PyCon: Two weeks left for early-bird registration
Early bird registration for PyCon ends on December 31st, so there's now slightly less than two weeks left. To register, go to: http://us.pycon.org/TX2006/Registration You can still register after Dec. 31st, but the cost will go up by US$65 (US$25 for students). Course outlines have now been posted for all the tutorials; see http://wiki.python.org/moin/PyCon2006/Tutorials All of the PyCon tutorials are still open for new registrations, but space is limited, and I suspect they'll all be filled up by the time early-bird registration closes. Don't forget to book your hotel room, too: http://us.pycon.org/Addison/Hotels A.M. Kuchling Chair, PyCon 2006 [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: Which Python web framework is most like Ruby on Rails?
Kent Johnson wrote: Luis M. Gonzalez wrote: I don't think Pierre (Karrigell's creator) is awared of licenses and legal issues. Perhaps you can tell us what's the problem with GPL and, if possible, propose an alternative... OK I'll try. First let me say I have no interest in a licensing flame war, there are valid reasons why an author might prefer one license over another and certainly there are good reasons to choose GPL. However the work I do is commercial and proprietary and I doubt I could get approval to release it under GPL. So I am restricted to projects with more liberal licenses such as MIT, BSD and Apache licenses. These allow closed-source distribution of products based on them. I see the GPL is a problem in this environment, and you are clearly aware of the issues it raises. Do be aware, though, that not all GPL authors are rabid communists, and some will consider licensing to you under other licenses if you ask them. It's always worth asking, as some authors have chosen GPL in a somewhat uninformed way rather than as a political statement (you'll notice I too am trying to avoid the flame wars). Certainly it is within an author's rights to prohibit use of his code in closed source products, as the author of Karrigell has done by choosing GPL and I respect this decision. Unfortunately this makes it impossible for me to consider using Karrigell in my work. I recently needed a stand-alone web server for a small in-house project that might possibly be distributed to business partners or become a product some day. I chose CherryPy in part because its license allows this. I would have considered Karrigell if it had a different license. As we say in Yorkshire, You get nowt if you don't ask. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Why my thread can't access the global data?
Op 2005-12-21, ddh schreef [EMAIL PROTECTED]: Hi, I got a problem. I use a 'select' in a loop in the main thread, and when select return, a new thread will be created to handle the network event. And if the client send some special string, the thread will change a global flag to false, so the loop in the main thread will break. But it never work. Below is the code: - s.py (the server) -- import socket import select import thread import sys go_on = True def read_send(s): s.setblocking(1) str = s.recv(1024) print 'recv:', str s.send(str) s.close() if (str == 'quit'): go_on = False print 'User quit...with go_on =', go_on return [ ... ] It has nothing to do with threads. If you assign to a name in a function, that name will be treated as a local variable. So the go_on = False in read_send will not affect the global go_on. If you want to rebind global names in a function you have to use the global statement. So your function would start: def read_send(s): global go_on s.setblocking(1) ... -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: ANNOUNCE; Try python beta
On 20 December 2005, Mike Meyer wrote: Ok, I've given it the interface I want, and made it less of an attractive nuisance. http://www.mired.org/home/mwm/try_python/ is now ready for people to play with. There's no tutorial information on it yet, that's the next thing to do. However, I won't be able to work on it for a while, so if you want to make suggestions about what that should look like, all such suggestions will be given proper consideration. I'm not sure about everyone else, but I find the big warnings about CSS and JavaScript almost as annoying as the fact that it doesn't do anything. At all, even with JavaScript enabled. Then again, my main browser is elinks, so my opinion is somewhat biased. If you get it working in Lynx, supporting other browsers should be easier than the other posts make this solution sound. - Eric -- http://mail.python.org/mailman/listinfo/python-list
Re: Why my thread can't access the global data?
Thank you very much. I am a newbie for python :-) Antoon Pardon wrote: It has nothing to do with threads. If you assign to a name in a function, that name will be treated as a local variable. So the go_on = False in read_send will not affect the global go_on. If you want to rebind global names in a function you have to use the global statement. So your function would start: def read_send(s): global go_on s.setblocking(1) ... -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Xah's Edu Corner: Responsible Software Licensing
On Mon, 19 Dec 2005 10:05:59 GMT, Roedy Green [EMAIL PROTECTED] wrote: On Sun, 18 Dec 2005 18:42:52 -0800, robic0 wrote, quoted or indirectly quoted someone who said : If the software opens a file and is in the middle of writing to it, then the user dumps the power to the machine and ends up having to reformat, thereby losing all his data, at what point does the liability stop? And how is fault proven or dished out? Does the law specifically state repeatability in its language? It would expect it to work much the way a car works. If you have an accident, that is your fault. If the fuel pump is badly designed so it catches fire, that in the manufacturers fault. You'ld have to prove the fuel pump caused your accident wouldn't you? I'm reversed when it comes to engineering. I always assume defects when buss loads of people are killed. If software ever guards lives that isin't certified then its a manufacturing defect. That is imbedded software though. Not the for public consumption. I know that fly-by-wire military software has 100 levels of precaution. Hey but its a 7 million dollar plane and a 700 billion dollar budget. The written requirements for a single design is a book 5 inches thick. Ever see that for Joe bullshit software designer? -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Steve Holden [EMAIL PROTECTED] writes: However the work I do is commercial and proprietary and I doubt I could get approval to release it under GPL. I see the GPL is a problem in this environment, and you are clearly aware of the issues it raises. Do be aware, though, that not all GPL authors are rabid communists, and some will consider licensing to you under other licenses if you ask them. It's always worth asking, as some authors have chosen GPL in a somewhat uninformed way rather than as a political statement (you'll notice I too am trying to avoid the flame wars). I'm trying to avoid flame wars too, but my take on this is that Kent's reading is a little too restrictive and the GPL isn't really a problem in this situation unless he's actually modifying Karrigell itself, rather than writing applications that run under it. I'm not trying to advocate Karrigell (I browsed the docs for a minute and it looks nice but I have no experience with it) but I don't see the GPL as an obstacle to that type of usage. All kinds of proprietary applications are written and distributed all the time to run under the GPL'd Linux kernel and Karrigell apps don't seem too terribly different from that. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Hello all, I am Karrigell's author. I have chosen the GPL licence almost at random (I saw that the Python licence was GPL-compatible), so I don't mind switching to another Open Source licence if the GPL is liable to cause problems. Which one would you advice : BSD ? Python licence ? another ? Regards, Pierre -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Pierre Quentel [EMAIL PROTECTED] writes: I am Karrigell's author. I have chosen the GPL licence almost at random (I saw that the Python licence was GPL-compatible), so I don't mind switching to another Open Source licence if the GPL is liable to cause problems. Which one would you advice : BSD ? Python licence ? another ? My own hope (not shared by everyone obviously) is that you will stay with the GPL, but make clear that applications that simply run under Karrigell but don't modify the Karrigell code aren't subjected to the GPL. That should satisfy Kent's concerns. See http://www.gnu.org/philosophy/pragmatic.html for some reasons to use the GPL. French version: http://www.gnu.org/philosophy/pragmatic.fr.html -- http://mail.python.org/mailman/listinfo/python-list
Re: how to lock a file in ftp site
I've come across this problem - instead of uploading the file to it's intended directory, upload it to a temp directory, with a unique name (say ummddhhmmss where u is username and the rest are obvious) and then *rename* it to it's correct name in the real destination directory. Do the move in a try... except block and if it fails, take evasive action. In FTP a rename (i.e. move) is usually an atomic action but an upload is not. You have an unavoidable race condition here trying to lock a file (even if ftp allowed it) but with the method described above, you can avoid it, but get the same effect. This is a good method for transferring files, it handles broken-transfers especially well (if something on the other end is waiting for a particular filename.) But I think it just moves the locking problem from the upload to a rename. What happends if two clients try to rename their files at a half-second interval: both succeed, but the first-clients changes are clobbered. Actually, speaking of atomic functions, maybe you could use directory creation instead of a rename, because only one directory creation can succeed. This might be able to be incorperated into some sort of locking mechanism. cheers, -kt (obnoxious corporate .sig below) -- Please consider our environment before printing this email. WARNING - This email and any attachments may be confidential. If received in error, please delete and inform us by return email. Because emails and attachments may be interfered with, may contain computer viruses or other defects and may not be successfully replicated on other systems, you must be cautious. Westpac cannot guarantee that what you receive is what we sent. If you have any doubts about the authenticity of an email by Westpac, please contact us immediately. It is also important to check for viruses and defects before opening or using attachments. Westpac's liability is limited to resupplying any affected attachments. This email and its attachments are not intended to constitute any form of financial advice or recommendation of, or an offer to buy or offer to sell, any security or other financial product. We recommend that you seek your own independent legal or financial advice before proceeding with any investment decision. Westpac Institutional Bank is a division of Westpac Banking Corporation, a company registered in New South Wales in Australia under the Corporations Act 2001 (Cth). Westpac is authorised and regulated in the United Kingdom by the Financial Services Authority and is registered at Cardiff in the United Kingdom as Branch No. BR 106. Westpac operates in the United States of America as a federally chartered branch, regulated by the Office of the Comptroller of the Currency. Westpac Banking Corporation ABN 33 007 457 141. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Paul Rubin wrote: Steve Holden [EMAIL PROTECTED] writes: However the work I do is commercial and proprietary and I doubt I could get approval to release it under GPL. I see the GPL is a problem in this environment, and you are clearly aware of the issues it raises. Do be aware, though, that not all GPL authors are rabid communists, and some will consider licensing to you under other licenses if you ask them. It's always worth asking, as some authors have chosen GPL in a somewhat uninformed way rather than as a political statement (you'll notice I too am trying to avoid the flame wars). I'm trying to avoid flame wars too, but my take on this is that Kent's reading is a little too restrictive and the GPL isn't really a problem in this situation unless he's actually modifying Karrigell itself, rather than writing applications that run under it. I'm not trying to advocate Karrigell (I browsed the docs for a minute and it looks nice but I have no experience with it) but I don't see the GPL as an obstacle to that type of usage. All kinds of proprietary applications are written and distributed all the time to run under the GPL'd Linux kernel and Karrigell apps don't seem too terribly different from that. Indeed. But most software authors aren't lawyers and aren't likely to trust their own judgment about these matters unless the situation is pretty unambiguous. I suspect this may be evidence that Microsoft's viral propaganda has had some effect. In this case I agree there's likely to be a clear separation between server and content that will allow Kent to distribute an unmodified Karrigell and a separate proprietary content bundle without interference, but it's too late (at least for that project) now. regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Steve Holden [EMAIL PROTECTED] writes: Indeed. But most software authors aren't lawyers and aren't likely to trust their own judgment about these matters unless the situation is pretty unambiguous. I suspect this may be evidence that Microsoft's viral propaganda has had some effect. Hmm, good point. In this case I agree there's likely to be a clear separation between server and content that will allow Kent to distribute an unmodified Karrigell and a separate proprietary content bundle without interference, but it's too late (at least for that project) now. Oh well. -- http://mail.python.org/mailman/listinfo/python-list
Re: Wanted: binary of OpenCV Python extension module for Windows
Claudio Grondi wrote: OpenCV means Intel® Open Source Computer Vision Library. It is a collection of C functions and a few C++ classes that implement some popular Image Processing and Computer Vision algorithms. OpenCV library is mainly aimed at real time computer vision. Some example areas would be Human-Computer Interaction (HCI); Object Identification, Segmentation and Recognition; Face Recognition; Gesture Recognition; Motion Tracking, Ego Motion, Motion Understanding; Structure From Motion (SFM); and Mobile Robotics: Overview: http://www.intel.com/technology/computing/opencv/overview.htm Download: http://heanet.dl.sourceforge.net/sourceforge/opencvlibrary/chopencv-2.3.0-win.zip OpenCV provides a Python wrapper in OpenCV\interfaces\swig\python\ directory, but I have no idea how to turn it into a Windows binary yet. I have downloaded SWIG, but it creates files which are already in the directory, so it was the wrong idea. Probably I have to compile the _cv.cpp as a DLL, but my MS .NET 2003 Visual C++ compiler throws tons of error messages at me when I create an empty project, telling it should create an DLL out of _cv.cpp and then try to compile it. It would be so nice to have this Computer Vision Library as extension module in my modules library. Any hints how to achieve it? Claudio For your information: The conclusion from contacting the authors of the Python wrapper for OpenCV is, that there is currently only support for Linux, but no for the Windows platform available. The http://heanet.dl.sourceforge.net/sourceforge/opencvlibrary/chopencv-2.3.0-win.zip dowload is outdated, so anyone willing to dig into this deeper should access the CVS repository for the latest additions and changes. Anyone interested in this subject and especially in the available distutils setup script (fails to build the Python wrapper on Windows with .NET 2003) from the CVS is welcome to contact me per email. Claudio -- http://mail.python.org/mailman/listinfo/python-list
Is it possible to use python to unit test C++ code?
Is it possible to use python to unit test C++ code? If yes, is there any example available? Thank you. -- http://mail.python.org/mailman/listinfo/python-list
Re: type 'slice' is not an acceptable base type
Op 2005-12-21, Michael Hoffman schreef [EMAIL PROTECTED]: Antoon Pardon wrote: Traceback (most recent call last): File stdin, line 1, in ? File vslice.py, line 48, in ? class iterslice(slice): TypeError: Error when calling the metaclass bases type 'slice' is not an acceptable base type Searching for not an acceptable base type in the Python source reveals that this exception is produced when the proposed base type doesn't have Py_TPFLAGS_BASETYPE set. So what is going on. I thought the class vs type distinction was eliminated in order to be able to subclass base types. So why doesn't this work? slice.__base__ == object. It's the basetype flag issue. You could propose a patch to make it subclassable. I'll keep this is mind. It'll have to wait for after the holidays though. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Parsing a date-time string?
Hi, I want to parse strings containing date-time, which look like the following: Mon Dec 19 11:06:12:333 CET 2005 That's a problem for strptime it seems, b/c I cannot find any format-spec for the milliseconds-part in here. (I'm also not sure about the validity of the tz part, but ...) As an aside, the dates are all in english while my PC might have a dutch locale -- not even sure about what Python would consider the current locale. So that's an extra obstacle to parsing these dates. The datetime module doesn't seem to provide a better solution either. What I want to get is some sort of sortable date; either as a number or (if nothing else) as a string in ISO8601 format. (But I want to avoid doing too many string manipulations on my input dates; and changing the dateformat of the input-source will be hard if at all justifiable.) Any help is appreciated. Cheers, --Tim -- http://mail.python.org/mailman/listinfo/python-list
Globals, Locals Dictionaries + Callbacks Question
Hello, I'm having a bit of trouble isolating my scripts from each other in my embedded Python interpreter, so that their global namespaces don't get all entangled. I've had some luck with PyRun_FileEx(), as you can specify dictionaries to use for the globals and locals, but it seems that you can't do the same for PyEval_CallObject() (which i use for calling the callbacks previously registered by scripts run via PyRun_FileEx()). Is there any way to substitute the current global/local dictionaries, run the callback, then switch back to the default? It would be just as good if I could switch between several sets of global variable dictionaries, one for each script; unfortunately, the documentation is less than informative on this point (there isn't even a formal defintion for PyEval_CallObject()). Also, I'm aware that eval() and exec() allow you to pass in global/local dictionaries, but I think it'd be a bit wasteful to drop into Python, run exec(), then have that call my callback, rather than just calling the callback directly from the host program. Thanks in advance -- http://mail.python.org/mailman/listinfo/python-list
scipy.stats.itemfreq: overflow with add.reduce
Hi All, I was playing with scipy.stats.itemfreq when I observed the following overflow: In [119]:for i in [254,255,256,257,258]: .:l=[0]*i .:print i, stats.itemfreq(l), l.count(0) .: 254 [ [ 0 254]] 254 255 [ [ 0 255]] 255 256 [ [0 0]] 256 257 [ [0 1]] 257 258 [ [0 2]] 258 itemfreq is pretty small (in stats.py): -- def itemfreq(a): Returns a 2D array of item frequencies. Column 1 contains item values, column 2 contains their respective counts. Assumes a 1D array is passed. Returns: a 2D frequency table (col [0:n-1]=scores, col n=frequencies) scores = _support.unique(a) scores = sort(scores) freq = zeros(len(scores)) for i in range(len(scores)): freq[i] = add.reduce(equal(a,scores[i])) return array(_support.abut(scores, freq)) -- It seems that add.reduce is the source for the overflow: In [116]:from scipy import * In [117]:for i in [254,255,256,257,258]: .:l=[0]*i .:print i, add.reduce(equal(l,0)) .: 254 254 255 255 256 0 257 1 258 2 Is there any possibility to avoid the overflow? BTW: Python 2.3.5 (#2, Aug 30 2005, 15:50:26) [GCC 4.0.2 20050821 (prerelease) (Debian 4.0.1-6)] on linux2 scipy_version.scipy_version -- '0.3.2' Thanks and best regards Hans Georg Krauthäuser -- http://mail.python.org/mailman/listinfo/python-list
Re: Parsing a date-time string?
Quick response - there is a DateUtil module with a *very* flexible string-to-date parser. It will almost certainly do what you want : http://labix.org/python-dateutil All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
How to check if a string is an int?
How do I check if a string contains (can be converted to) an int? I want to do one thing if I am parsing and integer, and another if not. /David -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to use python to unit test C++ code?
On 21 Dec 2005, at 09:33, [EMAIL PROTECTED] wrote: Is it possible to use python to unit test C++ code? If yes, is there any example available? Thank you. -- http://mail.python.org/mailman/listinfo/python-list You could use Python to unittest a Python module written in C++ I suppose. I guess that would probably work. I suspect that you would get better/more accurate/reliable results by writing your tests in C+ + as well though. -- http://mail.python.org/mailman/listinfo/python-list
Re: putting checkbuttons in a listbox
valen1260 wrote: I'd like to have a multicolumn listbox, with one column being a list of items and the other being a list of checkbuttons. The user could check his favorites and then shorten the list to show only the checked items. I have implemented the MultiListbox at http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/52266 . I then tried attaching the checkbuttons to a listbox object. To get them to display, I had to pack them, but in packing them, they just disregard the scrollable listbox and take as much room as needed. Has anyone implemented anything like this? Is there a way to put checkbuttons in a fixed-height, scrollable listbox or similar structure? snipped from the above recipe :- Discussion: The resulting widget is lightweight, fast, and very easy to use. The main limitation is that only text is supported which is a fundamental limitation of the Listbox. In this implementation, only single-selection is allowed but it could be extended to multiple selection. User-resizeable columns and auto-sorting by clicking on the column label should also be possible. Auto-scrolling while dragging Button-1 was disabled because this was breaks the synchronization between the lists. However, scrolling with Button-2 works fine. so you cannot put anything other than text into a standard Tk Listbox however you could try using a non-standard table widget see here for more details :- http://tkinter.unpythonic.net/wiki/Widgets Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
I definitely don't want to invent another licence, there are enough of them already ! Pierre -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
[EMAIL PROTECTED] wrote: How do I check if a string contains (can be converted to) an int? I want to do one thing if I am parsing and integer, and another if not. try: x = int(aPossibleInt) ... do something with x ... except ValueError: ... do something else ... -- Erik Max Francis [EMAIL PROTECTED] http://www.alcyone.com/max/ San Jose, CA, USA 37 20 N 121 53 W AIM erikmaxfrancis May it not be that, at least, the brighter stars are like our Sun, the upholding and energizing centres of systems of worlds, adapted to -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Paul Rubin wrote: Pierre Quentel [EMAIL PROTECTED] writes: I am Karrigell's author. I have chosen the GPL licence almost at random (I saw that the Python licence was GPL-compatible), so I don't mind switching to another Open Source licence if the GPL is liable to cause problems. Which one would you advice : BSD ? Python licence ? another ? My own hope (not shared by everyone obviously) is that you will stay with the GPL, but make clear that applications that simply run under Karrigell but don't modify the Karrigell code aren't subjected to the GPL. That should satisfy Kent's concerns. Unfortunately, that doesn't really satisfy the GPL's concerns. The work arguably contains or is derived from Karrigell, which is explicitly covered in section 2b of the GPL. If you start excluding key clauses from the GPL, then there's little point using it. To cut a long story short, and to avoid quibbling over the details of how a license designed with the low-level mechanics of C-style programs and libraries in mind actually applies to a language like Python with very loose coupling, I'll just say that this sort of situation is exactly what the LGPL exists for. I would suggest the author adopts the LGPL as a good compromise between the community benefits of GPL and the user benefits of, say, BSD or zlib licenses. -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
Re: scipy.stats.itemfreq: overflow with add.reduce
Hans Georg Krauthaeuser schrieb: Hi All, I was playing with scipy.stats.itemfreq when I observed the following overflow: In [119]:for i in [254,255,256,257,258]: .:l=[0]*i .:print i, stats.itemfreq(l), l.count(0) .: 254 [ [ 0 254]] 254 255 [ [ 0 255]] 255 256 [ [0 0]] 256 257 [ [0 1]] 257 258 [ [0 2]] 258 itemfreq is pretty small (in stats.py): -- def itemfreq(a): Returns a 2D array of item frequencies. Column 1 contains item values, column 2 contains their respective counts. Assumes a 1D array is passed. Returns: a 2D frequency table (col [0:n-1]=scores, col n=frequencies) scores = _support.unique(a) scores = sort(scores) freq = zeros(len(scores)) for i in range(len(scores)): freq[i] = add.reduce(equal(a,scores[i])) return array(_support.abut(scores, freq)) -- It seems that add.reduce is the source for the overflow: In [116]:from scipy import * In [117]:for i in [254,255,256,257,258]: .:l=[0]*i .:print i, add.reduce(equal(l,0)) .: 254 254 255 255 256 0 257 1 258 2 Is there any possibility to avoid the overflow? BTW: Python 2.3.5 (#2, Aug 30 2005, 15:50:26) [GCC 4.0.2 20050821 (prerelease) (Debian 4.0.1-6)] on linux2 scipy_version.scipy_version -- '0.3.2' Thanks and best regards Hans Georg Krauthäuser After some further investigation: In [150]:add.reduce(array(equal([0]*256,0),typecode='l')) Out[150]:256 In [151]:add.reduce(equal([0]*256,0)) Out[151]:0 The problem occurs with arrays with typecode 'b' (as returned by equal). Workaround patch for itemfreq is obvious, but ... is it a bug or a feature? regards Hans Georg -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Ben Sizer [EMAIL PROTECTED] writes: Unfortunately, that doesn't really satisfy the GPL's concerns. The work arguably contains or is derived from Karrigell, I don't see that. The web app gets run by Karrigell like a CGI script is run by Apache, like a Linux app is run by the Linux kernel. The Linux kernel is GPL but that doesn't mean every Linux app that calls through the kernel through its documented API is affected. The Linux kernel GPL only comes into play if you start modifying the kernel, not writing programs that use it. which is explicitly covered in section 2b of the GPL. If you start excluding key clauses from the GPL, then there's little point using it. There should be no exclusion. To cut a long story short, and to avoid quibbling over the details of how a license designed with the low-level mechanics of C-style programs and libraries in mind actually applies to a language like Python with very loose coupling, I'll just say that this sort of situation is exactly what the LGPL exists for. The LGPL has fallen into some disfavor at the FSF, and I don't see Karrigell as a library. The application is not an integrated blob combining Karrigell and user code, from what I can tell. Rather, the user code is run under Karrigell's control, like Karrigell itself is run under the Python interpreter. I would suggest the author adopts the LGPL as a good compromise between the community benefits of GPL and the user benefits of, say, BSD or zlib licenses. But that doesn't gain the community benefits of the GPL since it foregoes the possibility of users improving Karrigell by incorporating other GPL'd code into it and distributing the improved version. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
[Pierre] I am Karrigell's author. I have chosen the GPL licence almost at random (I saw that the Python licence was GPL-compatible), so I don't mind switching to another Open Source licence if the GPL is liable to cause problems. Which one would you advice : BSD ? Python licence ? another ? Well done on being open-minded! You will hear valid arguments for GPL, LGPL, BSD and other licenses (though the Python license is unsuitable for anything other than Python - see http://wiki.python.org/moin/PythonSoftwareFoundationLicenseFaq) A good solution would be multiple-licensing. You state that the code is (for example) triple-licensed under the GPL, LGPL and BSD licenses. The user of your code decides which license to obey. It's no more work for you, and you can please almost everyone (the only people you won't please are those who believe that there is One True License, and frankly you should ignore them - it's your code). The only downside of allowing people to choose the BSD license rather than the GPL is that potentially someone can choose the BSD license, improve Karrigell, ship their product based on the improved code, and not give those improvements back to the community. But the Python license allows for this too, and Python hasn't suffered for it. IMO choosing a BSD license will get you more users than GPL, and the benefits of that will outweigh the potential downside. -- Richie Hindle [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Richie Hindle [EMAIL PROTECTED] writes: A good solution would be multiple-licensing. You state that the code is (for example) triple-licensed under the GPL, LGPL and BSD licenses. The user of your code decides which license to obey. It's no more work for you, and you can please almost everyone (the only people you won't please are those who believe that there is One True License, and frankly you should ignore them - it's your code). That's silly, you might as well just use BSD instead of triple licensing like that. The only downside of allowing people to choose the BSD license rather than the GPL is that potentially someone can choose the BSD license, improve Karrigell, ship their product based on the improved code, and not give those improvements back to the community. Another downside to BSD is that it becomes impermissible to improve Karrigell by transplanting GPL code into it from other programs. Yet another downside is that it leads some potential contributors to not bother getting involved with such projects. (On the other hand, it possibly attracts some different potential contributors). But the Python license allows for this too, and Python hasn't suffered for it. That Python hasn't suffered for it is a questionable assertion. IMO choosing a BSD license will get you more users than GPL, and the benefits of that will outweigh the potential downside. Of course anyone is entitled to hold any opinion they choose. I have to say both notions expressed there (that BSD will attract more users, and that merely attracting more users produces such big benefits) are questionable. As for me, for something like this, I'd be more interested in attracting more contributors than in merely attracting more users with me doing all the work. But what Karrigell's author wants is of course purely up to the him. -- http://mail.python.org/mailman/listinfo/python-list
coverting EST to PST
Hi All, i got a problem. I need to convert time from EST standard to PST standard. Thu, 15 Dec 2005 09:24:19 -0500 to PST this time i need to convert as PST time is there any python code which helps me. your help will be greatly apreciated. Thanks, Narendra -- http://mail.python.org/mailman/listinfo/python-list
Guido at Google
It seems that our master Guido van Rossum had an offer from google and he accepted it!! long life to Guido Goole ! many things to come ;) ju² -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
On Wed, 21 Dec 2005 02:12:35 -0800, [EMAIL PROTECTED] wrote: How do I check if a string contains (can be converted to) an int? I want to do one thing if I am parsing and integer, and another if not. Okay, this has got to be homework, surely. This is the third, maybe the fourth, question on this topic in a week or so :-) In Python, the best solution to most how can I check if X is a something questions is usually the Nike motto: Just Do It. # s is some arbitrary string object try: n = int(s) print Integer %d % n except ValueError: print Not an integer %s % s try...except blocks are cheap in Python. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Steve Holden wrote: Paul Rubin wrote: I'm trying to avoid flame wars too, but my take on this is that Kent's reading is a little too restrictive and the GPL isn't really a problem in this situation unless he's actually modifying Karrigell itself, rather than writing applications that run under it. I'm not trying to advocate Karrigell (I browsed the docs for a minute and it looks nice but I have no experience with it) but I don't see the GPL as an obstacle to that type of usage. All kinds of proprietary applications are written and distributed all the time to run under the GPL'd Linux kernel and Karrigell apps don't seem too terribly different from that. You may be right, I honestly don't know. Would your interpretation change if I wanted to distribute an app built with py2exe that bundles Karrigell and my code? Indeed. But most software authors aren't lawyers and aren't likely to trust their own judgment about these matters unless the situation is pretty unambiguous. That really is the issue as much as anything. Paul has raised some good questions for which I don't have good answers. Maybe using Karrigell is analogous to writing an app to run on Linux. OTOH maybe it is more like linking to a library. I could ask the author for clarification - which I would then have to document in a form acceptable to my own company's lawyers. Or I could choose to use a product that doesn't leave any doubt that I can distribute it as I like in a proprietary product. I suspect this may be evidence that Microsoft's viral propaganda has had some effect. Not in my case, at least. I have been avoiding GPL products at work for many years, much longer than Microsoft has been telling me to do so. In this case I agree there's likely to be a clear separation between server and content that will allow Kent to distribute an unmodified Karrigell and a separate proprietary content bundle without interference, but it's too late (at least for that project) now. Maybe next time... Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Pierre Quentel ha scritto: Hello all, I am Karrigell's author. I have chosen the GPL licence almost at random (I saw that the Python licence was GPL-compatible), so I don't mind switching to another Open Source licence if the GPL is liable to cause problems. Which one would you advice : BSD ? Python licence ? another ? I think you should use the BSD or the Python License. I've choose the BSD for my works, with these clauses (my intentions are clearly stated, so no misinterpretation should be done): Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. 3. If the binary program depends on a modified version of this package, you are encouraged to publicly release the modified version of this package. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS AS IS AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. And it is almost the same of CherryPy, which you use. -- ()_() | Ho un cervello, non sono analfabeta e non sento| + (o.o) | l'irrefrenabile bisogno di deturpare la mia lingua | +---+ 'm m' | madre con K ed abbreviazioni... | O | (___) | K.K.K (Kill the Key Klub)| raffaele punto salmaso at gmail punto com -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Can't we just check if the string has digits? For example: x = '15' if x.isdigit(): print int(x)*3 45 -- http://mail.python.org/mailman/listinfo/python-list
Re: Guido at Google
That's potentially very good news. (Or slightly sinister -depending on your paranoia levels). You got any references on that ? I was just thinking that the open source offerings from google are actually pretty pitiful - considering the time investment they have put into developing software systems. (Summer of Code not-withstanding of course). I wonder if this heralds google finally upgrading from Python 2.2 ;-) All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Kent Johnson wrote: OK I'll try. First let me say I have no interest in a licensing flame war, there are valid reasons why an author might prefer one license over another and certainly there are good reasons to choose GPL. However the work I do is commercial and proprietary and I doubt I could get approval to release it under GPL. So I am restricted to projects with more liberal licenses such as MIT, BSD and Apache licenses. These allow closed-source distribution of products based on them. As long as the author holds copyright on all the code, he can release it to you under any license he wants, as well as via GPL to the world (this is how MySQL and SleepyCat opterate). So you could, for example, offer him X pounds/dollars/euros for a BSD version + support etc. Arthur -- Arthur Clune -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
It's not homework in my case, I don't know about the others :) -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Neuruss wrote: Can't we just check if the string has digits? For example: x = '15' if x.isdigit(): print int(x)*3 45 No, we can't. '-15' has non-digits but is a valid int. Another point is that the try-except can also be used for string-to-float conversion -- http://mail.python.org/mailman/listinfo/python-list
Re: Globals, Locals Dictionaries + Callbacks Question
Faisal Alquaddoomi wrote: Hello, I'm having a bit of trouble isolating my scripts from each other in my embedded Python interpreter, so that their global namespaces don't get all entangled. [tales of woe ...] Would it help to use PyNewInterpreter to create subinterpreters for each of the different scripts? regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
BSD license is good. It requires that your copyright notice be included with any derivative works - but otherwise lets users create and distribute derivatives how they see fit. The version I use is at http://www.voidspace.org.uk/python/license.shtml (which links to the version at the OSI). The MIT license is even *less* restrictive. I would use one or other of these two. All the best, Fuzzyman http://www.voidspace.org.uk/python/index.shtml -- http://mail.python.org/mailman/listinfo/python-list
Re: ANNOUNCE; Try python beta
I'm afraid that I've spoiled the try_python working by means of executing the sentence: open(try.py).write(\n) Sorry. I hope it don't be difficult for you to restore the module again to the default folder. In any case, I think it should include some control for malicious code like that one. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
On Wed, 21 Dec 2005 03:37:27 -0800, Neuruss wrote: Can't we just check if the string has digits? Why would you want to? For example: x = '15' if x.isdigit(): print int(x)*3 15 is not a digit. 1 is a digit. 5 is a digit. Putting them together to make 15 is not a digit. If you really wanted to waste CPU cycles, you could do this: s = 1579 for c in s: if not c.isdigit(): print Not an integer string break else: # if we get here, we didn't break print Integer %d % int(s) but notice that this is wasteful: first you walk the string, checking each character, and then the int() function has to walk the string again, checking each character for the second time. It is also buggy: try s = -1579 and it will wrongly claim that s is not an integer when it is. So now you have to waste more time, and more CPU cycles, writing a more complicated function to check if the string can be converted. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Creating interactive command-line Python app?
Hello All, Newbie to Python, and I'm wondering if it's possible to create a Python console app that prompts for further input on the command line when run (in Windows XP, if that's important)? I've tried Googling, but the results are overwhelmingly about interactive Python environments (IPython etc etc), instead of how to achieve prompting at the command line when running your own Python app. Any help appreciated! Much warmth, planetthoughtful -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Steven D'Aprano wrote: On Wed, 21 Dec 2005 03:37:27 -0800, Neuruss wrote: x = '15' if x.isdigit(): print int(x)*3 15 is not a digit. 1 is a digit. 5 is a digit. Putting them together to make 15 is not a digit. Maybe so, but '15'.isdigit() == True: isdigit(...) S.isdigit() - bool Return True if all characters in S are digits and there is at least one character in S, False otherwise. '15'.isdigit() True though your other points are valid and I agree this is not the right solution to the OP. Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Kent Johnson [EMAIL PROTECTED] writes: Maybe so, but '15'.isdigit() == True: isdigit(...) S.isdigit() - bool Return True if all characters in S are digits and there is at least one character in S, False otherwise. Auh!! -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Op 2005-12-21, Steven D'Aprano schreef [EMAIL PROTECTED]: On Wed, 21 Dec 2005 03:37:27 -0800, Neuruss wrote: Can't we just check if the string has digits? Why would you want to? For example: x = '15' if x.isdigit(): print int(x)*3 15 is not a digit. 1 is a digit. 5 is a digit. Putting them together to make 15 is not a digit. So? the isdigit method tests whether all characters are digits. '15'.isdigit() True -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Paul Rubin wrote: Kent Johnson [EMAIL PROTECTED] writes: You've lost me here. The server certainly would contain Karrigell code, it wouldn't function without it. I don't understand the analogy to GCC, the web site is not something that is compiled with Karrigell. Karrigell is a library or framework that is an essential part of the server. I don't know how I would write the app without Karrigell. Let me ask it this way: suppose you used ASP instead. As I understand ASP, it's like PHP except it's proprietary. Would ASP's license be a problem? Maybe you're using the server to encompass too much. If I have an Apache-based web site, then the web server is Apache. If I have a Python CGI script that the Apache server runs, the CGI script is not the server--it's an application running under the server. It would not be affected by the GPL if Apache used the GPL. Karrigell scripts seem to me to work out about the same way. You may be right, I don't know. In the case of CherryPy, my code is a bit more intimate with CP than a CGI is with Apache - I import CP modules, subclass CP classes and make calls to CP functions from my code. My guess is a Karrigell-based server would be similar. Where would you draw the line? Suppose I want to use a GPLed library in my Python code, does that mean I have to distribute my code under the GPL if I distribute them together? Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Creating interactive command-line Python app?
planetthoughtful wrote: Hello All, Newbie to Python, and I'm wondering if it's possible to create a Python console app that prompts for further input on the command line when run (in Windows XP, if that's important)? I've tried Googling, but the results are overwhelmingly about interactive Python environments (IPython etc etc), instead of how to achieve prompting at the command line when running your own Python app. Any help appreciated! Much warmth, planetthoughtful Yes. Look at the raw_input() function: result = raw_input(What can I do for you? ) What can I do for you? Something result 'Something' regards Steve -- Steve Holden +44 150 684 7255 +1 800 494 3119 Holden Web LLC www.holdenweb.com PyCon TX 2006 www.python.org/pycon/ -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
On Wed, 21 Dec 2005 07:36:15 -0500, Kent Johnson wrote: Maybe so, but '15'.isdigit() == True: Well I'll be a monkey's uncle. In that case, the name is misleadingly wrong. I suppose it is not likely that it could be changed before Python 3? -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Steven D'Aprano wrote: If you really wanted to waste CPU cycles, you could do this: s = 1579 for c in s: if not c.isdigit(): print Not an integer string break else: # if we get here, we didn't break print Integer %d % int(s) but notice that this is wasteful: first you walk the string, checking each character, and then the int() function has to walk the string again, checking each character for the second time. Wasteful enough that there is a specific built-in function to do just this ? -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
In article [EMAIL PROTECTED], [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: How do I check if a string contains (can be converted to) an int? I want to do one thing if I am parsing and integer, and another if not. /David The most straight-forward thing is to try converting it to an int and see what happens. try: int(s) except ValueError: print sorry, '%s' isn't a valid integer % s -- http://mail.python.org/mailman/listinfo/python-list
os.path.splitext() and case sensitivity
Hi, Is there a way to make os.path.splitext() case agnostic? def remove_file_type(target_dir, file_type): for root, dirs, files in os.walk(target_dir): for f in files: if os.path.splitext(os.path.join(root, f))[1] in file_type: pass remove_file_type(sysroot, ['.tmp', '.TMP']) As you can see, the way I do it now, I place file extensions in a list. However, I'd like to able just to say '.tmp' and for that to work on any type of file that has tmp (no matter the case) in the extension. Many thanks!!! -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
Steven D'Aprano wrote: On Wed, 21 Dec 2005 07:36:15 -0500, Kent Johnson wrote: Maybe so, but '15'.isdigit() == True: Well I'll be a monkey's uncle. In that case, the name is misleadingly wrong. I suppose it is not likely that it could be changed before Python 3? That was my first thought too, Steven, but then I considered whether I'd think the same about the others: islower, isspace, istitle, isupper, isalnum, isalpha. Some of those suffer from the same confusion, probably inspired by having written lots of C in the past, but certain istitle wouldn't be particularly useful on a single character. isalnum and isalpha don't necessarily invoke the same mental awkwardness since, after all, what is an alpha? It could just as well be read is this string alphabetic as is this character 'an alpha'. Given that Python doesn't have a distinct concept of character (but merely a string of length one), having those routines operate on the entire string is probably pretty sensible, and I'm not sure that naming them isdigits() would be helpful either since then it would feel awkward to use them on length-one-strings. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: os.path.splitext() and case sensitivity
rbt wrote: Hi, Is there a way to make os.path.splitext() case agnostic? def remove_file_type(target_dir, file_type): for root, dirs, files in os.walk(target_dir): for f in files: if os.path.splitext(os.path.join(root, f))[1] in file_type: pass remove_file_type(sysroot, ['.tmp', '.TMP']) As you can see, the way I do it now, I place file extensions in a list. However, I'd like to able just to say '.tmp' and for that to work on any type of file that has tmp (no matter the case) in the extension. Many thanks!!! One solution would be to convert the extensions to lowercase (or uppercase, if you prefer that) if fileExtension.lower() == .tmp: -- http://mail.python.org/mailman/listinfo/python-list
Re: os.path.splitext() and case sensitivity
[rbt] Is there a way to make os.path.splitext() case agnostic? def remove_file_type(target_dir, file_type): for root, dirs, files in os.walk(target_dir): for f in files: if os.path.splitext(os.path.join(root, f))[1] in file_type: pass remove_file_type(sysroot, ['.tmp', '.TMP']) def remove_file_type(target_dir, file_type): [...] if os.path.splitext(f)[1].lower() == file_type.lower(): pass remove_file_type(sysroot, '.tmp') -- Richie Hindle [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: When Python *Eggs* better than Python *distutils*?? What's Eggs?
Xavier Morel wrote: [EMAIL PROTECTED] wrote: So basically Python Eggs precompiles and compresses binaries for you so you just have to load it to run your app? Nah, Eggs is a packaging system, what you don't have to do is compile/configure, because the packaging does that for you. It also handles things like pre-required packages (the packages that this package uses), even though that doesn't always work atm. If you ever used a debian-based linux system, think of Eggs as a Python-specific apt-get. The most advanced kind of language-specific installer atm is the Ruby Gems packaging and distribution system (http://docs.rubygems.org/), go check it for more insight of what Eggs wants to be (and I hope it'll evolve to be as good as gems) (and the install software should be named eggs or hatch, not easy_install, ugly). I think this is one very specific area that one BIG community-wide concerted effort is better than a few smaller ones. Is there any chance of better coordination in this area? maurice -- http://mail.python.org/mailman/listinfo/python-list
Re: os.path.splitext() and case sensitivity
Richie Hindle wrote: [rbt] Is there a way to make os.path.splitext() case agnostic? def remove_file_type(target_dir, file_type): for root, dirs, files in os.walk(target_dir): for f in files: if os.path.splitext(os.path.join(root, f))[1] in file_type: pass remove_file_type(sysroot, ['.tmp', '.TMP']) def remove_file_type(target_dir, file_type): [...] if os.path.splitext(f)[1].lower() == file_type.lower(): pass remove_file_type(sysroot, '.tmp') Thanks guys!!! -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Paul Rubin wrote: Ben Sizer [EMAIL PROTECTED] writes: Unfortunately, that doesn't really satisfy the GPL's concerns. The work arguably contains or is derived from Karrigell, I don't see that. The web app gets run by Karrigell like a CGI script is run by Apache, like a Linux app is run by the Linux kernel. The web app uses parts of Karrigell though - things like the QUERY variable or or Session object. That is analogous to linking with Karrigell as a library. The LGPL has fallen into some disfavor at the FSF, and I don't see Karrigell as a library. The LGPL ultimate subverts the intent of the GPL in that it lets people use open source code without having to give much back. Still, it is 'better' in that regard than BSD or zlib. The only practical difference in this case would be that the LGPL makes it clear that there's a separation between your code and Karrigell code. The application is not an integrated blob combining Karrigell and user code, from what I can tell. Rather, the user code is run under Karrigell's control, like Karrigell itself is run under the Python interpreter. I see your point, but I think 95% of Karrigell apps will end up making calls back into the framework. The intent of the GPL is arguably that if you rely directly upon some GPL code for your application, your app falls under the license. From: http://www.gnu.org/licenses/gpl-faq.html#MereAggregation : What constitutes combining two parts into one program? This is a legal question, which ultimately judges will decide.[...] If modules are designed to run linked together in a shared address space, that almost surely means combining them into one program. By contrast, pipes, sockets and command-line arguments are communication mechanisms normally used between two separate programs. So when they are used for communication, the modules normally are separate programs. But if the semantics of the communication are intimate enough, exchanging complex internal data structures, that too could be a basis to consider the two parts as combined into a larger program. This is largely academic since the author seems willing to reconsider the license; but it's an interesting point for applications like this generally, especially in Python where 'linking' is a little less stringently defined than in C/C++. -- Ben Sizer -- http://mail.python.org/mailman/listinfo/python-list
libxml2 and mindom
I am parsing xml file using libxml2 and for navigating the document object tree I want to use minidom. Is it possible. Can anyone give me any example for the same ? -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing engineering symbols
Exactly what I wanted.
It would be nice if the standard float function takes care of these.
regards,
Suresh
how about:
SI_prefixes = {
'Y':24, 'Z':21, 'E':18, 'P':15, 'T':12, 'G':9, 'M':6, 'k':3,
'h':2, 'd':-1, 'c':-2, 'm':-3, u'\xb5':-6, 'u':-6, 'n':-9, 'p':-12,
'f':-15, 'a':-18, 'z':-21, 'y':-24
}
def myfloat(str):
try:
exp = SI_prefixes[str[-1]]
return float(str[:-1]) * 10**exp
except KeyError:
return float(str)
?
/F
--
http://mail.python.org/mailman/listinfo/python-list
Re: os.path.splitext() and case sensitivity
Juho Schultz wrote: rbt wrote: Hi, Is there a way to make os.path.splitext() case agnostic? def remove_file_type(target_dir, file_type): for root, dirs, files in os.walk(target_dir): for f in files: if os.path.splitext(os.path.join(root, f))[1] in file_type: pass remove_file_type(sysroot, ['.tmp', '.TMP']) As you can see, the way I do it now, I place file extensions in a list. However, I'd like to able just to say '.tmp' and for that to work on any type of file that has tmp (no matter the case) in the extension. Many thanks!!! One solution would be to convert the extensions to lowercase (or uppercase, if you prefer that) if fileExtension.lower() == .tmp: Many thanks... I did it this way as I sometimes delete files with different extensions: def remove_file_type(target_dir, file_type): for root, dirs, files in os.walk(target_dir): for f in files: if os.path.splitext(os.path.join(root, f))[1].lower() in file_type: remove_file_type(user_docs, ['.tmp', '.mp3']) -- http://mail.python.org/mailman/listinfo/python-list
Re: Guido at Google
It seems that our master Guido van Rossum had an offer from google and he accepted it!! Isn't Guido-Sans official title BDFL? *wink* whatever, if it's true, congratulations and best wishes. Now there is one *bot and the BDFL at google, we have still 3 bots in the wild, do we? Suggesting to name a Rigobot Harald -- http://mail.python.org/mailman/listinfo/python-list
Easiest way to calculate number of character in string
Hi there, I have a string in which I want to calculate how often the character ';' occurs. If the character does not occur 42 times, the ; should be added so the 42 are reached. My solution is slow and wrong: for Position in range (0, len(Zeile)): if Zeile[Position]==';': AnzahlSemikolon = AnzahlSemikolon +1 if AnzahlSemikolon 42: for Zaehler in range(AnzahlSemikolon, 42): Zeile = Zeile + ';' Dreckskram = Dreckskram +1 How can this be achieved easily? Thanks, Pascal -- http://mail.python.org/mailman/listinfo/python-list
Re: Creating interactive command-line Python app?
You may also find the cmd module useful, see: http://docs.python.org/lib/module-cmd.html Cheers, Keir. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python on Nintendo DS
Hi! Super mega cool. Thanks! MCI -- http://mail.python.org/mailman/listinfo/python-list
Re: Easiest way to calculate number of character in string
On Wed, 2005-12-21 at 09:03, P. Schmidt-Volkmar wrote:
Hi there,
I have a string in which I want to calculate how often the character ';'
occurs. If the character does not occur 42 times, the ; should be added so
the 42 are reached.
My solution is slow and wrong:
for Position in range (0, len(Zeile)):
if Zeile[Position]==';': AnzahlSemikolon = AnzahlSemikolon +1
if AnzahlSemikolon 42:
for Zaehler in range(AnzahlSemikolon, 42):
Zeile = Zeile + ';'
Dreckskram = Dreckskram +1
How can this be achieved easily?
Thanks,
Pascal
AnzahlSemikolon = Zeile.count(';')
if AnzahlSemikolon 42:
Zeile += ';'*(42-AnzahlSemikolon)
HTH,
Carsten.
--
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Re: Easiest way to calculate number of character in string
should = 42
has = Zeile.count(';')
if has should:
Zeile += ;*(should - has)
cheers, claude
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Re: Easiest way to calculate number of character in string
Il 2005-12-21, P. Schmidt-Volkmar [EMAIL PROTECTED] ha scritto: Hi there, I have a string in which I want to calculate how often the character ';' occurs. If the character does not occur 42 times, the ; should be added so the 42 are reached. My solution is slow and wrong: for Position in range (0, len(Zeile)): if Zeile[Position]==';': AnzahlSemikolon = AnzahlSemikolon +1 if AnzahlSemikolon 42: for Zaehler in range(AnzahlSemikolon, 42): Zeile = Zeile + ';' Dreckskram = Dreckskram +1 How can this be achieved easily? One way can be this I think: s = your_string_full_of_; num_of_semicolons = len(s.split(;) - 1) -- Lawrence - http://www.oluyede.org/blog Anyone can freely use whatever he wants but the light at the end of the tunnel for most of his problems is Python -- http://mail.python.org/mailman/listinfo/python-list
Re: Easiest way to calculate number of character in string
P. Schmidt-Volkmar wrote: Hi there, I have a string in which I want to calculate how often the character ';' occurs. If the character does not occur 42 times, the ; should be added so the 42 are reached. My solution is slow and wrong: How can this be achieved easily? Is this homework? str.count() and string multiplication are your friends here. See http://docs.python.org/lib/string-methods.html http://docs.python.org/lib/typesseq.html Kent -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Richie Hindle wrote: You will hear valid arguments for GPL, LGPL, BSD and other licenses (though the Python license is unsuitable for anything other than Python - see http://wiki.python.org/moin/PythonSoftwareFoundationLicenseFaq) A good solution would be multiple-licensing. You state that the code is (for example) triple-licensed under the GPL, LGPL and BSD licenses. One lawyer I talked to (who could not understand why I wanted to open-source any code), claimed that the MIT license is better written (legally) to protect the author from acquiring legal liability. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: libxml2 and mindom
ankit wrote: I am parsing xml file using libxml2 and for navigating the document object tree I want to use minidom. Is it possible. Can anyone give me any example for the same ? Try libxml2dom [1] if you want to use a minidom-style API on documents parsed by libxml2. Recent namespace discussions notwithstanding, it should mostly behave itself to your satisfaction. You should even be able to import libxml2dom nodes into minidom, if you really need minidom for some reason, but this isn't extensively tested. Paul [1] http://www.python.org/pypi/libxml2dom -- http://mail.python.org/mailman/listinfo/python-list
Re: numarray :: multiplying all the elements in 1d array
Mandus wrote: Tue, 20 Dec 2005 19:32:13 +0530 skrev Suresh Jeevanandam: Hi all, Lets say I have an array: from numarray import * a = array([ 6, 7, 8, 9, 10, 11, 12]) I want to multiply out all the elements and get the result. r = 1.0 for i in a: r = r*i Is there any faster, efficient way of doing this. You can use multiply.reduce(a) (multiply is a function imported from numarray). With regular python you can also do: from operator import mul reduce(mul,a) This work even when 'a' is a plain python list. Actually, they'll both work with a plain python list. Multiply.reduce is much faster (see below) when operating on arrays, but somewhat slower when operating on lists. I'd guess from the overhead of converting the list to an array. -tim a = na.arange(10) l = range(10) t0 = time.clock(); na.multiply.reduce(a); print time.clock() - t0 0 0.00388960049392 t0 = time.clock(); na.multiply.reduce(l); print time.clock() - t0 0 0.042208716471 t0 = time.clock(); reduce(mul, a); print time.clock() - t0 0 0.0943455103931 t0 = time.clock(); reduce(mul, l); print time.clock() - t0 0 0.0146099574108 -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing engineering symbols
On Tue, 20 Dec 2005 23:28:12 +0100, Fredrik Lundh [EMAIL PROTECTED] wrote:
Suresh Jeevanandam wrote:
I want to convert a string to float value. The string contains
engineering symbols.
For example,
s = '12k'
I want some function which would return 12000
function(s)
= 12000.0
I searched the web, but could not find any function.
how about:
SI_prefixes = {
'Y':24, 'Z':21, 'E':18, 'P':15, 'T':12, 'G':9, 'M':6, 'k':3,
'h':2, 'd':-1, 'c':-2, 'm':-3, u'\xb5':-6, 'u':-6, 'n':-9, 'p':-12,
'f':-15, 'a':-18, 'z':-21, 'y':-24
}
def myfloat(str):
try:
exp = SI_prefixes[str[-1]]
return float(str[:-1]) * 10**exp
except KeyError:
return float(str)
?
Nit: why not move 10** out of myfloat into SI_prefixes
(i.e., just retrieve precalculated factors)?
Nit_2: No twinge of conscience shadowing str? ;-)
Regards,
Bengt Richter
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Re: coverting EST to PST
On 21 Dec 2005 03:15:47 -0800, Narendra
[EMAIL PROTECTED] wrote:
Hi All,i got a problem. I need to convert time from EST standard to PSTstandard.Thu, 15 Dec 2005 09:24:19 -0500 to PST
Quick and dirty, might not work for times at the end of DST
import time
from email import Utils
def tconv(t):
... t1 = Utils.mktime_tz(Utils.parsedate_tz(t))
... return time.ctime(t1 -(8*60*60)) + ' -0800'
tconv('Thu, 15 Dec 2005 09:24:19 -0500')
'Thu Dec 15 06:24:19 2005 -0800'
Failing that, google for python converting timezones
HTH :)
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Re: How to check if a string is an int?
On Wed, 21 Dec 2005 05:15:23 -0800, bonono wrote: Steven D'Aprano wrote: If you really wanted to waste CPU cycles, you could do this: s = 1579 for c in s: if not c.isdigit(): print Not an integer string break else: # if we get here, we didn't break print Integer %d % int(s) but notice that this is wasteful: first you walk the string, checking each character, and then the int() function has to walk the string again, checking each character for the second time. Wasteful enough that there is a specific built-in function to do just this ? Well, let's find out, shall we? from time import time # create a list of known int strings L_good = [str(n) for n in range(100)] # and a list of known non-int strings L_bad = [s + x for s in L_good] # now let's time how long it takes, comparing # Look Before You Leap vs. Just Do It def timer_LBYL(L): t = time() for s in L_good: if s.isdigit(): n = int(s) return time() - t def timer_JDI(L): t = time() for s in L_good: try: n = int(s) except ValueError: pass return time() - t # and now test the two strategies def tester(): print Time for Look Before You Leap (all ints): %f \ % timer_LBYL(L_good) print Time for Look Before You Leap (no ints): %f \ % timer_LBYL(L_bad) print Time for Just Do It (all ints): %f \ % timer_JDI(L_good) print Time for Just Do It (no ints): %f \ % timer_JDI(L_bad) And here are the results from three tests: tester() Time for Look Before You Leap (all ints): 2.871363 Time for Look Before You Leap (no ints): 3.167513 Time for Just Do It (all ints): 2.575050 Time for Just Do It (no ints): 2.579374 tester() Time for Look Before You Leap (all ints): 2.903631 Time for Look Before You Leap (no ints): 3.272497 Time for Just Do It (all ints): 2.571025 Time for Just Do It (no ints): 2.571188 tester() Time for Look Before You Leap (all ints): 2.894780 Time for Look Before You Leap (no ints): 3.167017 Time for Just Do It (all ints): 2.822160 Time for Just Do It (no ints): 2.569494 There is a consistant pattern that Look Before You Leap is measurably, and consistently, slower than using try...except, but both are within the same order of magnitude speed-wise. I wondered whether the speed difference would be different if the strings themselves were very long. So I made some minor changes: L_good = [1234567890*200] * 2000 L_bad = [s + x for s in L_good] tester() Time for Look Before You Leap (all ints): 9.740390 Time for Look Before You Leap (no ints): 9.871122 Time for Just Do It (all ints): 9.865055 Time for Just Do It (no ints): 9.967314 Hmmm... why is converting now slower than checking+converting? That doesn't make sense... except that the strings are so long that they overflow ints, and get converted automatically to longs. Perhaps this test exposes some accident of implementation. So I changed the two timer functions to use long() instead of int(), and got this: tester() Time for Look Before You Leap (all ints): 9.591998 Time for Look Before You Leap (no ints): 9.866835 Time for Just Do It (all ints): 9.424702 Time for Just Do It (no ints): 9.416610 A small but consistent speed advantage to the try...except block. Having said all that, the speed difference are absolutely trivial, less than 0.1 microseconds per digit. Choosing one form or the other purely on the basis of speed is premature optimization. But the real advantage of the try...except form is that it generalises to more complex kinds of data where there is no fast C code to check whether the data can be converted. (Try re-running the above tests with isdigit() re-written as a pure Python function.) In general, it is just as difficult to check whether something can be converted as it is to actually try to convert it and see whether it fails, especially in a language like Python where try...except blocks are so cheap to use. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
[EMAIL PROTECTED] wrote: How do I check if a string contains (can be converted to) an int? I want to do one thing if I am parsing and integer, and another if not. /David others already answered, this is just an idea def isNumber(n): ... import re ... if re.match(^[-+]?[0-9]+$, n): ... return True ... return False does not recognize 0x numbers, but this is easy to fix if wanted def isNumber(n): ... import re ... if re.match(^[-+]?[0-9A-Fa-f]+$, n): ... return True ... return False hth Daniel -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing engineering symbols
On Wed, 21 Dec 2005 19:10:21 +0530 in comp.lang.python, Suresh Jeevanandam [EMAIL PROTECTED] wrote: [re: SI prefixes] Exactly what I wanted. It would be nice if the standard float function takes care of these. No, it wouldn't. Regards, -=Dave -- Change is inevitable, progress is not. -- http://mail.python.org/mailman/listinfo/python-list
Re: type error on porting outfile.write
On Tue, 20 Dec 2005 22:11:01 -0500 in comp.lang.python, Eric McCoy [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] wrote: I ported my code from the development to application platform, I found a type error on a fileout statement: outfile.write(object.id +,) What is the type of object.id? I'm guessing an integer. The exception should tell you, e.g.: TypeError: unsupported operand type(s) for +: 'int' and 'str' If I'm right, you can do this: outfile.write(%d, % (object.id)) Or, more generally, outfile.write(%s, % object.id) or even (closer to the original code) outfile.write(str(object.id)+, ) Regards, -=Dave -- Change is inevitable, progress is not. -- http://mail.python.org/mailman/listinfo/python-list
Reducing import try/except boilerplate
Several standard library modules (e.g., cPickle/pickle, cStringIO/StringIO, threading/dummy_threading) have versions which may not be available on all platforms, and pure Python fallbacks that work on any platform Python supports. Flicking through the latest version of the Python Cookbook, I noticed many recipes that included module fallback suggestions along the lines of: try: import cPickle as pickle except ImportError: import pickle try: import threading except ImportError import dummy_threading as threading That seems rather verbose for something that isn't that uncommon (these module all expose the same API, so just give me one of them in this order of preference). So what about: import cPickle or pickle as pickle import threading or dummy_threading as threading # 'as' clause required since Python can't guess the name the programmer wants Also: from threading or dummy_threading import Thread # No 'as' clause needed since the module name isn't bound Insomnia-induced-random-ideas-are-fun-'ly yours, Nick. -- Nick Coghlan | [EMAIL PROTECTED] | Brisbane, Australia --- http://www.boredomandlaziness.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Easiest way to calculate number of character in string
P. Schmidt-Volkmar [EMAIL PROTECTED] writes:
Hi there,
I have a string in which I want to calculate how often the character ';'
occurs. If the character does not occur 42 times, the ; should be added so
the 42 are reached.
My solution is slow and wrong:
for Position in range (0, len(Zeile)):
if Zeile[Position]==';': AnzahlSemikolon = AnzahlSemikolon +1
if AnzahlSemikolon 42:
for Zaehler in range(AnzahlSemikolon, 42):
Zeile = Zeile + ';'
Dreckskram = Dreckskram +1
How can this be achieved easily?
Thanks,
Pascal
What about this:
Zaehler += ';'*max(0,42-Zaehler.count(';'))
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Re: Easiest way to calculate number of character in string
Ove Svensson [EMAIL PROTECTED] writes:
P. Schmidt-Volkmar [EMAIL PROTECTED] writes:
Hi there,
I have a string in which I want to calculate how often the character ';'
occurs. If the character does not occur 42 times, the ; should be added
so
the 42 are reached.
My solution is slow and wrong:
for Position in range (0, len(Zeile)):
if Zeile[Position]==';': AnzahlSemikolon = AnzahlSemikolon +1
if AnzahlSemikolon 42:
for Zaehler in range(AnzahlSemikolon, 42):
Zeile = Zeile + ';'
Dreckskram = Dreckskram +1
How can this be achieved easily?
Thanks,
Pascal
What about this:
Zaehler += ';'*max(0,42-Zaehler.count(';'))
Sorry, should have been
Zeile += ';'*max(0,42-Zeile.count(';'))
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Re: Which Python web framework is most like Ruby on Rails?
In Karrigell the scripts are executed in a namespace prepared by the framework, with HTTP environment, form data, the functions and exceptions for authentication, session management, redirection etc. I suppose that this falls into the first category above, modules (that) are designed to run linked together in a shared address space ; the link between the framework and the scripts is certainly much tighter than between a web server and a CGI script Pierre -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kent == Kent Johnson [EMAIL PROTECTED] writes: Kent [Karrigell is GPL'ed] Unfortunately this makes it impossible for Kent me to consider using Karrigell in my work. I recently needed a Kent stand-alone web server for a small in-house project that might Kent possibly be distributed to business partners or become a product Kent some day. I chose CherryPy in part because its license allows Kent this. I would have considered Karrigell if it had a different Kent license. None of this really matters, you know. The GPL only requires that you share your source code if you _distribute_ your modifications. Since you make your modifications exclusively for your own (your company's) use, you are not required to share anything. Thus the whole debate is pretty much moot if I am not much mistaken. Martin -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using Mailcrypt+GnuPG http://www.gnupg.org iEYEARECAAYFAkOpbaUACgkQYu1fMmOQldUR/QCffOi9bYnmUeEcT8zdvF60voah cy4AoIb69dAv6dr6WmpaIZPipq1xZbF0 =/eTj -END PGP SIGNATURE- -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Ben == Ben Sizer [EMAIL PROTECTED] writes: Ben Unfortunately, that doesn't really satisfy the GPL's concerns. Ben The work arguably contains or is derived from Karrigell, which Ben is explicitly covered in section 2b of the GPL. If you start Ben excluding key clauses from the GPL, then there's little point Ben using it. You will also notice that section 2b of the GPL only applies to works that are published or distributed, and if a company bases its web site on Karrigell or any other GPL'ed web framework but does not share the code with anyone, it cannot be considered to be published nor distributed. Hence the GPL is a perfectly fine license for this kind of use. Martin -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.1 (GNU/Linux) Comment: Using Mailcrypt+GnuPG http://www.gnupg.org iEYEARECAAYFAkOpb34ACgkQYu1fMmOQldUApQCgxPvp3ozRGo+/J5kJlY+htd4T F/IAoLBlMz0Z9eamIDqsInaa4bPyxgyd =UXUa -END PGP SIGNATURE- -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
On Wed, 21 Dec 2005 16:39:19 +0100, Daniel Schüle wrote: [EMAIL PROTECTED] wrote: How do I check if a string contains (can be converted to) an int? I want to do one thing if I am parsing and integer, and another if not. /David others already answered, this is just an idea def isNumber(n): ... import re ... if re.match(^[-+]?[0-9]+$, n): ... return True ... return False This is just a thought experiment, right, to see how slow you can make your Python program run? *smiles* Jamie Zawinski: Some people, when confronted with a problem, think 'I know, I'll use regular expressions.' Now they have two problems. -- Steven. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Martin Christensen wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Kent == Kent Johnson [EMAIL PROTECTED] writes: Kent [Karrigell is GPL'ed] Unfortunately this makes it impossible for Kent me to consider using Karrigell in my work. I recently needed a Kent stand-alone web server for a small in-house project that might Kent possibly be distributed to business partners or become a product Kent some day. I chose CherryPy in part because its license allows Kent this. I would have considered Karrigell if it had a different Kent license. None of this really matters, you know. The GPL only requires that you share your source code if you _distribute_ your modifications. Since you make your modifications exclusively for your own (your company's) use, you are not required to share anything. Thus the whole debate is pretty much moot if I am not much mistaken. In the text you quoted I said, a small in-house project that might possibly be distributed to business partners or become a product some day. Sounds like distribution to me. Kent -- http://mail.python.org/mailman/listinfo/python-list
Newbie: adding string values to a list?
Hi All, Sorry for the influx of newbie questions -- I'm trying to figure these things out on my own before bothering the community, but a lot of bits and pieces are escaping me at the moment. I'm retrieving a result set from an SQLite db (using the APSW module) and I want to add the value from one of the fields in the result set to a list. My current code looks something like: result = [] for name in cursor.execute(SELECT name, address FROM contacts ORDER BY name): result.extend(name) print result For reasons I (obviously) don't understand, the name values get broken up into each individual letter of the values in the name field in the result list. So, if the table contained records: Fred Dave When I print result I get: ['F','r','e','d','D','a','v','e'] What I'm looking for is: ['Fred','Dave'] Can anyone give me some advice on what I'm doing wrong? Many thanks and much warmth, planetthoughtful -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: adding string values to a list?
planetthoughtful wrote:
result = []
for name in cursor.execute(SELECT name, address FROM contacts ORDER BY
name):
result.extend(name)
print result
For reasons I (obviously) don't understand, the name values get
broken up into each individual letter of the values in the name field
in the result list.
Try interactive mode and it should be obvious:
result = []
result.extend('Fred')
result
['F', 'r', 'e', 'd']
result.append('Fred')
result
['F', 'r', 'e', 'd', 'Fred']
result.extend(['Fred'])
result
['F', 'r', 'e', 'd', 'Fred', 'Fred']
help(result.extend)
Help on built-in function extend:
extend(...)
L.extend(iterable) -- extend list by appending elements from the
iterable
in case it isn't obvious, the elements of a string are the individual
characters, so the extend method will append the individual characters. Use
the append method to put a single string on the end of a list.
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Re: Newbie: adding string values to a list?
You need to use result.append(...) instead of result.extend(...) (Been stumped with that myself too, several times, when I was still a newby... Except was using the operator '+=' I think) cheers, --Tim -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: adding string values to a list?
planetthoughtful wrote: Hi All, Sorry for the influx of newbie questions -- I'm trying to figure these things out on my own before bothering the community, but a lot of bits and pieces are escaping me at the moment. I'm retrieving a result set from an SQLite db (using the APSW module) and I want to add the value from one of the fields in the result set to a list. My current code looks something like: result = [] for name in cursor.execute(SELECT name, address FROM contacts ORDER BY name): result.extend(name) print result For reasons I (obviously) don't understand, the name values get broken up into each individual letter of the values in the name field in the result list. So, if the table contained records: Fred Dave When I print result I get: ['F','r','e','d','D','a','v','e'] What I'm looking for is: ['Fred','Dave'] Can anyone give me some advice on what I'm doing wrong? Many thanks and much warmth, may be you can try result.append() instead of result.extend() and read about their difference in the manual. but for this particular case you may get what you want with list comprehension, or simply limit the columns returned, as you are throwing away the addresses column anyway. -- http://mail.python.org/mailman/listinfo/python-list
Re: Which Python web framework is most like Ruby on Rails?
Martin Christensen wrote: Kent == Kent Johnson [EMAIL PROTECTED] writes: Kent [Karrigell is GPL'ed] Unfortunately this makes it impossible for Kent me to consider using Karrigell in my work. I recently needed a Kent stand-alone web server for a small in-house project that might Kent possibly be distributed to business partners or become a product Kent some day. I chose CherryPy in part because its license allows Kent this. I would have considered Karrigell if it had a different Kent license. None of this really matters, you know. The GPL only requires that you share your source code if you _distribute_ your modifications. Since you make your modifications exclusively for your own (your company's) use, you are not required to share anything. Thus the whole debate is pretty much moot if I am not much mistaken. Did you read anything Kent wrote? Specifically: project that might possibly be distributed to business partners or become a porduct some day. -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to use python to unit test C++ code?
[EMAIL PROTECTED] wrote: Is it possible to use python to unit test C++ code? If yes, is there any example available? If I had to use python to test C++ code, I'd use the Boost python library: http://www.boost.org/libs/python/doc/ to expose my C++ classes, and write the unittests in python after importing the wrapped C++ code. Note, you did ask if it was possible. Is it advisable? That's another question. All the best, Keir. -- http://mail.python.org/mailman/listinfo/python-list
memory usage of a specific function
hi, i need to find out the memory usage of a specific function that i use in my program. this function does some recursive calculations and i want my program to display the amount of memory the function used to calculate a specific value. thx -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie: adding string values to a list?
planetthoughtful wrote: Hi All, Sorry for the influx of newbie questions -- I'm trying to figure these things out on my own before bothering the community, but a lot of bits and pieces are escaping me at the moment. I'm retrieving a result set from an SQLite db (using the APSW module) and I want to add the value from one of the fields in the result set to a list. My current code looks something like: result = [] for name in cursor.execute(SELECT name, address FROM contacts ORDER BY name): result.extend(name) print result For reasons I (obviously) don't understand, the name values get broken up into each individual letter of the values in the name field in the result list. So, if the table contained records: Fred Dave When I print result I get: ['F','r','e','d','D','a','v','e'] What I'm looking for is: ['Fred','Dave'] Can anyone give me some advice on what I'm doing wrong? Many thanks and much warmth, planetthoughtful You want to 'append' the string to the list. extend is used to combine two lists. Since your string isn't a list Python tries to help and converts it to one for you. That's why you get the individual letters. result.append(name) -Larry Bates -- http://mail.python.org/mailman/listinfo/python-list
Re: How to check if a string is an int?
On Thu, 22 Dec 2005 01:41:34 +1100 in comp.lang.python, Steven D'Aprano [EMAIL PROTECTED] wrote: [...] Well, let's find out, shall we? [...] A small but consistent speed advantage to the try...except block. Having said all that, the speed difference are absolutely trivial, less than 0.1 microseconds per digit. Choosing one form or the other purely on the basis of speed is premature optimization. Or maybe on which actually works. LBYL will fail to recognize negative numbers, e.g. def LBYL(s): if s.isdigit(): return int(s) else: return 0 def JDI(s): try: return int(s) except: return 0 test = '15' print LBYL(test), JDI(test) #- 15 15 test = '-15' print LBYL(test), JDI(test) #- 0 -15 But the real advantage of the try...except form is that it generalises to more complex kinds of data where there is no fast C code to check whether re: Generalization, apropos a different thread regarding the % operator on strings. In Python, I avoid using the specific type format conversions (such as %d) in favor of the generic string conversion (%s) unless I need specific field width and/or padding or other formatting, e.g. for p in range(32): v = 1p print %2u %#010x : %-d % (p,v,v) Regards, -=Dave -- Change is inevitable, progress is not. -- http://mail.python.org/mailman/listinfo/python-list
Re: Easiest way to calculate number of character in string
On 21 Dec 2005 15:57:35 +0100, Ove Svensson [EMAIL PROTECTED] wrote:
Ove Svensson [EMAIL PROTECTED] writes:
P. Schmidt-Volkmar [EMAIL PROTECTED] writes:
Hi there,
I have a string in which I want to calculate how often the character ';'
occurs. If the character does not occur 42 times, the ; should be added
so
the 42 are reached.
My solution is slow and wrong:
for Position in range (0, len(Zeile)):
if Zeile[Position]==';': AnzahlSemikolon = AnzahlSemikolon +1
if AnzahlSemikolon 42:
for Zaehler in range(AnzahlSemikolon, 42):
Zeile = Zeile + ';'
Dreckskram = Dreckskram +1
How can this be achieved easily?
Thanks,
Pascal
What about this:
Zaehler += ';'*max(0,42-Zaehler.count(';'))
Sorry, should have been
Zeile += ';'*max(0,42-Zeile.count(';'))
I think You don't need the max
for n in xrange(-3,4): print '%3s: %r'%(n, n*';')
...
-3: ''
-2: ''
-1: ''
0: ''
1: ';'
2: ';;'
3: ';;;'
I.e.,
Zeile += ';'*(42-Zeile.count(';'))
should work, since a string is a sequence type and
http://docs.python.org/lib/typesseq.html
Says
Operation ResultNotes
...
s * n , n * s n shallow copies of s concatenated(2)
...
(2)
Values of n less than 0 are treated as 0 (which yields an empty sequence of
the same type as s). ...
I guess it might be nice to mention this in help(str) also, to publish a useful
fact better.
Maybe under str.__mul__ ?
Regards,
Bengt Richter
--
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Re: Is it possible to use python to unit test C++ code?
sylcheung Is it possible to use python to unit test C++ code? If yes, sylcheung is there any example available? Yes, it's quite possible. Some people even do it. ;-) As for examples, take a look at Python's own test suite. Much of the code it contains actually tests modules written in C, which is near enough to C++ for our purposes. For example, consider that the math module is a thin wrapper around bits of standard C89 math functions. The test_math.py script then exercises that code. So, you'll have to wrap your C++ library to make it available in Python (check out SWIG and/or Boost and/or Python's Extending and Embedding documentation), then write test cases. For that, look at the unittest and doctest modules that come with Python as well as the third-party py.test package. Skip -- http://mail.python.org/mailman/listinfo/python-list
Re: libxml2 and mindom
Hi Paul, I checked for it and here are my comments on it: libxml2dom has Alpha release . So there may be some bugs in it. In our project we cant take risk to move back after deciding for one. Thanks for your reply. I checked some other options like libgdome2. Can you make some comments on that? The reason for using minidom is its simplicity for traversing document tree. And also I want schema support in the package along with minidom support. Can you provide any other option(package) which would suffice this requirement. As far as I know no other package instead of libxml2 provides schema support. Am I right. Please clear me. I would be thankful to you -- http://mail.python.org/mailman/listinfo/python-list
Re: Raw images
That did the trick, I can now remove the bad tag statement, and it all works just nicely. Thank you very much! -- http://mail.python.org/mailman/listinfo/python-list
