your question, the more useful the replies. -- Grant Edwards grante Yow! I haven't been married at in over six years, but we visi.com had sexual counseling every day from Oral Roberts!!

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Re: Code not work - DESPERATE HELP :(
by Bill McClain Oct. 30, 2008

Oct. 30, 2008

On 2008-10-30, fx5900 <luong8201(a)hotmail.com> wrote: > Hi, > i am trying to convert an .osm (openstreetmap) file into gml format and > finally to shapefile given this wiki info > http://wiki.openstreetmap.org/index.php/GML. I'm using windows and when i > entered the following commands osm2gml.py < map_01_data.osm > > map_01_data.gml on my dos prompt i get a number of errors, some of which > are bellow: Does this give any better results: python osm2gml.py < map_01_data.osm > map_01_data.gml -Bill -- Sattre Press In the Quarter http://sattre-press.com/ by Robert W. Chambers info(a)sattre-press.com http://sattre-press.com/itq.html

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