Pydev 1.4.7 Released
Hi All, Pydev and Pydev Extensions 1.4.7 have been released Details on Pydev Extensions: http://www.fabioz.com/pydev Details on Pydev: http://pydev.sf.net Details on its development: http://pydev.blogspot.com Release Highlights in Pydev Extensions: - * The interactive console can be used on the remote debugger * Remote debugger properly redirects contents from the server on multiple runs. * Providing context-independent completions when other completions are not available (until now, it only gave those completions for method parameters) * The number of chars required to show the context-insensitive completion can now be customized. * Fixed problem with Eclipse 3.5: Invalid Thread Access when trying to rename a class Release Highlights in Pydev: -- * Iron Python support * Fixed issue when configuring interpreter on Eclipse 3.3 and 3.2 (was using API only available in 3.4) * Google App Engine o Popup menus for google app engine are now working with eclipse 3.2 o Fixed issues when google app engine project has spaces in path * Launching o Ctrl+F9 can be used to run as unit-test and select which tests will be run o F9 will now run the current editor based on the project type o Changed run icons o Run configurations can be created for the project o Run as unit-test can have --filter and --tests as a parameter set in the run configuration * Shift left can now shift even when there are less chars than the required indent string * Top-level modules on .egg files are now properly recognized * Auto-config fixed * Fixed problem when .pydevproject was not a parseable xml file (the pydev package explorer wouldn't work because of that) * When a new interpreter is created, it's properly selected in the tree * Code-completion better heuristic when analyzing function return that's called on self. * Code-completion in the interactive console now handles import sections correctly * Code formatter: Spaces after square and curly braces are no longer changed when an unary operator is found afterwards * Fixed problem when recognizing encodings (regexp was not correct) What is PyDev? --- PyDev is a plugin that enables users to use Eclipse for Python, Jython and Iron Python development -- making Eclipse a first class Python IDE -- It comes with many goodies such as code completion, syntax highlighting, syntax analysis, refactor, debug and many others. Cheers, -- Fabio Zadrozny -- Software Developer Aptana http://aptana.com/python Pydev Extensions http://www.fabioz.com/pydev Pydev - Python Development Environment for Eclipse http://pydev.sf.net http://pydev.blogspot.com -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations/
Re: Python Error from Apress book
En Wed, 08 Jul 2009 06:35:54 -0300, Dave Angel da...@ieee.org escribió: Gabriel Genellina wrote: Jul 2009 09:55:13 -0300, Dave Angel da...@ieee.org escribió: Gabriel Genellina wrote: En Mon, 06 Jul 2009 19:56:40 -0300, matt0177 matt0...@gmail.com escribió: When I try to run the command as outlined in the book simple_markup2.py test_input.txt test_output.html i get the following error every time. IOError: [Errno 9] Bad file descriptor I think the error depends on the specific OS version/service pack. But at least on XP this appears to fix it: http://support.microsoft.com/kb/321788/en-us Thanks for the link. Looking at that one, it indicates that Windows 2000 fixed it in SP4, and XP fixed it in Sp1. But I'm already running XP SP3, so I wonder if it's something new. I'm using XP SP3 too. Before applying the registry fix, stdout and stderr were working fine, but not stdin. After making the registry change, stdin works too. I didn't notice the issue with stdin until now (I don't use stdin very often) -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: PyQt GUI
On Jul 9, 11:29 am, Robert Kern robert.k...@gmail.com wrote: On 2009-07-08 18:10, Helvin wrote: Thanks for the fast replies! I will look into how to use VTK now. Where would I find VTK's explicit support for PyQt? Wrapping/Python/vtk/qt4/ in the VTK sources. Because I have installed VTK (using its installer) and pyVTK (using its setup.py file), but how do I actually use it in my code? According to:http://www.nabble.com/embedded-VTK-window-in-PyQt-application-td23521..., I have tried 'import vtk', but python can't find the vtk module. Then you have not installed VTK's Python bindings correctly. Note that pyVTK is just a library for manipulating VTK files. The VTK Python bindings are part of VTK's distribution itself. Exactly how did you install VTK? Did you compile it yourself? -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco You mean, when I download VTK, the VTK Python bindings come with it? I downloaded VTK from:http://vtk.org/files/release/5.4/ I downloaded pyVTK from: http://pypi.python.org/pypi/PyVTK/0.4.67 And then installed it by the command 'python setup.py install' according to: http://cens.ioc.ee/projects/pyvtk/ I understand that this command runs the file called 'setup.py' that came with the pyVTK download. Thanks so much for your help! I am very desperate now... Helvin -- http://mail.python.org/mailman/listinfo/python-list
Re: tough-to-explain Python
Dave Angel wrote: By the time I graduated, I had five six-level languages ^^^ Are they languages that you have to edit using vi? :-) -- Greg -- http://mail.python.org/mailman/listinfo/python-list
Re: Pydev 1.4.7 Released
On 2009-07-08, Fabio Zadrozny fabi...@gmail.com wrote: Hi All, Pydev and Pydev Extensions 1.4.7 have been released Details on Pydev Extensions: http://www.fabioz.com/pydev Details on Pydev: http://pydev.sf.net Details on its development: http://pydev.blogspot.com Nice! Will this work in Eclipse 3.5 as well? -- Morten Nygaard Åsnes http://twitter.com/mortenaa http://identi.ca/mortenaa -- http://mail.python.org/mailman/listinfo/python-list
Re: [0, 0, 0, 1, 1, 1, 0] ... remove all 0 values
Paul Rubin wrote: Daniel Austria writes: just one question. How can i remove all 0 values in a list? I prefer: newlist = list(x for x in oldlist if x != 0) to the square bracket list comprehension that a few people have suggested. This is because in python 2.x, the listcomp leaks its index variable into the surrounding scope, but the generator expression above doesn't. As you indicated, that's been fixed in Py3, though. So if your code works in Py3.x, you can be somewhat sure that the leak doesn't have side effects. Plus, it's pretty easy to ignore those leaks as long as you use a suitable name for the loop variable. Also note that the performance characteristics may not be identical in both cases, depending on where you run your code. Cython, for example, will write a list comprehension out as a rather straight C loop, but when we implement generator expressions in Cython, it may have to get turned into a generator function instead of a loop, so that you'd get a much larger overhead than for the plain list comprehension (although in the simple case above it would likely get optimised away). CPython shows a similar difference: $ python3.1 -m timeit '[x for x in range(1000) if x]' 1 loops, best of 3: 170 usec per loop $ python3.1 -m timeit -s 'r=[i%2 for i in range(2000)]' \ '[x for x in r if x]' 1000 loops, best of 3: 222 usec per loop $ python3.1 -m timeit 'list(x for x in range(1000) if x)' 1000 loops, best of 3: 227 usec per loop $ python3.1 -m timeit -s 'r=[i%2 for i in range(2000)]' \ 'list(x for x in r if x)' 1000 loops, best of 3: 280 usec per loop Not that I'd consider those numbers worth bothering... Stefan -- http://mail.python.org/mailman/listinfo/python-list
Re: Emacs Python-mode. Newbie problem.
On Jul 8, 10:54 pm, Piet van Oostrum p...@cs.uu.nl wrote: Lacrima lacrima.ma...@gmail.com (L) wrote: L Hello! L I have just started using Emacs to write python scripts. L I installed python-mode.el L Then I just tried this code: L print 'hello world' L When I press C-c RET, new blank window is opened and emacs says: L (Shell command succeeded with no output) L So where is my 'hello world'? L When I do C-c C-c, it prints 'hello world' successfully. L Why in the first case I get no output? Can you check in the buffer where you have the python code what command C-c RET is bound to? With C-h k C-c RET Shell command succeeded with no output suggests that is has a different binding than the standard one in python-mode. Did you happen to name your file 'test' or 'test.py? C-c RET does an import and 'import test' imports a standard module test. -- Piet van Oostrum p...@cs.uu.nl URL:http://pietvanoostrum.com[PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org Hi, Piet! Thanks for your reply! My file name is 'trains.py'. When I do C-h k C-c RET, it shows me help from manual: C-c RET runs the command py-execute-import-or-reload which is an interactive Lisp function in `python-mode'... and so on. And still when I do C-c RET, I receive (Shell command succeeded with no output) Any more help would be really appreciated, because I am newbie with Emacs. With regards, Max -- http://mail.python.org/mailman/listinfo/python-list
can i write a assemly language programs in python
can any one tell me how to write assembly language programs in python...if no is there any other way to write the programs in python Reddi prasad reddy ph.no:09958083797 -- http://mail.python.org/mailman/listinfo/python-list
Re: count
a...@pythoncraft.com (Aahz) writes: When dealing with small N, O() can get easily swamped by the constant factors. How often do you deal with more than a hundred fields? The number of fields in the OP's post was not stated. Expecting it to be less than 100 seems like an ill-advised presumption. If N is unknown, speed-tuning the case where N is small at the expense of consuming monstrous amounts of memory when N is large sounds somewhere between a premature optimization and a nasty bug. -- http://mail.python.org/mailman/listinfo/python-list
PyGtk Depends on Numeric
Get with the times people and port to numpy. :P Don't you think its about time? ~Pete -- http://mail.python.org/mailman/listinfo/python-list
Re: ... remove all 0 values
Thanks a lot for your advices, i decided to use the filter() method to sort out the 0. i can ´t use the sum() function cause i need the list afterwards best, Dan -- http://mail.python.org/mailman/listinfo/python-list
i need immediate help from u
i m new this community .; can any one send me the solution for writing the assembly language programs in python my mail ID:redd@gmail.com id%3aredd@gmail.com -- http://mail.python.org/mailman/listinfo/python-list
Re: i need immediate help from u
On Thu, Jul 9, 2009 at 12:25 AM, m.reddy prasad reddyreddy@gmail.com wrote: i m new this community .; can any one send me the solution for writing the assembly language programs in python my mail ID:redd@gmail.com Please read http://catb.org/esr/faqs/smart-questions.html Cheers, Chris -- http://blog.rebertia.com -- http://mail.python.org/mailman/listinfo/python-list
Re: regex help
David wrote:
tdnbsp;/td
td width=1% class=keyOpen:
/td
td width=1% class=val5.50
/td
tdnbsp;/td
td width=1% class=keyMkt Cap:
/td
td width=1% class=val6.92M
/td
tdnbsp;/td
td width=1% class=keyP/E:
/td
td width=1% class=val21.99
/td
I want to extract the open, mkt cap and P/E values - but apart from
doing loads of indivdual REs which I think would look messy, I can't
think of a better and neater looking way. Any ideas?
from BeautifulSoup import BeautifulSoup
bs = BeautifulSoup(tdnbsp;/td
...
... td width=1% class=keyOpen:
... /td
... td width=1% class=val5.50
... /td
... tdnbsp;/td
... td width=1% class=keyMkt Cap:
... /td
... td width=1% class=val6.92M
... /td
... tdnbsp;/td
... td width=1% class=keyP/E:
... /td
... td width=1% class=val21.99
... /td
... )
for key in bs.findAll(attrs={class: key}):
... value = key.findNext(attrs={class: val})
... print key.string.strip(), --, value.string.strip()
...
Open: -- 5.50
Mkt Cap: -- 6.92M
P/E: -- 21.99
--
http://mail.python.org/mailman/listinfo/python-list
Re: Problem reading file with umlauts
Thanks a lot. I will try that on the weekend. Claus Claus Hausberger wrote: Thanks a lot. Now I am one step further but I get another strange error: Traceback (most recent call last): File ./read.py, line 12, in module of.write(text) UnicodeEncodeError: 'ascii' codec can't encode character u'\ufeff' in position 0: ordinal not in range(128) according to google ufeff has something to do with byte order. I use an Linux system, maybe this helps to find the error. 'text' contains Unicode, but you're writing it to a file that's not opened for Unicode. Either open the output file for Unicode: of = codecs.open(umlaut-out.txt, w, encoding=latin1) or encode the text before writing: text = text.encode(latin1) (I'm assuming you want the output file to be in Latin1.) Claus Hausberger wrote: I have a text file with is encoding in Latin1 (ISO-8859-1). I can't change that as I do not create those files myself. I have to read those files and convert the umlauts like ö to stuff like oumol; as the text files should become html files. umlaut-in.txt: This file is contains data in the unicode character set and is encoded with utf-8. Viele Röhre. Macht spaß! Tsüsch! umlaut-in.txt hexdump: 00: 54 68 69 73 20 66 69 6C 65 20 69 73 20 63 6F 6E This file is con 10: 74 61 69 6E 73 20 64 61 74 61 20 69 6E 20 74 68 tains data in th 20: 65 20 75 6E 69 63 6F 64 65 0D 0A 63 68 61 72 61 e unicode..chara 30: 63 74 65 72 20 73 65 74 20 61 6E 64 20 69 73 20 cter set and is 40: 65 6E 63 6F 64 65 64 20 77 69 74 68 20 75 74 66 encoded with utf 50: 2D 38 2E 0D 0A 56 69 65 6C 65 20 52 C3 B6 68 72 -8...Viele R..hr 60: 65 2E 20 4D 61 63 68 74 20 73 70 61 C3 9F 21 20 e. Macht spa..! 70: 20 54 73 C3 BC 73 63 68 21 0D 0A 00 00 00 00 00 Ts..sch!... umlaut.py: # -*- coding: utf-8 -*- import codecs text=codecs.open(umlaut-in.txt,encoding=utf-8).read() text=text.replace(uö,uoe) text=text.replace(uß,uss) text=text.replace(uü,uue) of=open(umlaut-out.txt,w) of.write(text) of.close() umlaut-out.txt: This file is contains data in the unicode character set and is encoded with utf-8. Viele Roehre. Macht spass! Tsuesch! umlaut-out.txt hexdump: 00: 54 68 69 73 20 66 69 6C 65 20 69 73 20 63 6F 6E This file is con 10: 74 61 69 6E 73 20 64 61 74 61 20 69 6E 20 74 68 tains data in th 20: 65 20 75 6E 69 63 6F 64 65 0D 0D 0A 63 68 61 72 e unicode...char 30: 61 63 74 65 72 20 73 65 74 20 61 6E 64 20 69 73 acter set and is 40: 20 65 6E 63 6F 64 65 64 20 77 69 74 68 20 75 74 encoded with ut 50: 66 2D 38 2E 0D 0D 0A 56 69 65 6C 65 20 52 6F 65 f-8Viele Roe 60: 68 72 65 2E 20 4D 61 63 68 74 20 73 70 61 73 73 hre. Macht spass 70: 21 20 20 54 73 75 65 73 63 68 21 0D 0D 0A 00 00 ! Tsuesch!. -- The ability of the OSS process to collect and harness the collective IQ of thousands of individuals across the Internet is simply amazing. - Vinod Valloppillil http://www.catb.org/~esr/halloween/halloween4.html -- http://mail.python.org/mailman/listinfo/python-list -- Neu: GMX Doppel-FLAT mit Internet-Flatrate + Telefon-Flatrate für nur 19,99 Euro/mtl.!* http://portal.gmx.net/de/go/dsl02 -- http://mail.python.org/mailman/listinfo/python-list
Re: Clarity vs. code reuse/generality
En Wed, 08 Jul 2009 23:19:25 -0300, kj no.em...@please.post escribió: In mailman.2700.1246895025.8015.python-l...@python.org Tim Rowe digi...@gmail.com writes: 2009/7/4 kj no.em...@please.post: Precisely. =A0As I've stated elsewhere, this is an internal helper function, to be called only a few times under very well-specified conditions. =A0The assert statements checks that these conditions are as intended. =A0I.e. they are checks against the module writer's programming errors. Good for you. I'm convinced that you have used the assertion appropriately, and the fact that so many here are unable to see that looks to me like a good case for teaching the right use of assertions. For what it's worth, I read assertions at the beginning of a procedure as part of the specification of the procedure, and I use them there in order to document the procedure. An assertion in that position is for me a statement to the user of the procedure it's your responsibility to make sure that you never call this procedure in such a way as to violate these conditions. They're part of a contract, as somebody (maybe you) pointed out. As somebody who works in the safety-critical domain, it's refreshing to see somebody teaching students to think about the circumstances in which a procedure can legitimately be called. The hostility you've received to that idea is saddening, and indicative of why there's so much buggy software out there. Thanks for the encouragement. When I teach programming, the students are scientists. For the stuff they do, correctness of the code trumps everything else. I teach them to view assertions as way of translating their assumptions into code. And by this I mean not only assumptions about the correctness of their code (the typical scope of assertions), but also, more broadly, assumptions about the data that they are dealing with (which often comes from external sources with abysmal quality control). Nobody says you shouldn't check your data. Only that assert is not the right way to do that. Ok, it's easier to write: assert x0 and y0 and xy instead of: if not (x0 and y0 and xy): raise ValueError, x=%r y=%r % (x,y) but the assert statement is completely ignored if your script is run with the -O option, and then no check is done. assert should be used only to verify internal correctness only - to detect wrong assumptions in the *code* itself. Once you're confident the code is OK, you may turn off assertions (and improve program speed). But you must *always* validate input data no matter what - so assert is not the right tool. Even worse, never DO anything inside an assertion - it won't be done in the optimized version. This method becomes almost empty when assertions are removed (not the intended behavior!): def process_all(self): for item in self.items: assert self.process(item) My scientific code is jam-packed with assertions. I can't count the number of times that one such lowly assertion saved me from a silent but potentially disastrous bug. And yes I find it distressing that so so few programmers in my line of work use assertions at all. I'm just saying that some of those assertions probably should be real if ... raise statements instead - not that you remove the checks. You may use this short function, if you prefer: def fassert(condition, message='', exc_type=AssertionError): if not condition: raise exc_type(message) -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Check file is locked?
On Jul 8, 12:45 pm, Tim Golden m...@timgolden.me.uk wrote: Rajat wrote: On Jul 8, 4:57 am, Lawrence D'Oliveiro l...@geek- central.gen.new_zealand wrote: In message mailman.2795.1246997268.8015.python-l...@python.org, Christian Heimes wrote: By the way most operating systems don't lock a file when it's opened for reading or writing or even executed. The general conclusion seems to be that mandatory locking is more trouble than it's worth. My OS is a windows XP sp3. All I'm trying to achieve is to close an application ( which could be a notepad, a wordpad or some other text editor) that have opened my file. Once the file is closed I can easily delete that file. I guess, if file is opened by one of that application, the file must be locked and so is the reason I cannot delete the file. I assume that your real requirement is: I can't open/close/delete this file; it must be locked by something else; what is that something else? The simplest thing is probably to run sysinternals' handle util: http://technet.microsoft.com/en-us/sysinternals/bb896655.aspx and use the subprocess module to parse the output. That will give you the pid, and you can then use, eg, psutil: http://code.google.com/p/psutil/ to get the details of the process. TJG- Hide quoted text - - Show quoted text - I've used the Handle.exe and got the following results: -- notepad.exe pid: 3540 COMP\rajatd C: File (RW-) C:\Documents and Settings\rajatd\Desktop 10: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 44: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 7C: Section \BaseNamedObjects\ShimSharedMemory -- wordpad.exe pid: 2212 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents I've also parsed this output for the PIDS. But no where in the result I got to know what file has been associated with a PID. Does for this I need to use pustil? -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter problem
Paul Simon wrote: Chris Rebert c...@rebertia.com wrote in message news:mailman.2863.1247095339.8015.python-l...@python.org... On Wed, Jul 8, 2009 at 4:18 PM, Paul Simonpsi...@sonic.net wrote: I have the tkinter problem and need some assistance to straighten it out. From the web page http://wiki.python.org/moin/TkInter; I tested as in step 1 and cannot import _tkinter. I do not have that file on my computer, but do have tkinter.py in /usr/local/lib/python2.6/lib-tk. as well as the directories /usr/lib/tk8.5 and /usr/lib/tcl8.5. This python stuff is great, but the documentation frequently feels like it is just a bit out of my grasp. I realize that all of this is free but I understand the instructions on the web page to repair only to the point of confusion. I'm not an expert. How do I modify my python configuration? Is there a file that needs to be edited? Which setup.py file do I use? Make? or python setup.py build and python setup.py install? Thanks. I appreciate your help. - How did you install Python? - What Linux distro are you using? Cheers, Chris http://blog.rebertia.com Im using Mandriva 2008.1. I have to tell you honestly that I'm not sure exactly how I installed Python. Originally I had installed 2.5 from RPM but 2.6 was not available for my distro (2008.1) in RPM. I downloaded something from python.org and installed. Not sure if it was tarball or zip file. Zip or tar doesn't matter, you are installing from source. Python has to find the necessary include files for tcl/tk. These are in separate packages that you have to install before you invoke Python's configure script. I don't know what they are called on your system -- look for tk-dev.rpm, tcl-dev.rpm or similar. You may run into the same problem with other modules like readline. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem with list of dicts and copying
En Wed, 08 Jul 2009 14:09:43 -0300, Cameron Pulsford cameron.pulsf...@gmail.com escribió: I'm representing the board as a dictionary, where the keys are (x, y) positions, and the values are candidates. So my program goes along picking numbers from the list of candidates and then propagating the constraints. [...]Basically my boards list should be copies of good boards, and when I need to refresh the current board, I want to pull off a copy of the correct one. [...] this isn't happening. I am always modifying the same board. You have a dictionary whose values are lists, ok? The copy() method doesn't make a copy of those lists - only of the dictionary itself. Try using the deepcopy function in the copy module: http://docs.python.org/library/copy.html -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Check file is locked?
Rajat wrote: I've used the Handle.exe and got the following results: -- notepad.exe pid: 3540 COMP\rajatd C: File (RW-) C:\Documents and Settings\rajatd\Desktop 10: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 44: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 7C: Section \BaseNamedObjects\ShimSharedMemory -- wordpad.exe pid: 2212 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents I've also parsed this output for the PIDS. But no where in the result I got to know what file has been associated with a PID. Does for this I need to use pustil? Well unless I'm missing your point considerably, the output tells you all you need to know: notepad.exe (pid 3540) has some kind of handle open on the desktop, the common controls DLL and an area of shared memory. As has been pointed out elsewhere, notepad doesn't hold the file open which it's editing: it opens it, reads the contents, and closes it again. For demonstration purposes: code import os, sys import subprocess f = open (sys.executable) subprocess.call ([handle, sys.executable]) f.close () /code TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: windows command-line
En Wed, 08 Jul 2009 14:23:54 -0300, Emile van Sebille em...@fenx.com escribió: On 7/8/2009 10:07 AM Lucas Junqueira said... Hi, I'd like to run a simple windows command-line program from within my python script and agt all the returt it generates. Is this possible? How can I do it? Depending on python version, look into subprocess, commands or os.pipe and related. commands is Unix only, and os.pipe by itself doesn't solve the problem - so we are left with subprocess, and that would be my reccomendation too. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Hello
Hi ... I have been trying to set this 2-D array of this sort. 0 10 20 ... 1000 1 11 21... 1000 Here is the code i tried ... arr=[] for i in range(0,1010,10): arr.append([]) for j in range(0,1001,1): arr[i].append(i+j) print arr I am getting the following error list index out of range Please let me know where am i getting wrong. Sincerely tank -- http://mail.python.org/mailman/listinfo/python-list
Re: python3 fail to start
On Jun 30, 3:43 pm, ts thaisi...@gmail.com wrote: i just install the python 3.1 dmg onto my mac. when i run python3, it fail with : Fatal Python error: Py_Initialize: can't initialize sys standard streamsLookupError: unknown encoding: Abort trap couldnt understand the problem. anyone can help? Any chance you could give us some feedback about your system? The Python devs are working to fix the problem: http://bugs.python.org/issue6393 but it would be really helpful to know: - what version of OS X you're using - what output you get when you type 'locale' at a Terminal prompt - what the International settings are in your Terminal preferences (Terminal preferences - Settings - Advanced tab): what's the setting for the character encoding, and do you have the 'Set LANG environment variable at startup' checkbox checked? I managed to reproduce the crash by starting python3 (again at a Terminal prompt) with: LANG=UTF-8 python3 So I suspect that your locale settings are part of the problem. As a temporary workaround, something like LANG=en_US.UTF-8 python3 might work. (Substitute whatever language setting is appropriate for you in place of en_US.) Thanks! Mark -- http://mail.python.org/mailman/listinfo/python-list
Re: Hello
Tanmoy wrote: T Hi ... I have been trying to set this 2-D array of this sort. 0 10 20 ... 1000 1 11 21... 1000 Here is the code i tried ... arr=[] for i in range(0,1010,10): arr.append([]) for j in range(0,1001,1): arr[i].append(i+j) print arr I am getting the following error list index out of range Please let me know where am i getting wrong. The value of 'i' goes 0, 10, ..., etc. When i==0 you append an empty list to arr, so arr[i] is arr[0]. No problem. When i==10 you append another empty list to arr, so arr[i] is arr[10]. Index error because there's no arr[10], only arr[0] and arr[1]. -- http://mail.python.org/mailman/listinfo/python-list
Re: can i write a assemly language programs in python
En Thu, 09 Jul 2009 04:17:52 -0300, m.reddy prasad reddy reddy@gmail.com escribió: can any one tell me how to write assembly language programs in python...if no is there any other way to write the programs in python You write Python programs using Python, not assembly. Perhaps if you provide more info on what you want to do, someone can suggest a different way... -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
subprocess + python-daemon - bug/problem?
Hi all,
I'm trying to daemonize a python program, and occasionally have it run
subprocesses, however I'm running into a nasty error, as follows:
File /users/rsg/ancl/devcocast/devcocast-svn/scripts/DaemonSpawnTes
t.py, line 5, in module
subprocess.Popen('echo 1').wait()
File /usr/lib64/python2.5/subprocess.py, line 594, in __init__
errread, errwrite)
File /usr/lib64/python2.5/subprocess.py, line 1089, in _execute_ch
ild
os.waitpid(self.pid, 0)
OSError: [Errno 10] No child processes
The minimal testcase showing this problem is as follows:
import daemon
import subprocess
daemon.DaemonContext(stderr = open(fakeConsole.txt,w+)).open()
subprocess.Popen('echo 1').wait()
So there is no threading going on (I've found some bugs relating to
subprocess and threading). I'm using Fedora 10, Python 2.5.2, and
python-daemon 1.4.6 from here http://pypi.python.org/pypi/python-daemon/
.
If anyone can shed some light on the situation, I'd be extremely
grateful!
Yours,
Andy
--
http://mail.python.org/mailman/listinfo/python-list
older pythons
hi everybody. i have a certain set of old python scripts and data used by said scripts which were written using python 2.3 in particular i used some features which were later modified or deprecated by the language newer versions (e.g.: cmp(), print as keyword, and such...) for reasons i find hard to explain briefly, it is unfeasible at the moment to modify scripts and data to adapt to the changes now: i ask if it is possible to have different versions of python installed on my system (linux debian) so that i can continue to use python 2.3 (as python from the shell) but i can also use - say - python 3.1 (maybe as python3.1 from the shell) if yes: is there a known recommended way to do so? thanks a lot bye -- http://mail.python.org/mailman/listinfo/python-list
hoe to build a patched socketmodule.c
Hi all, I need to patch socketmodule.c (the _socket module) in order to add support to an experimental socket family. I'm guessing about the patched module build process: does a stand alone build script using distutils makes sense, or have I to patch sockmodule.c, eventualy rename it, modify setup.py inside python sources to let it know about the new module, and then rebuild whole python? I think the latter makes more sense, because I suppose socketmodule could not be build stand alone, but need the whole python build system, in order to have right definition specified by a Makefile generated by autotools from inside python sources. Or maybe distutils is able to retreive the whole build system? I don't think so, because there are no requirement about having python source tree installed. If I have to go for the second way, then how could I distribuite the patched _socket module? I could not use distutils, have I to distribuite the already built .so with only a script to install it, and the source code in another directory? Thanks a lot jacopo PS correct my english please, is the only way I have to improve it! -- http://mail.python.org/mailman/listinfo/python-list
Re: subprocess + python-daemon - bug/problem?
My apologies, the python code should have been:
import daemon
import subprocess
daemon.DaemonContext(stderr = open(fakeConsole.txt,w+)).open()
subprocess.Popen(['echo','1']).wait()
However the error remains the same.
Yours,
Andy
On Jul 9, 10:26 am, Andy Clegg andy...@gmail.com wrote:
Hi all,
I'm trying to daemonize a python program, and occasionally have it run
subprocesses, however I'm running into a nasty error, as follows:
File /users/rsg/ancl/devcocast/devcocast-svn/scripts/DaemonSpawnTes
t.py, line 5, in module
subprocess.Popen('echo 1').wait()
File /usr/lib64/python2.5/subprocess.py, line 594, in __init__
errread, errwrite)
File /usr/lib64/python2.5/subprocess.py, line 1089, in _execute_ch
ild
os.waitpid(self.pid, 0)
OSError: [Errno 10] No child processes
The minimal testcase showing this problem is as follows:
import daemon
import subprocess
daemon.DaemonContext(stderr = open(fakeConsole.txt,w+)).open()
subprocess.Popen('echo 1').wait()
So there is no threading going on (I've found some bugs relating to
subprocess and threading). I'm using Fedora 10, Python 2.5.2, and
python-daemon 1.4.6 from herehttp://pypi.python.org/pypi/python-daemon/
.
If anyone can shed some light on the situation, I'd be extremely
grateful!
Yours,
Andy
--
http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
The recommended Debian way is update-alternatives. I find it a bit unintuitive, so I have to read through the documentation every time I use it, but it should be able link a chosen version of python to /usr/ bin/python. I don't know if it's set up by default, I have only one version installed. -- Adrian -- http://mail.python.org/mailman/listinfo/python-list
Re: Check file is locked?
On Jul 9, 1:21 pm, Tim Golden m...@timgolden.me.uk wrote: Rajat wrote: I've used the Handle.exe and got the following results: ------ notepad.exe pid: 3540 COMP\rajatd C: File (RW-) C:\Documents and Settings\rajatd\Desktop 10: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 44: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 7C: Section \BaseNamedObjects\ShimSharedMemory ------ wordpad.exe pid: 2212 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents I've also parsed this output for the PIDS. But no where in the result I got to know what file has been associated with a PID. Does for this I need to use pustil? Well unless I'm missing your point considerably, the output tells you all you need to know: notepad.exe (pid 3540) has some kind of handle open on the desktop, the common controls DLL and an area of shared memory. As has been pointed out elsewhere, notepad doesn't hold the file open which it's editing: it opens it, reads the contents, and closes it again. For demonstration purposes: code import os, sys import subprocess f = open (sys.executable) subprocess.call ([handle, sys.executable]) f.close () /code TJG- Hide quoted text - - Show quoted text - The Notepad process information is fine here. However, with wordpad the results are not much differentiating: -- wordpad.exe pid: 2832 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents -- wordpad.exe pid: 844 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents Both the wordpad applications opened 2 totally different files kept at different locations on the system. So, on the basis of above results one can not say out of these 2 wordpad apps which is the right one that could be closed. The only different thing among the two is the PIDs. -- http://mail.python.org/mailman/listinfo/python-list
Psyco 64 bits
Hi, I used Psyco to speed up my Python code. Due to the great amount of data I have to proccess, I moved my Linux system to a 64 bits version with more RAM. It seems that Psyco cannot be used in such platforms. Or is there another version of Psyco for 64 bits platform? I googled and arrived to PyPy. But I don't know how to use it. With psyco, I used to include two statements roughly at the beginning of the script: import psyco psyco.full() With PyPy, is there a similar way to try to speed up my script? Luis -- http://mail.python.org/mailman/listinfo/python-list
Re: can i write a assemly language programs in python
I wonder if the OP is trying to find out whether python programmes can be compiled and run as stand alone executables. (I know assembly and machine code are not the same, but it might be what they're after.) On windows you can use http://www.py2exe.org/ to bundle python programs into stand alone executables. They're not compiled, but your code and all the modules it relies on are brought together, meaning you can deliver a single exe than can be run like any other windows program. Maybe that helps... 2009/7/9 Gabriel Genellina gagsl-...@yahoo.com.ar: En Thu, 09 Jul 2009 04:17:52 -0300, m.reddy prasad reddy reddy@gmail.com escribió: can any one tell me how to write assembly language programs in python...if no is there any other way to write the programs in python You write Python programs using Python, not assembly. Perhaps if you provide more info on what you want to do, someone can suggest a different way... -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list -- http://www.kiloday.com http://www.fourstopspast.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Check file is locked?
Rajat wrote: The Notepad process information is fine here. However, with wordpad the results are not much differentiating: -- wordpad.exe pid: 2832 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents -- wordpad.exe pid: 844 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents Both the wordpad applications opened 2 totally different files kept at different locations on the system. So, on the basis of above results one can not say out of these 2 wordpad apps which is the right one that could be closed. The only different thing among the two is the PIDs. Rajat: are you trying to find out which app is holding a file open? If so -- run handle.exe *for that filename*, as my code does: handle.exe filename This will only show which apps are holding that file. I suspect you're running handle.exe on its own which will show everything which is holding handles on anything. 1) Use wordpad.exe to open c:\temp\blah.txt 2) Run handle.exe c:\temp\blah.txt 3) Observe (at least on my Win XP Sp3 machine) that *no* process has a handle open on c:\temp\blah.txt, including wordpad, which presumably opens the file, reads it, and closes it again. The items you're seeing above are system-level handles which wordpad is holding for reasons of its own, but none of them is a user filename. TJG -- http://mail.python.org/mailman/listinfo/python-list
Re: Python-list Digest, Vol 70, Issue 123
Hello , When i==0 you append an empty list to arr, so arr[i] is arr[0]. No problem. When i==10 you append another empty list to arr, so arr[i] is arr[10]. Index error because there's no arr[10], only arr[0] and arr[1]. Thanks for your prompt reply... How can i pass this problem Sincerely Tanmoy -- http://mail.python.org/mailman/listinfo/python-list
Re: Python-list Digest, Vol 70, Issue 123
Tanmoy wrote: Hello , When i==0 you append an empty list to arr, so arr[i] is arr[0]. No problem. When i==10 you append another empty list to arr, so arr[i] is arr[10]. Index error because there's no arr[10], only arr[0] and arr[1]. Thanks for your prompt reply... How can i pass this problem You could try appending to arr[-1] instead. Better still: ... row = [] for j in range(0,1001,1): row.append(i+j) arr.append(row) ... -- http://mail.python.org/mailman/listinfo/python-list
Re: IP Address Function
Fred Atkinson fatkin...@mishmash.com (FA) wrote: FA On Wed, 08 Jul 2009 12:29:54 +0200, Piet van Oostrum p...@cs.uu.nl FA wrote: Something like: #! /usr/bin/env python import cgi from os import getenv print Content-type: text/html print ipaddr = (getenv(HTTP_CLIENT_IP) or getenv(HTTP_X_FORWARDED_FOR) or getenv(HTTP_X_FORWARDED_FOR) or getenv(REMOTE_ADDR) or UNKNOWN) print ipaddr FA That did it. FA I wonder why they don't just have a function to return it instead of FA putting you through all of that? I see now that I had getenv(HTTP_X_FORWARDED_FOR) or duplicated. -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
Adrian Dziubek wrote: The recommended Debian way is update-alternatives. I find it a bit unintuitive, so I have to read through the documentation every time I use it, but it should be able link a chosen version of python to /usr/ bin/python. I don't know if it's set up by default, I have only one version installed. -- Adrian what i was asking for is about a way to *INSTALL* and mantain different python versions, a task i think is not unusal for developers. thanks anyway for reply bye -- http://mail.python.org/mailman/listinfo/python-list
Re: Check file is locked?
On Jul 9, 3:21 pm, Tim Golden m...@timgolden.me.uk wrote: Rajat wrote: The Notepad process information is fine here. However, with wordpad the results are not much differentiating: ------ wordpad.exe pid: 2832 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents ------ wordpad.exe pid: 844 COMP\rajatd 1C: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 40: File (RW-) C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common- Controls_6595b64144ccf1df_6.0.2600.5512_x-ww_35d4ce83 74: Section \BaseNamedObjects\ShimSharedMemory F8: Section \BaseNamedObjects \CiceroSharedMemDefaultS-1-5-21-57989841-1580818891-839522115-1653 170: Section \BaseNamedObjects\RotHintTable 184: File (RW-) C:\Documents and Settings\rajatd\My Documents Both the wordpad applications opened 2 totally different files kept at different locations on the system. So, on the basis of above results one can not say out of these 2 wordpad apps which is the right one that could be closed. The only different thing among the two is the PIDs. Rajat: are you trying to find out which app is holding a file open? If so -- run handle.exe *for that filename*, as my code does: handle.exe filename This will only show which apps are holding that file. I suspect you're running handle.exe on its own which will show everything which is holding handles on anything. 1) Use wordpad.exe to open c:\temp\blah.txt 2) Run handle.exe c:\temp\blah.txt 3) Observe (at least on my Win XP Sp3 machine) that *no* process has a handle open on c:\temp\blah.txt, including wordpad, which presumably opens the file, reads it, and closes it again. The items you're seeing above are system-level handles which wordpad is holding for reasons of its own, but none of them is a user filename. TJG- Hide quoted text - - Show quoted text - Thanks Tim for the details. Just further on this, my whole idea is to close the wordpad / notepad application so that I can delete the file and the directory where this file resides. With notepad it is no more a problem. But I'm concerned about the wordpad now. -- http://mail.python.org/mailman/listinfo/python-list
property using a classmethod
Greetings, today I did something like this: class MyClass(object): @classmethod def myClassMethod(self): print ham myProperty = property(myClassMethod, None, None) As many of you know this doesn't work and returns a TypeError: the object passed to the property is not a callable function but a classmethod object, which isn't callable at all. So, how do I do this? Ultimately all I want is a non-callable class-level attribute MyClass.myProperty that gives the result of MyClass.myClassMethod(). Can it be done? Manu -- http://mail.python.org/mailman/listinfo/python-list
Re: count
Paul Rubin: print x, sum(1 for _ in g) Don't use that, use my function :-) If g has a __len__ you are wasting time. And sum(1 ...) is (on my PC) slower. J. Clifford Dyer: if __name__ == '__main__': test_func(summer, 1000) test_func(tupler, 1000) test_func(summer, 1) test_func(tupler, 1) Have you forgotten my function? Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Psyco 64 bits
Luis P. Mendes: It seems that Psyco cannot be used in such platforms. Or is there another version of Psyco for 64 bits platform? I googled and arrived to PyPy. But I don't know how to use it. Psyco will be updated, but probably not for 64 bit CPUs. At the moment PyPy doesn't give you much speed up. So you can try IronPython, but I don't think it will help. There's also the Boo language, that's often fast enough. If your code has few hot spots, then there are many solutions that can be used. For example Cython, Weave, ShedSkin. Or writing external code in C/C++/D/Fortran and interfacing with it with a plethora of means, like ctypes, swig, PIL, Pyd, Boost.Python, Inline, and many other. Running speed is a big problem in many Python programs, so they have invented an army of possible solutions. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
python-ldap
Hi, I need a PYTHON-LDAP package. I'm trying to install ploneldap and it tells me I need python-ldap package first .. but I can't find one to match my versions. I'm using plone 3.2.2, Python 2.4.4 and Zope 2.10.7 on a Win32 environment. Preferable I'd like an EXE as not too familiar with whole plone configuration. The ones I've tried have all told me I need Python 2.4 installed and it can't find in the registry. My plone site tells me I'm python 2.4.4 so maybe I just need to configure some environment variables or PATHs or something prior to running an install ?? Can anyone help me Thanks Larry Please consider the environment before printing this email. Examiner Publications (Cork) Ltd Directors: G. A. Crosbie (Chairman), Thomas J. Murphy (Chief Executive), A.W. Dinan (Secretary), T.P. Crosbie. Registered In Dublin, Ireland. Registered number: 73385. Registered Office: City Quarter, Lapps Quay, Cork. -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
superpollo wrote: Adrian Dziubek wrote: The recommended Debian way is update-alternatives. I find it a bit unintuitive, so I have to read through the documentation every time I use it, but it should be able link a chosen version of python to /usr/ bin/python. I don't know if it's set up by default, I have only one version installed. -- Adrian what i was asking for is about a way to *INSTALL* and mantain different python versions, a task i think is not unusal for developers. thanks anyway for reply bye Installing several minor versions (e.g. 2.3, 2.4, 2.5, 3.0) in parallel has always been supported. Just install them and it should work automagically. However changing the system's default /usr/bin/python is NOT recommended, especially in linux systems that rely heavily on python for many of the system tools. If you install from source, you need to check for some settings to ensure the installer does not install the /usr/bin/python's symlink. If you install from a package manager, they usually doesn't change the symlink and you'll need to run a separate program to change the symlinks (e.g. python-updater in Gentoo, which will also updates all installed python packages to the appropriate version. Neat.). The easiest way to make a specific script use a specific version of python is by changing its hashbang (#!) line: instead of: #!/usr/bin/env python use #!/usr/bin/env python2.3 or whatever version it should run on. AFAIK, no major linux distributions have officially ported to python 3.x. This means switching /usr/bin/python to python3.1 will definitely break your system. As an alternative, you can always explicitly specify the version number of python you want to use: $ python2.5 Python 2.5.4 (r254:67916, Jul 5 2009, 04:12:16) [GCC 4.3.2] on linux2 Type help, copyright, credits or license for more information. exit() $ python2.6 Python 2.6.2 (r262:71600, Jul 5 2009, 04:08:11) [GCC 4.3.2] on linux2 Type help, copyright, credits or license for more information. exit() $ python3.0 Python 3.0.1 (r301:69556, Jul 5 2009, 04:03:20) [GCC 4.3.2] on linux2 Type help, copyright, credits or license for more information. exit() $ python3.0 need3.py happily running with python 3.0 $ python2 need3.py SillyError: not running with python 3.0 -- http://mail.python.org/mailman/listinfo/python-list
Re: Emacs Python-mode. Newbie problem.
Lacrima lacrima.ma...@gmail.com (L) wrote: L Thanks for your reply! L My file name is 'trains.py'. L When I do C-h k C-c RET, it shows me help from manual: C-c RET runs L the command py-execute-import-or-reload Lwhich is an interactive Lisp function in `python-mode'... and so L on. L And still when I do C-c RET, I receive (Shell command succeeded with L no output) L Any more help would be really appreciated, because I am newbie with L Emacs. I tested it and I can get this message also. It happens when you have no Python shell running (*Python* buffer). The python code is then executed by calling the python shell command and catching the output. This output is displayed in the *Python Output* buffer. It happens also with C-c C-c and it will give the same message. There is a difference, however between C-c C-x and C-c RET: The latter will import your module, and most modules are written such that importing them doesn't print anything. If you add something like print test and the end of file, then test will appear in the *Python Output* buffer. If your file has the print hello world statement it should display in the *Python Output* buffer. I checked that. On the other hand, if you have a python shell running you must make sure (e.g. with the cd command) that its working directory is the directory where your python file is located, otherwise the import statement will not find your file. Unless it is somewhere in the python path. Also the *Python* buffer will not automatically pop up if it is not visible, in contrast with the *Python Output* buffer. -- Piet van Oostrum p...@cs.uu.nl URL: http://pietvanoostrum.com [PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Pydev 1.4.7 Released
Yes. On Thu, Jul 9, 2009 at 3:32 AM, Morten Nygaard Aasnesmorten.aas...@gmail.com wrote: On 2009-07-08, Fabio Zadrozny fabi...@gmail.com wrote: Hi All, Pydev and Pydev Extensions 1.4.7 have been released Details on Pydev Extensions: http://www.fabioz.com/pydev Details on Pydev: http://pydev.sf.net Details on its development: http://pydev.blogspot.com Nice! Will this work in Eclipse 3.5 as well? -- Morten Nygaard Åsnes http://twitter.com/mortenaa http://identi.ca/mortenaa -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
Lie Ryan wrote: AFAIK, no major linux distributions have officially ported to python 3.x. http://packages.debian.org/experimental/python3.1 thanks for help -- http://mail.python.org/mailman/listinfo/python-list
Re: PyQt GUI
On Jul 9, 6:27 pm, Helvin helvin...@gmail.com wrote: On Jul 9, 11:29 am, Robert Kern robert.k...@gmail.com wrote: On 2009-07-08 18:10, Helvin wrote: Thanks for the fast replies! I will look into how to use VTK now. Where would I find VTK's explicit support for PyQt? Wrapping/Python/vtk/qt4/ in the VTK sources. Because I have installed VTK (using its installer) and pyVTK (using its setup.py file), but how do I actually use it in my code? According to:http://www.nabble.com/embedded-VTK-window-in-PyQt-application-td23521..., I have tried 'import vtk', but python can't find the vtk module. Then you have not installed VTK's Python bindings correctly. Note that pyVTK is just a library for manipulating VTK files. The VTK Python bindings are part of VTK's distribution itself. Exactly how did you install VTK? Did you compile it yourself? -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco You mean, when I download VTK, the VTK Python bindings come with it? I downloaded VTK from:http://vtk.org/files/release/5.4/ I downloaded pyVTK from:http://pypi.python.org/pypi/PyVTK/0.4.67 And then installed it by the command 'python setup.py install' according to:http://cens.ioc.ee/projects/pyvtk/ I understand that this command runs the file called 'setup.py' that came with the pyVTK download. Thanks so much for your help! I am very desperate now... Helvin I googled: vtk for beginners python. From there, I found this: http://www.nabble.com/pls-help-how-to-install-VTK-and-run-td14977428.html And from there, this: http://www-viz.tamu.edu/courses/viza658/08spring/tutorials/WinVTKInstall.html This last one has very detailed info about how to get started with VTK. I am now redoing the installing VTK thing. Hope it will work. Helvin -- http://mail.python.org/mailman/listinfo/python-list
Re: property using a classmethod
Emanuele D'Arrigo a écrit : Greetings, today I did something like this: class MyClass(object): @classmethod def myClassMethod(self): ot Usually, the first argument of classmethods is named 'cls' /ot print ham myProperty = property(myClassMethod, None, None) As many of you know this doesn't work and returns a TypeError: the object passed to the property is not a callable function but a classmethod object, which isn't callable at all. So, how do I do this? Ultimately all I want is a non-callable class-level attribute MyClass.myProperty properties *are* class attributes. that gives the result of MyClass.myClassMethod(). Can it be done? You could write your own custom descriptor. Or just use an additional level of indirection, ie: myProperty = property(lambda self: self.myClassMethod()) but since you already have myClassMethod available, I don't see the point. What problem are you trying to solve exactly ? -- http://mail.python.org/mailman/listinfo/python-list
Particle research opens door for new technology
Big uses for small particles will be explored at the annual Particle Technology Research Centre Conference at The University of Western Ontario July 9 and 10. for more details on http://0nanotechnology0.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
superpollo wrote: Lie Ryan wrote: AFAIK, no major linux distributions have officially ported to python 3.x. http://packages.debian.org/experimental/python3.1 thanks for help Note the word experimental -- http://mail.python.org/mailman/listinfo/python-list
Re: python-ldap
Larry kavanagh wrote: I need a PYTHON-LDAP package. I'm trying to install ploneldap and it tells me I need python-ldap package first .. but I can't find one to match my versions. I'm using plone 3.2.2, Python 2.4.4 and Zope 2.10.7 on a Win32 environment. Did you check all the links on this page? http://www.python-ldap.org/download.shtml There's a MSI installer for Python 2.4 on Win32: http://pypi.python.org/packages/2.4/p/python-ldap/python-ldap-2.3.8.win32-py2.4.exe#md5=35da547711280c18bd4ccd6e637cdf9b There has been an update of the .egg files recently (also link on the download page above). Ciao, Michael. -- Michael Ströder E-Mail: mich...@stroeder.com http://www.stroeder.com -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: unix to Windows technology
a fried showed me this today: http://xahlee.org/funny/Microsoft_eula.html not sure which site originally reported it. Xah ∑ http://xahlee.org/ ☄ -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
Lie Ryan wrote: superpollo wrote: Lie Ryan wrote: AFAIK, no major linux distributions have officially ported to python 3.x. http://packages.debian.org/experimental/python3.1 thanks for help Note the word experimental i noticed. isn't experimental official? i thought it was... thanks for your reply bye and god bless you -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
superpollo wrote: what i was asking for is about a way to *INSTALL* and mantain different python versions, a task i think is not unusal for developers. Check out virtualenv, I ask myself how I could work without it. http://pypi.python.org/pypi/virtualenv -- http://mail.python.org/mailman/listinfo/python-list
Re: property using a classmethod
Emanuele D'Arrigo wrote: Greetings, today I did something like this: class MyClass(object): @classmethod def myClassMethod(self): print ham myProperty = property(myClassMethod, None, None) As many of you know this doesn't work and returns a TypeError: the object passed to the property is not a callable function but a classmethod object, which isn't callable at all. That code runs fine for me. Although I doubt the behavior is what you wanted to do. So, how do I do this? Ultimately all I want is a non-callable class-level attribute MyClass.myProperty that gives the result of MyClass.myClassMethod(). This works like what you seem to want (it's ugly): class MyClass(object): class _MyClass(object): @classmethod def myClassMethod(cls): return 'ham' @property def myProperty(self): return MyClass._MyClass.myClassMethod() @classmethod def myClassMethod(cls): return MyClass._MyClass.myClassMethod() @property def myProperty(self): return MyClass._MyClass.myClassMethod() def __call__(self, *args, **kargs): # this is __init__ return MyClass._MyClass(*args, **kargs) # note this is NOT a real MyClass instantiation MyClass = MyClass() $ python -i ./strangeclass.py MyClass.myClassMethod() 'ham' MyClass.myProperty 'ham' mc = MyClass() mc.myProperty 'ham' mc.myClassMethod() 'ham' -- http://mail.python.org/mailman/listinfo/python-list
Hello
Hello , When i==0 you append an empty list to arr, so arr[i] is arr[0]. No problem. When i==10 you append another empty list to arr, so arr[i] is arr[10]. Index error because there's no arr[10], only arr[0] and arr[1]. Thanks for your prompt reply... How can i pass this problem You could try appending to arr[-1] instead. Better still: ... row = [] for j in range(0,1001,1): row.append(i+j) arr.append(row) ... I tried both the ways... the only thing is its not coming like 0 10 20...1000 . Its coming like 0,1,2,1000.Any answer to the problem. Thanks Tanmoy Mukherjee -- http://mail.python.org/mailman/listinfo/python-list
Re: function local namespace question
Paul LaFollette wrote: Kind people, Using Python 3.1 under FreeBSD and WinXP. I've been tearing my hair out trying to solve this myself, but I need to ask for help. I want (for obscure reasons) to be able to log transactions in the namespace(s) of a script. Specifically I would like to log creation of identifiers, changes in the binding of identifiers (assignment) and lookups. This turns out to be pretty easy in the global and local namespaces... I simply subclass dict, override the appropriate operations to include the logging operations I want, and then exec the code using my dictionaries as the global and local namespaces. All of this works just dandy until I try to extend it to functions. I cannot figure out any way to get a hook into the local namespace of a user defined function. I have tried making a wrapper class that grabs the function call and then uses exec to invoke myfunction.__code__ with my own dictionaries. This runs the (no argument) function properly (losing the return value, but I can deal with that) but never accesses the local logging dictionary that I specify in the exec() call. Perhaps the local namespace of a function is not a dict at all? Anyway, is there any way (however clumsy) to do what I want to do? Thank you for your help. Paul --- Paul LaFollette CIS Department Temple University paul.lafollette(at)temple.edu www.cis.temple.edu/~lafollet Is there a way? Undoubtedly. The simplest way that occurs to me is to have a pre-pass that rewrites the .pyc files, adding instrumentation to the byte-code. You could also recompile the Python interpreter, with some extra hooks in it. That could get tricky, as you don't want to instrument the code that's doing the tracking. Fnally, you could hook into the byte-code loader, doing the changes at that time. As always, if the code is for commercial use, beware of infringing on patents. I have a few in the 3rd area (though the ownership is with other companies; I was just the inventor.) DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: function local namespace question
Dave Angel wrote: Paul LaFollette wrote: Kind people, Using Python 3.1 under FreeBSD and WinXP. I've been tearing my hair out trying to solve this myself, but I need to ask for help. I want (for obscure reasons) to be able to log transactions in the namespace(s) of a script. Specifically I would like to log creation of identifiers, changes in the binding of identifiers (assignment) and lookups. This turns out to be pretty easy in the global and local namespaces... I simply subclass dict, override the appropriate operations to include the logging operations I want, and then exec the code using my dictionaries as the global and local namespaces. All of this works just dandy until I try to extend it to functions. I cannot figure out any way to get a hook into the local namespace of a user defined function. I have tried making a wrapper class that grabs the function call and then uses exec to invoke myfunction.__code__ with my own dictionaries. This runs the (no argument) function properly (losing the return value, but I can deal with that) but never accesses the local logging dictionary that I specify in the exec() call. Perhaps the local namespace of a function is not a dict at all? Anyway, is there any way (however clumsy) to do what I want to do? You might consider using the trace-functionality of python, exposed throug sys.settrace It's very expensive of course to do that. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: property using a classmethod
Lie Ryan a écrit : Emanuele D'Arrigo wrote: (snip) Ultimately all I want is a non-callable class-level attribute MyClass.myProperty that gives the result of MyClass.myClassMethod(). This works like what you seem to want (it's ugly): Ugly, indeed. And an extreme case of arbitrary overcomplexification too :-/ (snip rube goldberg code) -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
Marco Mariani wrote: superpollo wrote: what i was asking for is about a way to *INSTALL* and mantain different python versions, a task i think is not unusal for developers. Check out virtualenv, I ask myself how I could work without it. http://pypi.python.org/pypi/virtualenv much obliged! -- http://mail.python.org/mailman/listinfo/python-list
Re: Catching control-C
Michael Mossey wrote: On Jul 6, 2:47 pm, Philip Semanchuk phi...@semanchuk.com wrote: On Jul 6, 2009, at 5:37 PM, Michael Mossey wrote: What is required in a python program to make sure it catches a control- c on the command-line? Do some i/o? The OS here is Linux. You can use a try/except to catch a KeyboardInterrupt exception, or you can trap it using the signal module:http://docs.python.org/library/signal.html You want to trap SIGINT. HTH Philip Thanks to both of you. However, my question is also about whether I need to be doing i/o or some similar operation for my program to notice in any shape or form that Control-C has been pressed. In the past, I've written Python programs that go about their business ignoring Ctrl-C. Other programs respond to it immediately by exiting. I think the difference is that the latter programs are doing i/o. But I want to understand better what the secret is to responding to a ctrl-C in any shape or form. For example, does trapping SIGINT always work, regardless of what my process is doing? Thanks, Mike Are you asking: when would the python interpreter process KeyboardInterrupt? In a multi threaded python program (where KeyboardInterrupt doesn't always work), only the main thread can process KeyboardInterrupt; thus the main thread must regain control before the interrupt is raised. Normally, python will context switch (i.e. thread switch) every 100 interpreter ticks, but when the interpreter received a SIGINT, the interpreter will try to context switch as fast as it can (every tick) to allow the main thread to regain control. So the answer is in multithreaded python program: when the main thread regains control In single threaded python program, the currently running thread is always the main thread (which can handle KeyboardInterrupt). I believe SIGINT is checked at every ticks. But SIGINT cannot interrupt atomic operations (i.e. it cannot interrupt long operations that takes a single tick). An example, where python have difficulties processing KeyboardInterrupt: print 'foo'*1000 ...foofoofoo... because printing a string is an atomic operation I believe a tick in python is equivalent to a single bytecode, but please correct me if I'm wrong. -- http://mail.python.org/mailman/listinfo/python-list
Re: Hello
Tanmoy wrote: Hello , When i==0 you append an empty list to arr, so arr[i] is arr[0]. No problem. When i==10 you append another empty list to arr, so arr[i] is arr[10]. Index error because there's no arr[10], only arr[0] and arr[1]. Thanks for your prompt reply... How can i pass this problem You could try appending to arr[-1] instead. Better still: ... row = [] for j in range(0,1001,1): row.append(i+j) arr.append(row) ... I tried both the ways... the only thing is its not coming like 0 10 20...1000 . Its coming like 0,1,2,1000.Any answer to the problem. Each row should be 1 more than the previous row and each column should be 10 more than the previous column. Just swap your ranges. -- http://mail.python.org/mailman/listinfo/python-list
Re: tough-to-explain Python
greg wrote: div class=moz-text-flowed style=font-family: -moz-fixedDave Angel wrote: By the time I graduated, I had five six-level languages ^^^ Are they languages that you have to edit using vi? :-) Back then I didn't need glasses. That was of course intended to be six high-level languages -- http://mail.python.org/mailman/listinfo/python-list
Re: Emacs Python-mode. Newbie problem.
On Jul 9, 2:31 pm, Piet van Oostrum p...@cs.uu.nl wrote: Lacrima lacrima.ma...@gmail.com (L) wrote: L Thanks for your reply! L My file name is 'trains.py'. L When I do C-h k C-c RET, it shows me help from manual: C-c RET runs L the command py-execute-import-or-reload L which is an interactive Lisp function in `python-mode'... and so L on. L And still when I do C-c RET, I receive (Shell command succeeded with L no output) L Any more help would be really appreciated, because I am newbie with L Emacs. I tested it and I can get this message also. It happens when you have no Python shell running (*Python* buffer). The python code is then executed by calling the python shell command and catching the output. This output is displayed in the *Python Output* buffer. It happens also with C-c C-c and it will give the same message. There is a difference, however between C-c C-x and C-c RET: The latter will import your module, and most modules are written such that importing them doesn't print anything. If you add something like print test and the end of file, then test will appear in the *Python Output* buffer. If your file has the print hello world statement it should display in the *Python Output* buffer. I checked that. On the other hand, if you have a python shell running you must make sure (e.g. with the cd command) that its working directory is the directory where your python file is located, otherwise the import statement will not find your file. Unless it is somewhere in the python path. Also the *Python* buffer will not automatically pop up if it is not visible, in contrast with the *Python Output* buffer. -- Piet van Oostrum p...@cs.uu.nl URL:http://pietvanoostrum.com[PGP 8DAE142BE17999C4] Private email: p...@vanoostrum.org Thank you for really useful and detailed explanation. Now I can test my code using Emacs. But I think it works for me in a little bit different way. My file contains only the print 'hello world'. If I have no python shell running, then: a) C-c RET opens *Python Output* buffer without any output and with 'Shell command succeeded with no output' message at the bottom b) C-c C-c opens *Python Output* with appropriate 'hello world' message. Then I run python shell with C-c ! command. And: a) C-c RET opens *Python* buffer and prints 'hello world' in the python shell b) C-c C-c gives the same result. With regards, Max -- http://mail.python.org/mailman/listinfo/python-list
Re: can i write a assemly language programs in python
m.reddy prasad reddy wrote: can any one tell me how to write assembly language programs in python...if no is there any other way to write the programs in python Reddi prasad reddy ph.no:09958083797 Assembly language is a different programming language than Python. You can use both in the same process, much in the same way you can use C or C++ with Python. In fact, some of the system DLL's are written (partly) in assembler, though mostly in C or C++. You'll need to tell us what your real goal is. Are you a python programmer trying to optimize some loop? Are you taking a course in assembler, and hope that somehow Python will help? Do you have Python installed on your system? What system is it? As far as I know, Python has no inline assembler mode, as C does. So anything written in assembler would be in a separate DLL, not mixed in your .py files. It's not hard to mix assembly files with C or C++ files (or Pascal, or dozens of other compiled languages), and link them into a single DLL. But Python's access to that DLL will be done through a module like ctypes, or SWIG. DaveA -- http://mail.python.org/mailman/listinfo/python-list
gett error message: TypeError: 'int' object is not callable
I've seen a lot of posts on this problem, but none seems to help. Here is the code: /code file = open(prefix1) text = file.readlines() len = len(text) fields = text[1].split() num_rows = int(fields[1]) num_cols = int(fields[2]) U1_matrix = [] print fields print repr(fields) print len(fields) for line in text[2: num_rows+2]: fields = line.split() #print fields, fields, line for i in range(len(fields)): fields[i] = float(fields[i]) U1_matrix.append(fields) /*code prefix is a space/line delimited ascii file that represents a 2D matrix. i'm trying to read in 2 matrices from different files, strip away the header stuff and then take the dot product of the 2 matrices. any help is much appreciated. thanks, nick -- http://mail.python.org/mailman/listinfo/python-list
Re: tough-to-explain Python
On Thu, Jul 9, 2009 at 1:05 AM, Simon Formansajmik...@gmail.com wrote: Everyone gets so caught up in programming via languages that you get, well, people trying to teach Computer Programming as if it were only necessary to grok a language, rather than grokking /symbol manipulation/ itself. +1 QOTW. I'm a CS major and this is exactly what I see happening in the intro to CS courses. In class, the Intro to Programming students are showed how to write Java code. Then they try their homework and are completely lost because they were never taught how to think like a programmer so they don't understand how to approach the question. -- http://mail.python.org/mailman/listinfo/python-list
Blocking XMPP API?
Hello everyone, I am looking for blocking XMPP API. I'm wanting to make a webservice that uses XMPP, but all the XMPP libs I find are non-blocking (i.e. w/ callbacks). I'd like to be able to do something like : cl = Client(t...@domain.com/res01, password,) msg = m. result = cl.send(msg) print I got '%s' % str(result) any ideas? Using Java I have Smack which can either get msgs sync or async, but I found nothing that can do this in Python. Thanks, Gabriel -- Arimaz SA Ingénieur en Informatique Av. du 24 Janvier 11 Ateliers de la Ville de Renens, Atelier 5 1020 Renens, Switzerland www.arimaz.com www.mydeskfriend.com Mob: +41-(0)79-539-0069 Tel: +41-(0)21-566-7343 -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Hi, Nick schrieb: I've seen a lot of posts on this problem, but none seems to help. Could you please post a sample input file and the exact error message? Thanks Lutz -- Strike Out ⇒ http://www.fourmilab.ch/documents/strikeout -- http://mail.python.org/mailman/listinfo/python-list
Re: older pythons
On Thu, Jul 9, 2009 at 8:10 AM, Lie Ryanlie.1...@gmail.com wrote: superpollo wrote: Lie Ryan wrote: AFAIK, no major linux distributions have officially ported to python 3.x. http://packages.debian.org/experimental/python3.1 thanks for help Note the word experimental Assuming that Debian does the same thing as Ubuntu (which is highly likely), Python3.1 won't install itself as the default. Too many system features depend on Python 2.x. -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Look at: len = len(text) You're overriding `len` (a built-in method), with an integer (`len(text)`). You then call: for i in range(len(fields)): But `len` is no longer a callable, but merely an integer. Regards, Friðrik Már P.S. While this is a fairly obvious problem it's usually a good idea to post working code and a traceback when requesting help. -- http://mail.python.org/mailman/listinfo/python-list
Re: Check file is locked?
En Thu, 09 Jul 2009 07:53:29 -0300, Rajat rajat.dud...@gmail.com escribió: Thanks Tim for the details. Just further on this, my whole idea is to close the wordpad / notepad application so that I can delete the file and the directory where this file resides. With notepad it is no more a problem. But I'm concerned about the wordpad now. I don't see Wordpad keeping the file open either. If you can't remove the file, use handle.exe filename.txt to discover which process is holding it open, as Tim already explained. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Hello
You could pick a much better title. And apparently you started a new thread with this one. When responding to an existing message, you ought to reply-all to the existing message, rather than starting a new thread. Tanmoy wrote: Hello , When i==0 you append an empty list to arr, so arr[i] is arr[0]. No problem. When i==10 you append another empty list to arr, so arr[i] is arr[10]. Index error because there's no arr[10], only arr[0] and arr[1]. Thanks for your prompt reply... How can i pass this problem You could try appending to arr[-1] instead. Better still: ... row = [] for j in range(0,1001,1): row.append(i+j) arr.append(row) ... I tried both the ways... the only thing is its not coming like 0 10 20...1000 . Its coming like 0,1,2,1000.Any answer to the problem. Thanks Tanmoy Mukherjee If you want the row to count by 10's you have to build it that way. You have the arguments to the ranges backwards. Try: arr=[] for i in range(1001): row = [] for j in range(0,1010,10): row.append(i+j) arr.append(row) Coincidentally, once you reverse them, the original problem would go away. But this is better anyway, as it makes it clear what's happening. You are building 1001 rows, each containing non-contiguous numbers. DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Nick nleio...@gmail.com wrote in message news:e54c4461-c0b7-42fb-8542-cefd7bf5f...@h18g2000yqj.googlegroups.com... file = open(prefix1) text = file.readlines() len = len(text) You have redefined two built-in functions file and len in the first three lines. This is usually considered poor practice. Stick to meaningless variable names, it's safer (only joking). TypeError: 'int' object is not callable. This means that something you thought was a function is in fact an integer. It's helpful to post/look at the line number of the error; how is this line failing, is much easier to answer than how is my program failing. print len(fields) Here len is an integer, because you redefined it in line 3. I'm guessing this is the problem. -- http://mail.python.org/mailman/listinfo/python-list
Re: a little wsgi framework
On Jul 7, 5:19 am, Bruno Desthuilliers bruno.
42.desthuilli...@websiteburo.invalid wrote:
timmyt a écrit :
i'm interested in getting opinions on a smallwsgiframework i
assembled from webob, sqlalchemy, genshi, and various code fragments i
found on the inter-tubes
here is the interesting glue - any comments / suggestions would be
much appreciated
meta
Well... My first comment would be about the usefulness of yet another
Python web framework, but let's not worry about this...
/meta
--
thewsgiapp
--
def application(environ, start_response):
path = environ.get('PATH_INFO', '').lstrip('/')
for regex, callback in urls:
match = re.search(regex, path)
I don't know where these urls come from. But anyway : if they live in
some sort of long-running process, you may want to precompile them.
if match:
environ['myapp.url_args'] = match.groups()
request = webob.Request(environ)
try:
return callback(request, start_response)
except Exception, ex:
How are redirect etc handled ?
start_response('500 Internal Server Error', [('Content-
Type', 'text/plain')])
return [traceback.format_exc()]
A configuration option controlling the display of the traceback would be
fine - I surely don't want the traceback being displayed to anyone when
the app goes into production.
Also, logging the error and traceback might be useful.
start_response('404 Not Found', [('Content-Type', 'text/plain')])
return [Couldn't find the URL specified.]
And in both cases, having the ability to use custom 500 and 404 pages
might be nice too.
--
the controller decorator
--
def web_decorator(filename, method='html'):
def decorator(target):
May I suggest some renaming here ?
filename = path (or 'template_path' ?)
method = content_type
target = controller or function or callback or
def wrapper(request, start_response):
#genshi TemplateLoader
template = loader.load(filename)
global config
Probably not thread-safe
try:
return_dict = target(request, start_response)
return_string = template.generate(**return_dict).render
(method)
Renaming again:
return_dict = context
return_string = data or text or ???
config['database.Session'].commit()
except:
config['database.Session'].rollback()
raise
finally:
config['database.Session'].remove()
This doesn't leave much control on transactions... Sometimes you want to
handle it manually one way or another.
#TODO: alter 'Content-Type' per method being passed
start_response('200 OK', [('Content-Type', 'text/html')])
return [return_string]
Ok, so here again, I don't understand how redirects can work. Also, if
you do use start_response here, I don't get why you still pass it to the
callback function.
return wrapper
return decorator
slightly OT, but preserving infos on the decorated function might help
too (introspection, debugging etc).
My 2 cents...
thank you gentlemen
i'm now looking for Redirect exceptions as well, and returning the
appropriate response code (stole this idea from turbogears)
i like doing the response codes and exceptions myself which is why i'm
not using the webob response - i think it's more explicit and
straightforward
the conditional display of errors goes without say - that will be
trivial to add
the 'global config' line was an error - config is a module level
variable set before the application definition
i assume as long as i don't write to the config variable within the
application it is thread-safe - is that correct
the underlying assumption is the wsgi application setup does not have
to be thread safe - this is only run once per process
--
http://mail.python.org/mailman/listinfo/python-list
Problem with two instances of PySerial
Hello friends,I am developing an application to read data from serial port and display it on the screen using GUI developed in pyQT. For this I have instantiated the GUI as well as pySerial objects in the main thread. I have provided a button 'Read' which when clicked by the user reads from the serial port using read() method of pySerial. However, for debugging purposes I also want to poll the serial port continuously for arrival of data and display on screen. I achieve this by creating a separate worker thread to poll the serial port for arrival of data and then updating the required widget in main thread of program. For polling the serial port, I create a separate instance of pySerial object. However, I am unable to read any data in the worker thread. Can the reason for this be 2 instances of pySerial objects being connected to serial port. The reason I had this doubt was because Serial.Connect() in the worker thread did not throw any exception isOpen() method returns true. I request you to help me in figuring out the problem. -- Regards, Shine Jose -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
On Jul 9, 10:02 am, Richard Brodie r.bro...@rl.ac.uk wrote: Nick nleio...@gmail.com wrote in message news:e54c4461-c0b7-42fb-8542-cefd7bf5f...@h18g2000yqj.googlegroups.com... file = open(prefix1) text = file.readlines() len = len(text) You have redefined two built-in functions file and len in the first three lines. This is usually considered poor practice. Stick to meaningless variable names, it's safer (only joking). TypeError: 'int' object is not callable. This means that something you thought was a function is in fact an integer. It's helpful to post/look at the line number of the error; how is this line failing, is much easier to answer than how is my program failing. print len(fields) Here len is an integer, because you redefined it in line 3. I'm guessing this is the problem. thanks for spotting the obvious errors, its my 2nd day programming python in about 3 years. fridrick, code should be workable with the exception of the errors...thats the whole program Thanks again for all the help problem fixed -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Nick a écrit : I've seen a lot of posts on this problem, but none seems to help. Here is the code: /code file = open(prefix1) shadows the builtin 'file' type. text = file.readlines() len = len(text) shadows the builtin 'len' function. fields = text[1].split() num_rows = int(fields[1]) num_cols = int(fields[2]) U1_matrix = [] print fields print repr(fields) print len(fields) And here's your problem - 'len' is now bound to the result of the previous call to len(text). Hint : Python's functions, classes and modules are objects too, and don't live in a distinct namespace. So _don't_ use builtin's types / functions / etc names as identifiers. HTH -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Nick wrote: I've seen a lot of posts on this problem, but none seems to help. Here is the code: /code file = open(prefix1) text = file.readlines() len = len(text) fields = text[1].split() num_rows = int(fields[1]) num_cols = int(fields[2]) U1_matrix = [] print fields print repr(fields) print len(fields) for line in text[2: num_rows+2]: fields = line.split() #print fields, fields, line for i in range(len(fields)): fields[i] = float(fields[i]) U1_matrix.append(fields) /*code prefix is a space/line delimited ascii file that represents a 2D matrix. i'm trying to read in 2 matrices from different files, strip away the header stuff and then take the dot product of the 2 matrices. any help is much appreciated. thanks, nick You have at least two problems with that code, one of which is causing your symptom. Both 'file' and 'len' are defined in the standard library, and shouldn't be redefined in your code. And your problem is that after you redefined 'len', you then tried to use it in its original meaning. Rename those two and you'll get further. And it would have saved lots of time for lots of people if you included sample data and the actual error message, marking where in your code it occurs. Once you know it's complaining about the len() call, it's not too hard to figure out that the problem was you rebound the len attribute from a function to an integer. Traceback (most recent call last): File M:\Programming\Python\sources\dummy\echo2.py, line 21, in module print len(fields) TypeError: 'int' object is not callable DaveA -- http://mail.python.org/mailman/listinfo/python-list
Re: count
Bearophile wins! (This only times the loop itself. It doesn't check for __len__) summer:5 0:00:00.51 bearophile:5 0:00:00.09 summer:50 0:00:00.30 bearophile:50 0:00:00.13 summer:500 0:00:00.77 bearophile:500 0:00:00.53 summer:5000 0:00:00.000575 bearophile:5000 0:00:00.000473 summer:5 0:00:00.005583 bearophile:5 0:00:00.004625 summer:50 0:00:00.055834 bearophile:50 0:00:00.046137 summer:500 0:00:00.426734 bearophile:500 0:00:00.349573 summer:5000 0:00:04.180920 bearophile:5000 0:00:03.652311 summer:5 0:00:42.647885 bearophile: 5 0:00:35.190550 On Thu, 2009-07-09 at 04:04 -0700, Bearophile wrote: Paul Rubin: print x, sum(1 for _ in g) Don't use that, use my function :-) If g has a __len__ you are wasting time. And sum(1 ...) is (on my PC) slower. J. Clifford Dyer: if __name__ == '__main__': test_func(summer, 1000) test_func(tupler, 1000) test_func(summer, 1) test_func(tupler, 1) Have you forgotten my function? Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Previously, I wrote: P.S. While this is a fairly obvious problem it's usually a good idea to post working code and a traceback when requesting help. Nick wrote: thanks for spotting the obvious errors, its my 2nd day programming python in about 3 years. I'm sorry, my saying it was obvious may have come off a little arrogant. My clumsily delivered point was that because it was a small snippet of code it didn't take much time to run through for someone who codes daily with Python. What you did there was a perfectly ordinary thing to do until experience teaches you how Python does things. :) fridrick, code should be workable with the exception of the errors...thats the whole program You're right, I failed to say it explicitely but I was referring to the input file. In some cases, albeit not this one, problems can exist in parsing gotchas. Regards, Friðrik Már -- http://mail.python.org/mailman/listinfo/python-list
Re: PyQt GUI
On 2009-07-09 01:27, Helvin wrote: On Jul 9, 11:29 am, Robert Kernrobert.k...@gmail.com wrote: On 2009-07-08 18:10, Helvin wrote: Thanks for the fast replies! I will look into how to use VTK now. Where would I find VTK's explicit support for PyQt? Wrapping/Python/vtk/qt4/ in the VTK sources. Because I have installed VTK (using its installer) and pyVTK (using its setup.py file), but how do I actually use it in my code? According to:http://www.nabble.com/embedded-VTK-window-in-PyQt-application-td23521..., I have tried 'import vtk', but python can't find the vtk module. Then you have not installed VTK's Python bindings correctly. Note that pyVTK is just a library for manipulating VTK files. The VTK Python bindings are part of VTK's distribution itself. Exactly how did you install VTK? Did you compile it yourself? You mean, when I download VTK, the VTK Python bindings come with it? I downloaded VTK from:http://vtk.org/files/release/5.4/ Exactly which file did you download? I don't think the vtk-5.4.x-win32.exe installers have the Python bindings. You will need to build VTK from sources. -- Robert Kern I have come to believe that the whole world is an enigma, a harmless enigma that is made terrible by our own mad attempt to interpret it as though it had an underlying truth. -- Umberto Eco -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
no problem, i understand, i haven't coded anything in literally 2 years, but it was a simple and pretty obvious mistake. thanks for all your help, nick On Jul 9, 11:30 am, Friðrik Már Jónsson frid...@pyth.net wrote: Previously, I wrote: P.S. While this is a fairly obvious problem it's usually a good idea to post working code and a traceback when requesting help. Nick wrote: thanks for spotting the obvious errors, its my 2nd day programming python in about 3 years. I'm sorry, my saying it was obvious may have come off a little arrogant. My clumsily delivered point was that because it was a small snippet of code it didn't take much time to run through for someone who codes daily with Python. What you did there was a perfectly ordinary thing to do until experience teaches you how Python does things. :) fridrick, code should be workable with the exception of the errors...thats the whole program You're right, I failed to say it explicitely but I was referring to the input file. In some cases, albeit not this one, problems can exist in parsing gotchas. Regards, Friðrik Már -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Hi, Do you know a good way to avoid running into this problem? It makes sense to suggest not calling variables the same names as built-in functions, but that's hard for a new python programmer who doesn't already know what all the built-in functions are. Over time a programmer will learn which names to avoid, but it's a bit of a pitfall early on. Cheers, Tom 2009/7/9 Richard Brodie r.bro...@rl.ac.uk: Nick nleio...@gmail.com wrote in message news:e54c4461-c0b7-42fb-8542-cefd7bf5f...@h18g2000yqj.googlegroups.com... file = open(prefix1) text = file.readlines() len = len(text) You have redefined two built-in functions file and len in the first three lines. This is usually considered poor practice. Stick to meaningless variable names, it's safer (only joking). TypeError: 'int' object is not callable. This means that something you thought was a function is in fact an integer. It's helpful to post/look at the line number of the error; how is this line failing, is much easier to answer than how is my program failing. print len(fields) Here len is an integer, because you redefined it in line 3. I'm guessing this is the problem. -- http://mail.python.org/mailman/listinfo/python-list -- http://www.kiloday.com http://www.fourstopspast.com -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter problem
Peter Otten __pete...@web.de wrote in message news:h3481q$d95$0...@news.t-online.com... Paul Simon wrote: Chris Rebert c...@rebertia.com wrote in message news:mailman.2863.1247095339.8015.python-l...@python.org... On Wed, Jul 8, 2009 at 4:18 PM, Paul Simonpsi...@sonic.net wrote: I have the tkinter problem and need some assistance to straighten it out. From the web page http://wiki.python.org/moin/TkInter; I tested as in step 1 and cannot import _tkinter. I do not have that file on my computer, but do have tkinter.py in /usr/local/lib/python2.6/lib-tk. as well as the directories /usr/lib/tk8.5 and /usr/lib/tcl8.5. This python stuff is great, but the documentation frequently feels like it is just a bit out of my grasp. I realize that all of this is free but I understand the instructions on the web page to repair only to the point of confusion. I'm not an expert. How do I modify my python configuration? Is there a file that needs to be edited? Which setup.py file do I use? Make? or python setup.py build and python setup.py install? Thanks. I appreciate your help. - How did you install Python? - What Linux distro are you using? Cheers, Chris http://blog.rebertia.com Im using Mandriva 2008.1. I have to tell you honestly that I'm not sure exactly how I installed Python. Originally I had installed 2.5 from RPM but 2.6 was not available for my distro (2008.1) in RPM. I downloaded something from python.org and installed. Not sure if it was tarball or zip file. Zip or tar doesn't matter, you are installing from source. Python has to find the necessary include files for tcl/tk. These are in separate packages that you have to install before you invoke Python's configure script. I don't know what they are called on your system -- look for tk-dev.rpm, tcl-dev.rpm or similar. You may run into the same problem with other modules like readline. Peter Thank you Peter. I understand what you are saying but don't know how to do it. Although I installed from source, I followed a cookbook recipe. Could you tell me what files to execute, where they might be, and file arguments? I'm just ignorant, not stupid. ;-). Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Tom Kermode tkerm...@gmail.com wrote in message news:mailman.2903.1247155607.8015.python-l...@python.org... Do you know a good way to avoid running into this problem? It makes sense to suggest not calling variables the same names as built-in functions, but that's hard for a new python programmer who doesn't already know what all the built-in functions are. No, but not redefining the ones you actually use is a good start. Learning to understand the traceback is the more important lesson, IMHO. It takes a while to tune into what error messages are trying to tell you; even when you stop making newbie mistakes, you're going to have to deal with runtime errors from time to time. -- http://mail.python.org/mailman/listinfo/python-list
send keys to focused window
Hi, I am new to Python, and I'm miserably failing to send specific keys to (say) notepad. Here is the scenario: I have notepad open. My python script is running in the background. When I press ALT+a I want to intercept the keys and send ä(ASCII code: ALT+0228) instead. OS: Windows 7 Libraries used: pyHook, SendKeys, pyWin32 Here is my code: ### # -*- coding: cp1252 -*- import pythoncom, pyHook from SendKeys import SendKeys def OnKeyboardEvent(event): if event.Alt == 32: #alt pressed if event.Ascii == 97: #a pressed SendKeys(ä) return False #don't pass to other handlers # return True to pass the event to other handlers return True # create a hook manager hm = pyHook.HookManager() # watch for all mouse events hm.KeyDown = OnKeyboardEvent # set the hook hm.HookKeyboard() # wait forever pythoncom.PumpMessages() ### It's largely copied from the pyhook example. My problem is, I need to somehow disable ALT while sonding the key. Please help :) -- http://mail.python.org/mailman/listinfo/python-list
Running a script to build docs from setup.py
I want to write a setup.py script, using distutils, for a python library called ROX-Lib2 (package name rox). The library includes a script to build HTML documentation from the pydoc strings. I'd like to run that script from setup.py but I don't know the best way to do that. I've looked through the manual but I can't find any hooks in distutils for generating files at install time other than extension modules and .pyc files. Should I just run the script from somewhere in my setup.py before calling distutils' setup function? -- TH * http://www.realh.co.uk -- http://mail.python.org/mailman/listinfo/python-list
Re: gett error message: TypeError: 'int' object is not callable
Tom Kermode wrote: Do you know a good way to avoid running into this problem? It makes sense to suggest not calling variables the same names as built-in functions, but that's hard for a new python programmer who doesn't already know what all the built-in functions are. One way is using a code checker like PyChecker[1]. This neat software for finding bugs will check for lots of other pitfalls too, but you can filter it down to what you need if you're only interested in this one. I don't use an IDE, but this would seem like something for an IDE[2] to support if you're into that kind of magic. Regards, Friðrik Már [1] http://pychecker.sourceforge.net/ [2] http://wiki.python.org/moin/IntegratedDevelopmentEnvironments -- http://mail.python.org/mailman/listinfo/python-list
Re: tkinter problem
Paul Simon wrote: Peter Otten __pete...@web.de wrote in message news:h3481q$d95$0...@news.t-online.com... Paul Simon wrote: Chris Rebert c...@rebertia.com wrote in message news:mailman.2863.1247095339.8015.python-l...@python.org... On Wed, Jul 8, 2009 at 4:18 PM, Paul Simonpsi...@sonic.net wrote: I have the tkinter problem and need some assistance to straighten it out. From the web page http://wiki.python.org/moin/TkInter; I tested as in step 1 and cannot import _tkinter. I do not have that file on my computer, but do have tkinter.py in /usr/local/lib/python2.6/lib-tk. as well as the directories /usr/lib/tk8.5 and /usr/lib/tcl8.5. This python stuff is great, but the documentation frequently feels like it is just a bit out of my grasp. I realize that all of this is free but I understand the instructions on the web page to repair only to the point of confusion. I'm not an expert. How do I modify my python configuration? Is there a file that needs to be edited? Which setup.py file do I use? Make? or python setup.py build and python setup.py install? Thanks. I appreciate your help. - How did you install Python? - What Linux distro are you using? Cheers, Chris http://blog.rebertia.com Im using Mandriva 2008.1. I have to tell you honestly that I'm not sure exactly how I installed Python. Originally I had installed 2.5 from RPM but 2.6 was not available for my distro (2008.1) in RPM. I downloaded something from python.org and installed. Not sure if it was tarball or zip file. Zip or tar doesn't matter, you are installing from source. Python has to find the necessary include files for tcl/tk. These are in separate packages that you have to install before you invoke Python's configure script. I don't know what they are called on your system -- look for tk-dev.rpm, tcl-dev.rpm or similar. You may run into the same problem with other modules like readline. Peter Thank you Peter. I understand what you are saying but don't know how to do it. Although I installed from source, I followed a cookbook recipe. Could you tell me what files to execute, where they might be, and file arguments? I'm just ignorant, not stupid. ;-). Paul Once you have the necessary development packages for tcl/tk just go into the directory where you unzipped the source and ./configure make sudo make altinstall Unfortunately I don't know the names of these packages nor how to install them, and Google didn't turn up anything useful. If you don't get any additional answers here you may try a Mandriva forum since this is not a question that requires python knowlegde. Peter -- http://mail.python.org/mailman/listinfo/python-list
Examples of Python driven Microsoft UI Automation wanted
Hi, I am embarking on teaching myself Microsoft UI Automation using Python as the scripting language. I have asked some questions in the IronPython users group, but have yet to get a response, so I thought I would broaden the audience by asking here. Specifically, I have a WinForms application I will be wanting to automate. Does anyone have some Python examples of driving Microsoft UI Automation they could share with me to get me started? The structure of the UI automation classes etc. seem quite convoluted, and I am having difficulty getting my brain wrapped around it. Alternatives to Microsoft's UI Automation are welcome too, but I have tried using winguiauto and watsup (along with AutoIt), and there seems to be severe limitations when using these tools with WinForm applications. Thanks in advance, Duane -- http://mail.python.org/mailman/listinfo/python-list
Re: Opening a SQLite database in readonly mode
Joshua Kugler wrote: Sorry about that...since pysqlite and APSW are both discusses on the pysqlite list, I had made an incorrect assumption. Oops. are both discusses? Yeef, I must have been out of it. Discussed, thank you. :) j -- http://mail.python.org/mailman/listinfo/python-list
Re: tough-to-explain Python
On Wed, 08 Jul 2009 22:05:57 -0700, Simon Forman wrote: The core abstractions of [mechanical] computation are just not that complicated. You can teach them to anybody in about a half an hour, drunk. I have. That's *easy*. Anyone can teach the most complicated and abstract principles of any topic at all drunk. What's hard is doing it sober. http://stackoverflow.com/questions/63668/confessions-of-your-worst-wtf- moment-what-not-to-do/350267#350267 or http://tinyurl.com/lur784 You'll excuse my skepticism about all these claims about how anyone can program, how easy it is to teach the fundamentals of Turing Machines and functional programming to anybody at all. Prove it. Where are your peer- reviewed studies demonstrating such successes on randomly chosen people, not self-selected motivated, higher-than-average intelligence students? In the real world, human beings are prone to serious cognitive biases and errors. Our brains are buggy. Take any list of reasoning fallacies, and you'll find the majority of people have difficulty avoid them. The first struggle is to get them to even accept that they *are* fallacies, but even once they have intellectually accepted it, getting them to live up to that knowledge in practice is much, much harder. In fact I'd go further and say that *every single person*, no matter how intelligent and well-educated, will fall for cognitive biases and fallacious reasoning on a regular basis. http://en.wikipedia.org/wiki/Cognitive_bias http://en.wikipedia.org/wiki/Fallacy -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: Examples of Python driven Microsoft UI Automation wanted
On 2009-07-09, TheSeeker duane.kauf...@gmail.com wrote: Specifically, I have a WinForms application I will be wanting to automate. Does anyone have some Python examples of driving Microsoft UI Automation they could share with me to get me started? The structure of the UI automation classes etc. seem quite convoluted, and I am having difficulty getting my brain wrapped around it. If you find a way to work through the UI using the keyboard (tabs, etc); then, you can send it keyboard commands using WScript.WshShell.SendKeys(): http://msdn.microsoft.com/en-us/library/8c6yea83(VS.85).aspx -- http://mail.python.org/mailman/listinfo/python-list
Re: Cleaning up after failing to contructing objects
brasse wrote:
Hello!
I have been thinking about how write exception safe constructors in
Python. By exception safe I mean a constructor that does not leak
resources when an exception is raised within it. The following is an
example of one possible way to do it:
First, your automatic cleaning Bar() silently pass an unitialized Bar()
into the calling code. When a code fails, it should fail as loud as
possible. Bar() should raises an Exception and the calling code should
turn into something like:
try:
bar = Bar()
except Exception, e:
print 'bar failed to construct'
And about the cleaning up, how about:
class CleanWrap(object):
def __init__(self, cls, cleanup):
self.cls = cls
self.cleanup = cleanup
def __call__(self, *args, **kargs):
try:
return self.cls(*args, **kargs)
except:
self.cleanup()
raise
class Bar(object):
def __init__(self):
CleanWrappedFoo = CleanWrap(Foo, self.close)
self.a = CleanWrappedFoo('a')
self.b = CleanWrappedFoo('b', fail=True)
def close(self):
if hasattr(self, 'a'):
self.a.close()
if hasattr(self, 'b'):
self.b.close()
try:
bar = Bar()
except Exception, e:
print 'Bar() failed to construct'
==
My next attempt is pretty neat, using a totally different approach, see
the docstring for details:
class Foo1(object):
def __init__(self, name, fail=False):
self.name = name
cls_name = self.__class__.__name__
if not fail:
print '%s.__init__(%s)' % (cls_name, self.name)
else:
print '%s.__init__(%s), FAIL' % (cls_name, self.name)
raise Exception()
def close(self):
print '%s.close(%s)' % (self.__class__.__name__, self.name)
class Foo2(object):
def __init__(self, name, fail=False):
self.name = name
cls_name = self.__class__.__name__
if not fail:
print '%s.__init__(%s)' % (cls_name, self.name)
else:
print '%s.__init__(%s), FAIL' % (cls_name, self.name)
raise Exception()
def close(self):
print '%s.close(%s)' % (self.__class__.__name__, self.name)
class CleanList(object):
''' Each CleanList() instance is rigged so that if exceptions happen
in the same CleanList() instance's wrapped class, all objects
created from the wrapped classes in the same CleanList()
instance will be cleaned (see Usage for much better
explanation).
Usage:
cleaner = CleanList()
othercleaner = CleanList()
F = cleaner(F, F.close)
G = cleaner(G, G.close)
H = othercleaner(H, H.close)
a = F()
b = F()
c = G()
d = H()
cleaner.cleanall()
cleaner.cleanall() will clean a, b, and c but not d
exceptions in (F|G|H).__init__ will trigger
cleaner.cleanall()
Can be subclassed if you want to override the conditions
that determines the triggering of cleanups
'''
def wrap(self, cls):
''' Wrapper factory that customizes Wrapper's subclass
'''
class Wrapper(cls):
''' Wraps the class' __init__ with cleanup guard.
Subclasses cls to simulate cls as close as possible
'''
# change __class__ to make printing prettier
# e.g. Foo1.__init__ instead of Wrapper.__init__
# probably should be removed
# I'm not sure of the side effects of changing __class__
__class__ = cls
def __init__(self_in, *args, **kargs):
try:
sup = super(Wrapper, self_in)
ret = sup.__init__(*args, **kargs)
except:
self.cleanall()
raise
else:
self.add_to_list(cls, self_in)
return ret
return Wrapper
def __init__(self):
self.cleaners = {}
def __call__(self, cls, cleanup):
''' wraps the class constructor '''
# cleanup, []:
# cleanup is the function called to clean
# [] is the object list for that `cleanup` function
# may not be the best data structure, but it works...
self.cleaners[cls] = cleanup, []
return self.wrap(cls)
def cleanall(self):
''' clean all objects '''
for cleaner, insts in self.cleaners.values():
for inst in insts:
cleaner(inst)
def add_to_list(self, cls, inst):
''' add objects to the cleanup list '''
self.cleaners[cls][1].append(inst)
class Bar(object):
def __init__(self):
clist = CleanList()
otherclist = CleanList()
CleanFoo1 = clist(Foo1, Foo1.close)
CleanFoo2 = clist(Foo2, Foo2.close)
OtherCleanFoo1 = otherclist(Foo1, Foo1.close)
self.a =
Concatenating images (numpy arrays), but they look like HSV images
Hello everybody, I want to concatenate 2 numpy array which in fact are RGB images: def concat_images(im1,im2): rows1 = im1.shape[0] rows2 = im2.shape[0] if rows1 rows2: im1 = concatenate((im1,zeros((rows2-rows1,im1.shape[1],3), int)), axis=0) elif rows1 rows2: im2 = concatenate((im2,zeros((rows1-rows2,im2.shape[1],3), int)), axis=0) return concatenate((im1,im2), axis=1) It's all working fine, except that the images when showing with pylab are somewhat interpreted as HSV images as it looks. The function zeros() must be responsible for that circumstance, because when the arrays have the same shape and are concatenated they appear as horizontally concatenated images as I expected. Can someone help me with that? Thanks a lot, Basti -- http://mail.python.org/mailman/listinfo/python-list
Re: property using a classmethod
Emanuele D'Arrigo wrote: class MyClass(object): @classmethod def myClassMethod(self): print ham myProperty = property(myClassMethod, None, None) ... doesn't work and returns a TypeError: So, how do I do this? Ultimately all I want is a non-callable class-level attribute MyClass.myProperty that gives the result of MyClass.myClassMethod(). properties affect instances, and classes are instances of types. What you want is a new metaclass: class MyType(type): @property def demo(class_): return class_.a + 3 class MyClass(object): __metaclass__ = MyType a = 5 print MyClass.a, MyClass.demo --Scott David Daniels scott.dani...@acm.org -- http://mail.python.org/mailman/listinfo/python-list
Re: property using a classmethod
Bruno Desthuilliers wrote: Lie Ryan a écrit : Emanuele D'Arrigo wrote: (snip) Ultimately all I want is a non-callable class-level attribute MyClass.myProperty that gives the result of MyClass.myClassMethod(). This works like what you seem to want (it's ugly): Ugly, indeed. And an extreme case of arbitrary overcomplexification too :-/ (snip rube goldberg code) Can't think of anything simpler than that without meddling with descriptor. I'm not even sure descriptor can help here as it seems descriptor needs an instance? (I've just skimmed it, so I may be wrong) The ugliness of the code hints to two possible reasons: - there should be a better way - if there isn't an easier way, then something is wrong the class' design -- http://mail.python.org/mailman/listinfo/python-list
Re: Examples of Python driven Microsoft UI Automation wanted
On Jul 9, 12:18 pm, Tim Harig user...@ilthio.net wrote: On 2009-07-09, TheSeeker duane.kauf...@gmail.com wrote: Specifically, I have a WinForms application I will be wanting to automate. Does anyone have some Python examples of driving Microsoft UI Automation they could share with me to get me started? The structure of the UI automation classes etc. seem quite convoluted, and I am having difficulty getting my brain wrapped around it. If you find a way to work through the UI using the keyboard (tabs, etc); then, you can send it keyboard commands using WScript.WshShell.SendKeys(): http://msdn.microsoft.com/en-us/library/8c6yea83(VS.85).aspx Thanks for the link. Unfortunately, I need to be able to find out the contents of a few text-boxes as well, so SendKeys isn't all I need. Thanks again, Duane -- http://mail.python.org/mailman/listinfo/python-list
