Re: "no module named kivy" import error in ubuntu 14.04
In a message of Sun, 16 Aug 2015 22:05:29 -0700, rurpy--- via Python-list write s: >So I eventually found the kivy docs on their website where they >list prerequisite packages for installing kivy on ubuntu. I'll >translate those to hopefully the equivalent fedora package names, >install them, reinstall kivy, and get a working kivy install. > >The point here that all the above is a LONG way from what was >was posted here: "just type 'pip install kivy' and pip will take >care of everything". > >I hope someday Python gets a decent packaging/distribution story. Can you post what one should do with modern Fedora distributions, so we can tell the kivy-devs and they can update that webpage? Laura -- https://mail.python.org/mailman/listinfo/python-list
Re: Old DbaseV DOS Programmer wants to step over to new/actual modern program software
For building new programs using free software, I currently like a mix of Qt, Python, C++ and various open source SQL databases (MySQL, PostGreSQL). I have found QtCreator an easy IDE to use in such cases, I don't really like Eclipse. But it requires a heavy knowledge of C++, which is not an easy language, if you want to use Qt directly. PyQt works for smaller projects, I've used it with http://eric-ide.python-projects.org/ in the past. A few things you need to ask yourself: - How much time do I have? - Who are my users, what OS/systems do they use? I like Qt because it allows me to create programs for all kinds of operating systems. - How do I want to distribute my software? Is it a problem if a user is able to read the souce code? - How well do I really know Dbase V? What do I want to do the same and what differently? My dad worked with Dbase III/IV/V for years, but learned how to program it by changing the autogenerated code, which is a horrible way to learn programming and leads to very bad habbits. - What kind of programs are you trying to make? There also exist a lot of more specialized solutions, like http://www.4d.com/, which might suit your needs, if you're looking for a dBase replacement. Cheers Adriaan Renting| Email: rent...@astron.nl Software Engineer Radio Observatory ASTRON | Phone: +31 521 595 100 (797 direct) P.O. Box 2 | GSM: +31 6 24 25 17 28 NL-7990 AA Dwingeloo | FAX: +31 521 595 101 The Netherlands| Web: http://www.astron.nl/~renting/ >>> On 16-8-2015 at 20:40, Vladimir Ignatov wrote: > On Sun, Aug 16, 2015 at 1:11 PM, Rustom Mody wrote: > >>> I have some ideas in mind like Java with (ECLIPS) because it is very > popular, it is the most widely used and can get tutorials and videos all over > the internet. >>> I've read a lot of good things about Python, that it is much easier but too > complicate to define what to choose, >>> at the first place witch version 2.x or 3.x, a lot of IDE's to choose from, > beside of that witch IDE with what pluggin. > > Hi, > > I am using python for years but still curious about best IDE to suggest > newbies. > IMHO - too many choices with no clear winner and each with its own flaws. > For me two crucial features are: good autocompletion and ability to > step over code in debugger. > I'd try Eclipse+PyDev first and then additionally check PyCharm ($$$) > for comparison (to see how "best free" compares to "good commercial") > > > Vladimir > > https://itunes.apple.com/us/app/python-code-samples/id1025613117 -- https://mail.python.org/mailman/listinfo/python-list
Re: -2146826246 in win32com.client for empty #N/A cell in Excel
On Sun, Aug 16, 2015 at 7:27 PM, Albert-Jan Roskam wrote: > > > > > Date: Sun, 16 Aug 2015 09:53:32 -0700 > > Subject: -2146826246 in win32com.client for empty #N/A cell in Excel > > From: sven.bo...@gmail.com > > To: python-list@python.org > > > > > > Anyone know how to handle "#N/A" in Excel from win32com.client. > > > > I'm extracting data from an Excel file using win32com.client. Everything > works fine except for when the value "#N/A" is entered in excel. An empty > cell. I assumed I do something as > > > > if ws.Cells(r, c).Value is None: > > ... > > > > But that doesn't seem to work. When I debug the piece of code while > handling #N/A in a cell the type of the cell according to win32com.client > is int and the value in the cell is -2146826246. Chances are small just > this number will appear in Excel, but it looks dirty to depend on that > value to decide if a cell is empty. Looked around the net for a solution, > but nothing came up so far. > > > > Anyone knows how to handle a "#N/A" cell in Excel in the proper way? > > > > Regards, > > Sven > > -- > > https://mail.python.org/mailman/listinfo/python-list > > > Hello, > > Does that number happen to be -1 * sys.maxint? > > Regards, > Albert-Jan > > > On python 3.x sys.maxint is gone... sys.maxsize is a lot larger on Windows 64bit (same laptop I run the code on). Regards, Sven -- https://mail.python.org/mailman/listinfo/python-list
Error in IDLE
I just installed python. But I'm unable to access IDLE after several clicks and double clicks. I even tried repairing by trying to reinstall but I have the same issue. -- https://mail.python.org/mailman/listinfo/python-list
Re: Error in IDLE
In a message of Sat, 15 Aug 2015 16:42:13 +0100, Henry Quansah writes: >I just installed python. But I'm unable to access IDLE after several clicks >and double clicks. I even tried repairing by trying to reinstall but I have >the same issue. > What version of Python have you installed? How did you install it? What Operating system are you using? What error messages (if any) do you get when you try to run Idle? Paste the whole traceback into your mail, if you get one. Laura -- https://mail.python.org/mailman/listinfo/python-list
Python 3 sort() problem
# first: works fine x = [1, 2, 4, 2, 1, 3] x = list(set(x)) x.sort() print(x) # output: 1, 2, 3, 4 # second: why x became None ?? x = [1, 2, 4, 2, 1, 3] x = list(set(x)).sort() print(x) # output: None I know that sort() returns None, but I guess that it would be returned x that was sorted. Why so? -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 sort() problem
> > I know that sort() returns None, but I guess that it would be returned x > that was sorted. Why so? if it returned a sorted list it might lead some people to believe it did not modify the oridinal list which would lead to a ton of confusion for new users. -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 sort() problem
On 08/17/2015 01:42 PM, Владислав wrote: x = [1, 2, 4, 2, 1, 3] x = list(set(x)).sort() print(x) /# output: None/ I know that sort() returns None, but I guess that it would be returned x that was sorted. Why so? If sort() returns None, than the following: x = list(set(x)).sort() is equivalent to writing: x = None So I don't really understand your question, I'm sorry... Cheers, Fabien -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 sort() problem
On 17/08/2015 12:42, Владислав wrote: # first: works fine x = [1, 2, 4, 2, 1, 3] x = list(set(x)) x.sort() print(x) /# output: 1, 2, 3, 4 /# second: why x became None ?? x = [1, 2, 4, 2, 1, 3] x = list(set(x)).sort() print(x) /# output: None/ I know that sort() returns None, but I guess that it would be returned x that was sorted. Why so?/ A set is created from x. This is converted to a list. You call sort() and assign the return value from that, None, to x. You will see exactly the same thing above if you do:- x = x.sort() -- My fellow Pythonistas, ask not what our language can do for you, ask what you can do for our language. Mark Lawrence -- https://mail.python.org/mailman/listinfo/python-list
Re: Python 3 sort() problem
On Monday, August 17, 2015 at 7:32:08 PM UTC+5:30, Владислав wrote: > # first: works fine > x = [1, 2, 4, 2, 1, 3] > x = list(set(x)) > x.sort() > print(x) # output: 1, 2, 3, 4 > > # second: why x became None ?? > x = [1, 2, 4, 2, 1, 3] > x = list(set(x)).sort() > print(x) # output: None > I know that sort() returns None, but I guess that it would be returned x that > was sorted. Why so? > > > Maybe you want sorted? >>> x = [4,2,1,3] >>> sorted(x) [1, 2, 3, 4] [The list(set(..)) is probably for removing duplicates. Right? Which you seem to have worked out it seems? So best when asking questions to focus on one issue at a time] -- https://mail.python.org/mailman/listinfo/python-list
Who is using littletable?
littletable is a little module I knocked together a few years ago, found it sort of useful, so uploaded to SF and PyPI. The download traffic at SF is very light, as I expected, but PyPI shows > 3000 downloads in the past month! Who *are* all these people? In my own continuing self-education, it is interesting to see overlap in the basic goals in littletable, and the much more widely known pandas module (with littletable being more lightweight/freestanding, not requiring numpy, but correspondingly not as snappy). I know Adam Sah uses (or at least used to use) littletable as an in-memory product catalog for his website Buyer's Best friend (http://www.bbfdirect.com/). Who else is out there, and what enticed you to use this little module? -- Paul -- https://mail.python.org/mailman/listinfo/python-list
Re: Who is using littletable?
Some of the PyPI traffic is for mirrors. In addition to our official mirrors, some people/companies set up their own mirrors and suck down everything. Laura -- https://mail.python.org/mailman/listinfo/python-list
Python Mobile development using kivy
Hi All, I am using Python2.7 version, while developing basic app using kivy, I am getting following error : dev@synechron-desktop-156:~/myDev/mobile_app$ cat main.py from kivy import app from kivy.app import App from kivy.uix.label import Label class MyApp(App): def build(self): return Label(text='Hello world') if __name__ == '__main__': MyApp().run() dev@synechron-desktop-156:~/myDev/mobile_app$ python main.py [INFO ] [Logger ] Record log in /home/dev/.kivy/logs/kivy_15-08-17_0.txt [INFO ] [Kivy] v1.9.0 [INFO ] [Python ] v2.7.5 (default, Aug 9 2015, 22:40:01) [GCC 4.4.3] [INFO ] [Factory ] 173 symbols loaded [INFO ] [Image ] Providers: img_tex, img_dds, img_gif, img_pygame (img_pil, img_ffpyplayer ignored) Traceback (most recent call last): File "main.py", line 1, in from kivy import app File "/usr/local/lib/python2.7/site-packages/kivy/app.py", line 324, in from kivy.uix.widget import Widget File "/usr/local/lib/python2.7/site-packages/kivy/uix/widget.py", line 167, in from kivy.graphics.transformation import Matrix File "/usr/local/lib/python2.7/site-packages/kivy/graphics/__init__.py", line 89, in from kivy.graphics.instructions import Callback, Canvas, CanvasBase, \ File "kivy/graphics/vbo.pxd", line 7, in init kivy.graphics.instructions (kivy/graphics/instructions.c:14003) File "kivy/graphics/compiler.pxd", line 1, in init kivy.graphics.vbo (kivy/graphics/vbo.c:5112) File "kivy/graphics/shader.pxd", line 5, in init kivy.graphics.compiler (kivy/graphics/compiler.c:2863) File "kivy/graphics/texture.pxd", line 3, in init kivy.graphics.shader (kivy/graphics/shader.c:10293) File "kivy/graphics/fbo.pxd", line 5, in init kivy.graphics.texture (kivy/graphics/texture.c:29967) File "kivy/graphics/fbo.pyx", line 84, in init kivy.graphics.fbo (kivy/graphics/fbo.c:7065) ImportError: /usr/local/lib/python2.7/site-packages/kivy/graphics/opengl.so: undefined symbol: glBlendEquationSeparate dev@synechron-desktop-156:~/myDev/mobile_app$ More information : I have installed kivy,pygame and cython as well: dev@synechron-desktop-156:~/myDev/mobile_app$ python Python 2.7.5 (default, Aug 9 2015, 22:40:01) [GCC 4.4.3] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import kivy [INFO ] [Logger ] Record log in /home/dev/.kivy/logs/kivy_15-08-17_1.txt [INFO ] [Kivy] v1.9.0 [INFO ] [Python ] v2.7.5 (default, Aug 9 2015, 22:40:01) [GCC 4.4.3] >>> import pygame >>> import cython >>> -- https://mail.python.org/mailman/listinfo/python-list
RE: return types from library api wrappers
> Current practice is a NamedTuple for python code or the C equivalent. I > forget the C name, but I believe it is used by os.stat Hi Terry, Ok, that is what I will go with. Thanks for the confirmation, jlc -- https://mail.python.org/mailman/listinfo/python-list
Re: python command not working
On Friday, August 14, 2015 at 6:13:37 AM UTC-5, sam.h...@gmail.com wrote: > On Wednesday, April 22, 2009 at 8:36:21 AM UTC+1, David Cournapeau wrote: > > On Wed, Apr 22, 2009 at 4:20 PM, 83nini <83n...@gmail.com> wrote: > > > Hi guys, > > > > > > I'm new to python, i downloaded version 2.5, opened windows (vista) > > > command line and wrote "python", this should take me to the python > > You can do it easily by adding the Python path (in my case C:\Python27) to > your system PATH. > This thread is > 6 years old, OP has probably gone on to other things... -- https://mail.python.org/mailman/listinfo/python-list
Re: Python Mobile development using kivy
In a message of Mon, 17 Aug 2015 09:35:12 -0700, reetesh nigam writes: >Hi All, > >I am using Python2.7 version, while developing basic app using kivy, I am >getting following error : > >dev@synechron-desktop-156:~/myDev/mobile_app$ cat main.py >from kivy import app >from kivy.app import App >from kivy.uix.label import Label >class MyApp(App): >def build(self): >return Label(text='Hello world') >if __name__ == '__main__': >MyApp().run() > >dev@synechron-desktop-156:~/myDev/mobile_app$ python main.py >[INFO ] [Logger ] Record log in /home/dev/.kivy/logs/kivy_15-08-17_0.txt >[INFO ] [Kivy] v1.9.0 >[INFO ] [Python ] v2.7.5 (default, Aug 9 2015, 22:40:01) >[GCC 4.4.3] >[INFO ] [Factory ] 173 symbols loaded >[INFO ] [Image ] Providers: img_tex, img_dds, img_gif, img_pygame >(img_pil, img_ffpyplayer ignored) > Traceback (most recent call last): > File "main.py", line 1, in > from kivy import app > File "/usr/local/lib/python2.7/site-packages/kivy/app.py", line 324, in > > from kivy.uix.widget import Widget > File "/usr/local/lib/python2.7/site-packages/kivy/uix/widget.py", line 167, > in > from kivy.graphics.transformation import Matrix > File "/usr/local/lib/python2.7/site-packages/kivy/graphics/__init__.py", > line 89, in > from kivy.graphics.instructions import Callback, Canvas, CanvasBase, \ > File "kivy/graphics/vbo.pxd", line 7, in init kivy.graphics.instructions > (kivy/graphics/instructions.c:14003) > File "kivy/graphics/compiler.pxd", line 1, in init kivy.graphics.vbo > (kivy/graphics/vbo.c:5112) > File "kivy/graphics/shader.pxd", line 5, in init kivy.graphics.compiler > (kivy/graphics/compiler.c:2863) > File "kivy/graphics/texture.pxd", line 3, in init kivy.graphics.shader > (kivy/graphics/shader.c:10293) > File "kivy/graphics/fbo.pxd", line 5, in init kivy.graphics.texture > (kivy/graphics/texture.c:29967) > File "kivy/graphics/fbo.pyx", line 84, in init kivy.graphics.fbo > (kivy/graphics/fbo.c:7065) > ImportError: /usr/local/lib/python2.7/site-packages/kivy/graphics/opengl.so: > undefined symbol: glBlendEquationSeparate >dev@synechron-desktop-156:~/myDev/mobile_app$ If you get undefined opengl errors, it is usually caused by an old version of opengl, and the error you got is common. This is a puzzling error that most often happens when compiling under i386 for the old libGL. Given that the symbol is present in libGL and that compilation works under amd64, this shouldn't be happening. But for some reason it does. If a newer version of opengl.so doesn't fix your problem, post a bug report here: https://github.com/kivy/kivy/issues or discuss it on #kivy on freenode Laura -- https://mail.python.org/mailman/listinfo/python-list
Re: "no module named kivy" import error in ubuntu 14.04
On Monday, August 17, 2015 at 10:35:48 AM UTC+5:30, rurpy wrote: > I hope someday Python gets a decent packaging/distribution story. You are in august company | The final question was about what he (Guido) hates in Python. "Anything to do | with package distribution", he answered immediately. There are problems | with version skew and dependencies that just make for an "endless | mess". He dreads it when a colleague comes to him with a "simple Python | question". Half the time it is some kind of import path problem and | there is no easy solution to offer. >From https://mail.python.org/pipermail/python-list/2015-July/694818.html Quoting https://lwn.net/Articles/651967/ -- https://mail.python.org/mailman/listinfo/python-list
Re: Error in IDLE
On 8/15/2015 11:42 AM, Henry Quansah wrote: I just installed python. But I'm unable to access IDLE after several clicks and double clicks. I even tried repairing by trying to reinstall but I have the same issue. If you just installed 3.5.0rc1 on Windows, look for my fix message on or about the 14th. -- Terry Jan Reedy -- https://mail.python.org/mailman/listinfo/python-list
Re: memory control in Python
On Saturday, August 15, 2015 at 11:56:22 AM UTC-7, Laura Creighton wrote: > If the problem is that Python is using too much memory, then PyPy may > be able to help you. PyPy is an alternative implementation of Python, > and by defaiult uses a minimark garbage collector. > https://pypy.readthedocs.org/en/release-2.4.x/garbage_collection.html > > You will have to write your own bindings for the CPLEX C library, though, > using cffi. http://cffi.readthedocs.org/en/latest/overview.html (since > the bindings you have assume the CPython ref counting gc). > > But if your C program is itself using too much memory, then this probably > won't help. > > Discuss this more on pypy-...@python.org or the #pypy channel on freenode. > People on pypy-dev would appreciate not getting libreoffice spreadsheet > attachments but just the figures as plain text. > > Laura Hi, Laura, Thank you for the advice. I see that some people also mention that PyPy may save some speed and memory than CPython. But since I am working on an optimization problem, I wonder whether PyPy would support NumPy and Scipy. In which progress have this integration been done? -- https://mail.python.org/mailman/listinfo/python-list
Re: memory control in Python
In a message of Mon, 17 Aug 2015 11:40:32 -0700, Ping Liu writes: >> Discuss this more on pypy-...@python.org or the #pypy channel on freenode. >> People on pypy-dev would appreciate not getting libreoffice spreadsheet >> attachments but just the figures as plain text. >> >> Laura > >Hi, Laura, >Thank you for the advice. I see that some people also mention that PyPy may >save some speed and memory than CPython. But since I am working on an >optimization problem, I wonder whether PyPy would support NumPy and Scipy. In >which progress have this integration been done? >-- >https://mail.python.org/mailman/listinfo/python-list Significant progress has been made to support NumPy. SciPy, no. Ask on pypy-dev and/or freenode to find out if the NumPy features you need are done yet. Laura -- https://mail.python.org/mailman/listinfo/python-list
Re: How to model government organization hierarchies so that the list can expand and compress
Perhaps most jointly parented governmental organizations are functionally, collaborative "projects" (not organizations) which my model handles. But thanks to Laura, will not assume there are none, or will never be any in the future, so will use adjacent list (see fast response times documented in explainedextended.com article below), but created new 1:M table to handle multiple parents. ORGANIZATION - 1. organization_Id (PK) 2. organization_name ORGANIZATION_HIERARCHY (1:M) -- 1. organization_Id (FK to above table) - can have multiple parents 2. adjacent_parent_id (FK to above table) Thanks to all for the assistance. Led me to some great articles including http://explainextended.com/2009/09/24/adjacency-list-vs-nested-sets-postgresql/ Alex -- https://mail.python.org/mailman/listinfo/python-list
Re: How to rearrange array using Python?
Den 2015-07-31 skrev Martin Schöön : > Den 2015-07-31 skrev Thomas 'PointedEars' Lahn : >> Mark Lawrence wrote: >>> >>> I'm not absolutely certain but I think you're into what's known as a >>> constraint satisfaction problem, in which case this >>> https://pypi.python.org/pypi/python-constraint/1.2 is as good a starting >>> point as any. If I'm wrong we'll soon get told :) >> >> It is a CSP indeed, and as I was reading the OP I was thinking of SWI- >> > Thanks guys, I will follow up on the CSP lead. It is not something I > have prior experience of so it will be interesting. > Brief progress report (just to tell you that your advice has been 'absorbed'). I have been reading a bit, here is one example. http://kti.ms.mff.cuni.cz/~bartak/constraints/index.html Interesting stuff but sometimes head-spinning -- I don't always follow the lingo. I have also downloaded and installed Python-Constraint. It works as advertised as long as I replicate the examples found at: http://labix.org/python-constraint I can even scale some of the examples. Creating my own examples has proven harder -- in part because the documentation is minimalistic but also because I have not tried very hard. We have, finally, got some nice summer weather here... I have tried my hand at a *very* basic room placement problem. It works apart from the fact that I have not figured out how to tell the solver there are limits to how many occupants each room can house. Yesterday I started on a basic Kenken example. I need to experiment a little to find a way to add the needed division and subtraction constraints. I haven't given this much thought yet. Today I found Numberjack: http://numberjack.ucc.ie/ It seems better documented than Python-Constraint but that is all I know. Anyone with experience of Numberjack? In summary: I am having fun using ipython and org-mode for emacs. I am not making much headway but then I don't have a dead-line :-) /Martin -- https://mail.python.org/mailman/listinfo/python-list
Re: memory control in Python
Hi, Dieter, If I move from Python to Jython or IronPython, do I need to retool whatever I have done? If so, that may take quite a long time. This may make the reimplementation impossible. -- https://mail.python.org/mailman/listinfo/python-list
why does id(multiprocessing.Process.start) == id(multiprocessing.Process.start)?
using Python 2.7.9, I get the following: >>> id(multiprocessing.Process.start) == id(multiprocessing.Process.start) True But on the other hand: >>> multiprocessing.Process.start is multiprocessing.Process.start False I thought that these two expressions were equivalent. Can somebody help me to understand what's going on here? -- https://mail.python.org/mailman/listinfo/python-list
Python Import Hooks and __main__
Hi, following up on this thread on StackOverflow http://stackoverflow.com/questions/16515347/python-import-hooks-and-main does somebody has a great idea how to manage this? The issue at hand is, that I would like to apply a specific import hook right from the beginning of the interpreter run (here, a simple test case), i.e. also affecting the import/exec of the module __main__. Hook: https://github.com/srkunze/fork/blob/2e7ecd4b0a/fork.py#L429 Dirty Magic to get things running: https://github.com/srkunze/fork/blob/2e7ecd4b0a/fork.py#L425 Best, Sven -- https://mail.python.org/mailman/listinfo/python-list
Re: why does id(multiprocessing.Process.start) == id(multiprocessing.Process.start)?
On Monday, August 17, 2015 at 3:24:22 PM UTC-7, alex@gmail.com wrote: > using Python 2.7.9, I get the following: > > >>> id(multiprocessing.Process.start) == id(multiprocessing.Process.start) > True > > But on the other hand: > > >>> multiprocessing.Process.start is multiprocessing.Process.start > False > > I thought that these two expressions were equivalent. Can somebody help me to > understand what's going on here? Sorry I completely mistype that. It was supposed to read: >>> id(multiprocessing.Process.is_alive) == id(multiprocessing.Process.start) True >>> multiprocessing.Process.is_alive is multiprocessing.Process.start False -- https://mail.python.org/mailman/listinfo/python-list
Re: why does id(multiprocessing.Process.start) == id(multiprocessing.Process.start)?
On Mon, Aug 17, 2015 at 3:25 PM, wrote: > > Sorry I completely mistype that. It was supposed to read: > > >>> id(multiprocessing.Process.is_alive) == > id(multiprocessing.Process.start) > True > What is going on here is that it get multiprocessing.Process.is_alive, computes the id of it, then throws away the value of multiprocessing.Process.is_alive. It then does the same thing for multiprocessing.Process.start, where by it happens to reuse the id of the first value. > >>> multiprocessing.Process.is_alive is multiprocessing.Process.start > False > In this case, the "is" operator keeps both references around during its call, and therefore they will get different ids. The rules for the id is that they are only guaranteed unique during the lifespan of both objects. Also, generally, you do not want to use id or is for much of anything unless you really know what you are doing - generally, you just want == instead. > > -- > https://mail.python.org/mailman/listinfo/python-list > -- https://mail.python.org/mailman/listinfo/python-list
Re: why does id(multiprocessing.Process.start) == id(multiprocessing.Process.start)?
On Mon, Aug 17, 2015 at 4:57 PM, Chris Kaynor wrote: > The rules for the id is that they are only guaranteed unique during the > lifespan of both objects. Also, generally, you do not want to use id or is > for much of anything unless you really know what you are doing - generally, > you just want == instead. In the case of "is", I don't agree. "is" is a useful operator and is not prone to user error like "id". The only caveat is that one should understand the distinction between "is" and "==". -- https://mail.python.org/mailman/listinfo/python-list
Re: "no module named kivy" import error in ubuntu 14.04
On 08/17/2015 01:52 AM, Laura Creighton wrote: > In a message of Sun, 16 Aug 2015 22:05:29 -0700, rurpy--- via Python-list > writes: >> So I eventually found the kivy docs on their website where they >> list prerequisite packages for installing kivy on ubuntu. I'll >> translate those to hopefully the equivalent fedora package names, >> install them, reinstall kivy, and get a working kivy install. Actually, right after I posted, I saw a Fedora-specific list of packages on the kivy website. However, after I installed them and reinstalled kivy I still got the same set of missing package warning that I got before. And hoping that the packages just enabled optional features I tried running the simple "hello-world" program from their website. It died horribly: | [CRITICAL] [Window ] Unable to find any valuable Window provider at all! | egl_rpi - ImportError: cannot import name 'bcm' | File "/usr/lib64/python3.4/site-packages/kivy/core/__init__.py", line 57, in core_select_lib and | x11 - ImportError: No module named 'kivy.core.window.window_x11' | File "/usr/lib64/python3.4/site-packages/kivy/core/__init__.py", line 57, in core_select_lib | fromlist=[modulename], level=0) | [CRITICAL] [App ] Unable to get a Window, abort. >> The point here that all the above is a LONG way from what was >> was posted here: "just type 'pip install kivy' and pip will take >> care of everything". >> >> I hope someday Python gets a decent packaging/distribution story. > > Can you post what one should do with modern Fedora distributions, so > we can tell the kivy-devs and they can update that webpage? Unfortunately I have no idea what one should do. The standard response in this group is that pip knows, hence I don't need to. I just wanted to point out the fallacy of that. -- https://mail.python.org/mailman/listinfo/python-list
Re: memory control in Python
On Tue, Aug 18, 2015 at 8:09 AM, Ping Liu wrote: > If I move from Python to Jython or IronPython, do I need to retool whatever I > have done? If so, that may take quite a long time. This may make the > reimplementation impossible. You're not moving from Python to something else; you're moving from CPython to something else. It's like moving from Borland's C compiler to Watcom's C compiler - all your code should still run unchanged. There will be differences, but the bulk of your code shouldn't need changing. With Python interpreters, the usual difference is extension libraries - CPython can call on a bunch of things implemented in native code, Jython can call on a bunch of things implemented in Java, etc. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
execute commands as su on remote server
execute commands as su on remote server Postby hariram » Mon Aug 17, 2015 4:02 am Needed: I need to execute commands after doing su to other user on remote server(not sudo which doesn't require password) how i can achieve this using python? I googled and came to know that its not possible, so just for confirmation asking again, is it possible ? Already Tried: Tried paramiko that's too not working. -- https://mail.python.org/mailman/listinfo/python-list
Re: execute commands as su on remote server
On Tue, Aug 18, 2015 at 12:57 PM, wrote: > I need to execute commands after doing su to other user on remote server(not > sudo which doesn't require password) how i can achieve this using python? > I googled and came to know that its not possible, so just for confirmation > asking again, is it possible ? Ultimately, this isn't a Python question, it's a systems administration one. You want a way to execute commands as a specific user, triggering them remotely. There are basically two ways you can do this: either you provide some form of credentials (this is what sudo does), or you elevate the entire management process. The latter option is far FAR easier (running it as root if you might need to go to any different user, or as that specific user if you'll only ever use one), but then you have to ensure, in some way, that your Python program can't be compromised. Python has nothing to do with any of this. If you want to manage elevation using sudo, Python can invoke sudo in a subprocess. If you want to elevate the Python process and then simply invoke something directly, Python won't even be aware of it. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
Re: why does id(multiprocessing.Process.start) == id(multiprocessing.Process.start)?
On Mon, Aug 17, 2015, at 18:25, alex.fl...@gmail.com wrote: > Sorry I completely mistype that. It was supposed to read: > > >>> id(multiprocessing.Process.is_alive) == id(multiprocessing.Process.start) > True > > >>> multiprocessing.Process.is_alive is multiprocessing.Process.start > False Try this: is_alive = multiprocessing.Process.is_alive start = multiprocessing.Process.start id(is_alive) == id(start) If (as I believe it will) this ends up being false, this shows that it's an issue of object lifespan with the values of the expression being temporary method wrappers. From some testing, on my machine on CPython 2.7 this appears to work for any method of any class written in python. While you fixed the typo, it is instructive to note that, as in your original example, multiprocessing.Process.start is multiprocessing.Process.start is *also* False, which would not be the case if the method wrapper were a permanent object. -- https://mail.python.org/mailman/listinfo/python-list
Re: memory control in Python
Ping Liu writes: > If I move from Python to Jython or IronPython, do I need to retool whatever I > have done? If so, that may take quite a long time. This may make the > reimplementation impossible. As Chris already pointed out, you are still using Python -- i.e. the base language does not change. However, extension packages, such as "NumPy", might not be supported. If you are using extension packages, carefully check whether they are supported for a different Python implementation before you decide a switch. -- https://mail.python.org/mailman/listinfo/python-list
Re: memory control in Python
In a message of Tue, 18 Aug 2015 10:13:57 +1000, Chris Angelico writes: >On Tue, Aug 18, 2015 at 8:09 AM, Ping Liu wrote: >> If I move from Python to Jython or IronPython, do I need to retool whatever >> I have done? If so, that may take quite a long time. This may make the >> reimplementation impossible. > >You're not moving from Python to something else; you're moving from >CPython to something else. It's like moving from Borland's C compiler >to Watcom's C compiler - all your code should still run unchanged. >There will be differences, but the bulk of your code shouldn't need >changing. With Python interpreters, the usual difference is extension >libraries - CPython can call on a bunch of things implemented in >native code, Jython can call on a bunch of things implemented in Java, >etc. > >ChrisA Unless, as I expect, what he has done uses Numpy and or SciPy a lot. Enthought is no longer supporting NumPy for IronPython (and it never worked all that well, anyway, I am told ... but I never used it myself). Even the maintainer of Jnumeric (which is trying to do Numeric not NumPy) thinks the Jnumeric project should die. http://stackoverflow.com/questions/18832169/numpy-analog-for-jython We already know that Ping has a really big C extension he needs to work with -- CPLEX, and well, here he may be in luck as there are java versions of CPLEX and there is something called the CPLEX/Concert .NET API which may -- I never tried this -- let him work with Iron Python. But that is one lirary. If he has many more C extensions he needs to use, then this could mean retooling them. Laura -- https://mail.python.org/mailman/listinfo/python-list
