Elisa Media Center 0.5.33 Release
Dear Python users, The Elisa team is happy to announce the release of Elisa Media Center 0.5.33, code-named Surrounded. Elisa is a cross-platform and open-source Media Center written in Python. It uses GStreamer [1] for media playback and pigment [2] to create an appealing and intuitive user interface. This release is a lightweight release, meaning it is pushed through our automatic plugin update system. Additionally a windows installer is available for download on our website. This installer fixes various crash at startup problems. As usual, for users running a version of Elisa = 0.5.27, the upgrade to 0.5.33 should be done automatically via the plugin repository. As usual, tarballs are provided for distribution packagers. A complete list of the issues fixed can be found at: http://bugs.launchpad.net/elisa/+milestone/0.5.33 This is also summarised in the (attached) release notes. Installers and sources can be downloaded from http://elisa.fluendo.com/download/ Bug reports and feature requests are welcome at http://bugs.launchpad.net/elisa/+filebug Have a media-centered evening, Olivier, for the Elisa team [1] http://www.gstreamer.net/ [2] https://code.fluendo.com/pigment/trac Elisa 0.5.33 Surrounded = This is Elisa 0.5.33, thirty-third release of the 0.5 branch. Bugs fixed since 0.5.32: - 337788: The core depends on plugins - 341199: [win32] Elisa crashes at startup if gstreamer is in the path - 341686: [win32] Elisa crashes at startup if GST_PLUGIN_PATH is set - 251606: [win32] elisa.exe should be able to open a debug console - 263697: installing elisa breaks the unit tests of unrelated Python packages - 304433: Black screen at startup without feedback - 318691: Drag'n dropped pictures cannot be rotated - 330491: [linux] Cannot play TV Shows with question marks in their filename - 347182: Elisa 0.5.32 tarballs README shows older version of pigment Download You can find source releases of Elisa on the download page: http://elisa.fluendo.com/download Elisa Homepage More details can be found on the project's website: http://elisa.fluendo.com Support and Bugs We use Launchpad for bug reports and feature requests: https://bugs.launchpad.net/elisa/+filebug Developers All code is in a Bazaar branch and can be checked out from there. It is hosted on Launchpad: https://code.launchpad.net/elisa Contributors to this release: - Anna Wojdel - David McLeod - Florian Boucault - Guillaume Emont - Jesús Corrius - Lionel Martin - Marc Garcia - Maxwell Young - Olivier Tilloy - Philippe Normand -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Wing IDE 3.1.8 released
Hi, Wingware has released version 3.1.8 of Wing IDE, a bug-fix release for all three product levels of Wing IDE. *Release Highlights* This release includes the following: * Fixed problems seen with Subversion 1.4+ * Properly ignore settrace exception on x64 systems * Fixed perforce submit for some Perforce versions * Show meaningful error when debug a main file within a zip or egg * Fixed cursor color in search fields when editor background is not white * Use .chm file on Windows for python manual, when available * Upgraded Wing's private copy of Python to 2.5.4 (includes security patches) * About 5 other bug fixes: see the change log for details: http://wingware.com/pub/wingide/3.1.8/CHANGELOG.txt *Downloads* Wing IDE Professional and Wing IDE Personal are commercial software and require a license to run. A free trial license can be obtained directly from the product when launched. Wing IDE Pro 3.1.8http://wingware.com/downloads/wingide/3.1 Wing IDE Personal 3.1.8 http://wingware.com/downloads/wingide-personal/3.1 Wing IDE 101 3.1.8http://wingware.com/downloads/wingide-101/3.1 *About Wing IDE* Wing IDE is an integrated development environment for the Python programming language. It provides powerful debugging, editing, code intelligence, testing, and search capabilities that reduce development and debugging time, cut down on coding errors, and make it easier to understand and navigate Python code. Wing IDE is available in three product levels: Wing IDE Professional is the full-featured Python IDE, Wing IDE Personal offers a reduced feature set at a low price, and Wing IDE 101 is a free simplified version designed for teaching entry level programming courses with Python. System requirements are Windows 2000 or later, OS X 10.3.9 or later for PPC or Intel (requires X11 Server), or a recent Linux system (either 32 or 64 bit). Wing IDE 3.1 supports Python versions 2.0.x through 2.5.x. *New Features in Wing 3.1* This release adds the following features not found in Wing 3.0.x: * Support for zip archives * Support for pkg_resources name spaces and eggs * Support for doctest and nose style unit tests (*) * Scan for sys.path changes such as those used in buildout * How-To and support for Google App Engine * Inline context appropriate templates/snippets integrated with autocompleter (*) * Word list driven auto-completion in non-Python files (**) * Quick navigation to files and symbols by typing a fragment (**) * Improved support for Stackless Python * Preference to strip trailing white space on save * Display gi_running and gi_frame for generators * Improved code analysis for Python 2.5 * Other minor features and bug fixes not found in Wing 3.0.x (*)'d items are available in Wing IDE Professional only. (**)'d items are available in Wing IDE Personal or Professional only. Please see the change log for a detailed list of changes: http://wingware.com/pub/wingide/3.1.8/CHANGELOG.txt *Purchasing and Upgrading* Wing 3.1 is a free upgrade for all Wing IDE 3.0 and 3.1 users. Any 2.x license sold after May 2nd 2006 is free to upgrade; others cost 1/2 the normal price to upgrade. Upgrade a 2.x license: https://wingware.com/store/upgrade Purchase a 3.x license:https://wingware.com/store/purchase -- The Wingware Team Wingware | Python IDE Advancing Software Development www.wingware.com -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
ETS 3.2.0 Released
Hello, I'm pleased to announce that Enthought Tool Suite (ETS) version 3.2.0 has been tagged and released! Source distributions (.tar.gz) have been uploaded to PyPi, and Windows binaries will be follow shortly. A full install of ETS can be done using Setuptools via a command like: easy_install -U ets[nonets] = 3.2.0 NOTE 1: Users of an old ETS release will need to first uninstall prior to installing the new ETS. NOTE 2: If you get a 'SandboxViolation' error, simply re-run the command again -- it may take multiple invocations to get everything installed. (This error appears to be a long-standing incompatibility between numpy.distutils and setuptools.) Please see below for a list of what's new in this release. What Is ETS? === The Enthought Tool Suite (ETS) is a collection of components developed by Enthought and the open-source community, which we use every day to construct custom scientific applications. It includes a wide variety of components, including: * an extensible application framework * application building blocks * 2-D and 3-D graphics libraries * scientific and math libraries * developer tools The cornerstone on which these tools rest is the Traits package, which provides explicit type declarations in Python; its features include initialization, validation, delegation, notification, and visualization of typed attributes. More information on ETS is available from the development home page: http://code.enthought.com/projects/index.php Changelog = ETS 3.2.0 is a feature-added update to ETS 3.1.0, including numerous bug-fixes. Some of the notable changes include: Chaco - * Domain limits - Mappers now can declare the limits of their valid domain. PanTool and ZoomTool respect these limits. (pwang) * Adding hide_grids parameter to Plot.img_plot() and Plot.contour_plot() so users can override the default behavior of hiding grids. (pwang) * Refactored examples to declare a Demo object so they can be be run with the demo.py example launcher. (vibha) * Adding chaco.overlays package with some canned SVG overlays. (bhendrix) * DragZoom now can scale both X and Y axes independently corresponding to the mouse cursor motion along the X and Y axes (similar to the zoom behavior in Matplotlib). (pwang) * New Examples: * world map (bhendrix) * more financial plots (pwang) * scatter_toggle (pwang) * stacked_axis (pwang) * Fixing the chaco.scales TimeFormatter to use the built-in localtime() instead of the one in the safetime.py module due to Daylight Savings Time issues with timedelta. (r23231, pwang) * Improved behavior of ScatterPlot when it doesn't get the type of metadata it expects in its selections and selection_masks metadata keys (r23121, pwang) * Setting the .range2d attribute on GridMapper now properly sets the two DataRange1D instances of its sub-mappers. (r23119, pwang) * ScatterPlot.map_index() now respects the index_only flag (r23060, pwang) * Fixed occasional traceback/bug in LinePlot that occurred when data was completely outside the visible range (r23059, pwang) * Implementing is_in() on legends to account for padding and alignment (caused by tools that move the legend) (r23052, bhendrix) * Legend behaves properly when there are no plots to display (r23012, judah) * Fixed LogScale in the chaco.scales package to correctly handle the case when the length of the interval is less than a decade (r22907, warren.weckesser) * Fixed traceback when calling copy_traits() on a DataView (r22894, vibha) * Scatter plots generated by Plot.plot() now properly use the auto coloring feature of Plot. (r22727, pwang) * Reduced the size of screenshots in the user manual. (r22720, rkern) Mayavi -- * 17, 18 March, 2009 (PR): * NEW: A simple example to show how one can use TVTK’s visual module with mlab. [23250] * BUG: The size trait was being overridden and was different from the parent causing a bug with resizing the viewer. [23243] * 15 March, 2009 (GV): * ENH: Add a volume factory to mlab that knows how to set color, vmin and vmax for the volume module [23221]. * 14 March, 2009 (PR): * API/TEST: Added a new testing entry point: ‘mayavi -t’ now runs tests in separate process, for isolation. Added enthought.mayavi.api.test to allow for simple testing from the interpreter [23195]...[23200], [23213], [23214], [23223]. * BUG: The volume module was directly importing the wx_gradient_editor leading to an import error when no wxPython is available. This has been tested and fixed. Thanks to Christoph Bohme for reporting this issue. [23191] * 14 March, 2009 (GV): * BUG: [mlab]: fix positioning for titles [23194], and opacity for titles and text [23193]. * ENH: Add the mlab_source attribute on all objects created by mlab, when possible [23201], [23209]. * ENH: Add a message to help the first-time user, using the new banner feature of the IPython shell view [23208]. * 13 March, 2009 (PR): * NEW/API: Adding a
[ANN]: circuits 1.1.1 - a Lightweight, Event driven Framework with a strong Component Architecture.
Hi, I'm pleased to announce the 1.1.1 release of circuits: http://trac.softcircuit.com.au/circuits/ This is a minor bug fix release. == Links == Home Page:: http://trac.softcircuit.com.au/circuits/ Mailing list:: http://groups.google.com.au/group/circuits-users/ Download:: http://trac.softcircuit.com.au/circuits/downloads/ Library Reference:: http://trac.softcircuit.com.au/circuits/export/tip/docs/html/index.html cheers James -- -- Problems are solved by method -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
User athentication in Python/wxpython
Hi friends, I need to do one client side application which is for uploading files to remote server with ude ftp. only authenticated users are permitted to access it, how can i pass the ftp connection in different py files? Help would be thankful -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the difference between generating a value and returning a value?
On Mar 24, 3:10 pm, John Yeung gallium.arsen...@gmail.com wrote: In my opinion, it's especially poor form to use the term generate in that context when the language you are using to explain these concepts has very specific things called generators. In its defense, I'm pretty sure 'How to Think Like a Computer Scientist' predates the introduction of generators to Python. -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
On 24 Mrz., 05:30, Steve Holden st...@holdenweb.com wrote: No, there is no certification for Python. Maybe in the future... O'Reilly School of Technology have plans to offer a Python certification. But I have to write the courses first :) If you're done with it I'd additionally suggest the honory title of a VIPP: Very Important Python Programmer. VIPPs receive a sticker with a Python logo and are immediately spotted this way by their numerous fans. Regards -- http://mail.python.org/mailman/listinfo/python-list
Re: Query regarding Python sybase module
On Tue, 24 Mar 2009 09:53:02 +0530 (IST) srinivasan srinivas sri_anna...@yahoo.co.in wrote: Hi, Does Sybase Python driver module implement multiple result sets from a single command? Could anyone guide e in finding answer for this? The site http://python-sybase.sourceforge.net/sybase/ has the documentation for the python sybase module. See the documentation of the Cursor object to find out how to use multiple result sets. -- kushal -- http://mail.python.org/mailman/listinfo/python-list
Re: how to convert from Decimal('1.23456789') to Decimal('1.234')
On Mon, 23 Mar 2009 17:19:48 -0700, Mensanator wrote: And it also gives different results to my function: my function rounds to places decimal places, yours to i digits. Very different things. Yeah, I know all about that. I work in Environmental Remediation. That's real science, where rounding to decimal places is strictly forbidden, significant digits must be preserved. That means rounding to digits. Okay, so in other words you solved your problem rather than the OP's problem. People other than the OP read these threads. Do you want to give people the impression that quantize is the only option? The only option for what? Solving the OP's problem, or your problem, or some other problem? How many different problems are we going to solve in this thread? At the very least, when taking a detour to solve a different problem, say so, and point out why your problem is a more interesting/useful problem to solve. Do you know what kind of hoops I have to jump through to get Access or Excel to round properly when doing unit conversion? I feel your pain. So surely you don't want to give the impression that all Decimal is good for is emulating Excel? That's a non sequitor. It does not follow that just because I sympathize with your difficulties with Excel, that I therefore want to give the impression that Decimal is only good for emulating Excel. Surely you're not so maive that you think dividing by 1000 simply moves the decimal point three places? Of course it does, if you're using real numbers. Computers have real numbers? You don't have to use computers to divide by 1000. As difficult as it is to believe, throughout history people have done mathematical calculations without the use of computing devices. If you're using floats, no, not quite, there are rounding issues involved, and underflow. And that's why we have Decimal, right? I'm sure that the Decimal standard wasn't invented just so people can divide by 1000. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
On Mar 24, 7:15 am, Gabriel Genellina gagsl-...@yahoo.com.ar
wrote:
En Mon, 23 Mar 2009 21:37:14 -0300, R. David Murray
rdmur...@bitdance.com escribió:
Steve Holden st...@holdenweb.com wrote:
Sreejith K wrote:
Try and write an example that shows the problem in fifteen lines or
less. Much easier for us to focus on the issue that way.
import os
def read(length, offset):
os.chdir('/mnt/gfs_local/')
snap = open('mango.txt_snaps/snap1/0','r')
snap.seek(offset)
data = snap.read(length)
print data
read(4096,0)
This code shows what actually happens inside the code I've written.
This prints the 4096 bytes from the file '0' which is only 654 bytes.
When we run the code we get the whole file. That's right. I also get
it. But when this read() function becomes the file class read()
function in fuse, the data printed is not the whole but only a few
lines from the beginning.
This is confusing. I presume you to mean that when you make this
function a method of some class it stops operating correctly?
But I am not sure.
I am still struggling to understand your problem. Sorry,it's just a
language thing. If we take our time we will understand each other in the
end.
You may be asking this question for pedagogical reasons, Steve, but
in case not...the OP is apparently doing a 'less ' where is
the name of a file in a fuse filesystem (that is, a mounted filesystem
whose back end is some application code written by the OP).
[...]
There are several steps between that 'snap.read' and less displaying on
the terminal whatever bytes it got back from its read call in whatever
way it is less chooses to display them
And that's why everyone is asking for a *real* log. Assumptions like foo
must be 0 here aren't enough. One needs *evidence*: a log file showing
the value of foo right when it is used. Then, one can begin to infer
what happens -- first step would be to determine *which* layer is (or is
not) responsible for the misbehavior.
In this case, I'd like to see file.tell(), the requested size and the
returned data length, *right*at*the*read()*call*.
--
Gabriel Genellina
R. David Murray understood the problem very well. As you've said I
logged the data returned and see that it actually the complete file.
But the problem is when 'less'ing only two lines are displayed. So its
not regarding the read() of python. Usually in fuse filesystems (as in
some examples), when some file read occurs fuse catch it and calls the
python-fuse's read(length, offset) function. For small files (when we
read using 'less'), this will be usually the first block i.e 4096 with
offset 0. We return what we read from the read() method of fuse-
python. But when I return the data I read, a 'less' operation in my
fuse filesystem shows some lines only, even if the returned data is
the whole file.
In my implementation of fuse-filesystem when a read is called, instead
of returning the data read from the original file, I return the data
read from another file ('0') which resides in original-file__snaps/
snap1 directory (I use this directory to store the blocks of original
files when write occurs. So each file here would be 4096 bytes). I'm
doing this because I want to make snapshots of files so that I can
restore the older file easily. The problem occurs when reading this
file and returning the read data.
Some flush/release functions are there in fuse to properly close the
opened file. When reading (less) the original file without snapshots,
there is no issue. But when reading the snapshot instead, the problem
occurs. I open the snapshot file with the same modes as the original
file. Is there anything I should do after read() like the flush() as
for the original file ? I tried it, but no success...
Log when reading from snapshot
===
Read length: 4096 offset: 0
Snapshot 0 opened..
Snap read
===Data Begin===
Getting started -- pdb.set_trace()
To start, I'll show you the very simplest way to use the Python
debugger.
1. Let's start with a simple program, epdb1.py.
# epdb1.py -- experiment with the Python debugger, pdb
a = aaa
b = bbb
c = ccc
final = a + b + c
print final
2. Insert the following statement at the beginning of your Python
program. This statement imports the Python debugger module, pdb.
import pdb
3. Now find a spot where you would like tracing to begin, and
insert the following code:
pdb.set_trace()
===Data End
snap.tell(): 654
data size : 654
Original file flushed
Original file closed
data is the whole file, but 'less' gives only the two lines...
--
http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
Kay Schluehr ka..@gmx.net wrote: On 24 Mrz., 05:30, Steve Holden st...@holdenweb.com wrote: O'Reilly School of Technology have plans to offer a Python certification. But I have to write the courses first :) If you're done with it I'd additionally suggest the honory title of a VIPP: Very Important Python Programmer. VIPPs receive a sticker with a Python logo and are immediately spotted this way by their numerous fans. I like the idea, but I would suggest that the award be limited to the first 100 participants and that the title be: Very Important Python Early Responder - Hendrik -- http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
Thanx Max - your explanation sorted it :-), and a big thank you to everyone else also! From the various posts, Python considers any directory containing the __init__.py file to be a package. The top level package is the highest directory (closest to root) with a __init__.py file. Inter-package communication is not allowed unless the packages themselves are contained by a parent package. How does this relate to the site-packages folder? Is it a top level package for all installed packages? Let's say I have installed the Trac system which uses Genshi, they are both packages. They are also both installed at the same level and I know Trac uses Genshi to work. \Python25\Lib\site-packages does not contain a __init__.py file so it is not a package (i.e. not a parent package to Trac and Genshi) :0. -=- bearophile -=- Hi Bearophile, Thanx for taking the time to post a response but I am afraid I feel the need to point out that it is exactly this kind of response that I find un-helpful. It is neither constructive nor educational. It's a bit like saying If you don't know what a function is, then maybe you don't need it. ... have you tried having a single block of code? The point of people coming to these forums is to LEARN and share knowledge. Perhaps it's not the best solution for me right now but without trying it I won't know when or how to apply it as a solution. By the way, my project has about 50 files (modules) in it with a lot of shared code that could be used across other projects... seems as good a reason as any to try packages out ;-) Thanx anyway :) On 23 Mar, 18:57, bearophileh...@lycos.com wrote: CinnamonDonkey: what makes something a package? If you don't know what a package is, then maybe you don't need packages. In your project is it possible to avoid using packages and just use modules in the same directory? Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
On Mar 24, 7:59 am, Sreejith K sreejith...@gmail.com wrote: ... data is the whole file, but 'less' gives only the two lines... From this statement (that you are using less), it appears that you are redirecting sys.stdout to a file or similar - if that is the case, you may need to flush or close the output file before it picks up any changes. -- http://mail.python.org/mailman/listinfo/python-list
Re: udp package header
mete metebilgi...@gmail.com wrote: I got a problem. İ want to send udp package and get this package (server and clinet ). it's easy to python but i want to look the udp header how can i do ? There is pretty much nothing in a UDP packet header except from_address, to_address, from_port and to_port. You should already know to_address and to_port and socket.recv will give you the from_address and from_port socket.recvfrom(bufsize[, flags]) Receive data from the socket. The return value is a pair (string, address) where string is a string representing the data received and address is the address of the socket sending the data. -- Nick Craig-Wood n...@craig-wood.com -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
On Mar 24, 2:12 pm, Ant ant...@gmail.com wrote: On Mar 24, 7:59 am, Sreejith K sreejith...@gmail.com wrote: ... data is the whole file, but 'less' gives only the two lines... From this statement (that you are using less), it appears that you are redirecting sys.stdout to a file or similar - if that is the case, you may need to flush or close the output file before it picks up any changes. Yes, I did try a flush() and close on the file which is read, but the result is the same. I think when a read comes in fuse redirecting the actual path (original file) to some other file for reading causes some issues like this. It would be really helpful if someone help me clear this issue. The getattr() calls are actually called upon the original file (doing an os.lstat()). Does this make any effect on the 'less' output ? -- http://mail.python.org/mailman/listinfo/python-list
importing modules from alternate path
I'm trying with no succes to load modules from an alternate path. When
installing to default location (no --home specifed) everything works
as expected.
$ python setup.py install --home=~
running install
running build
running build_ext
running install_lib
running install_egg_info
Removing /home/voodoo/lib/python/PackageName-1.0-py2.6.egg-info
Writing /home/voodoo/lib/python/PackageName-1.0-py2.6.egg-info
$ printf import demo | PYTHONPATH=~ python
Traceback (most recent call last):
File stdin, line 1, in module
ImportError: No module named demo
$ printf import demo | PYTHONHOME=~ python
Traceback (most recent call last):
File stdin, line 1, in module
ImportError: No module named demo
Any idea why alternate path is not working?
- BEGIN OF setup.py
from distutils.core import setup, Extension
module1 = Extension('demo',
sources = ['demo.c'])
setup (name = 'PackageName',
version = '1.0',
description = 'This is a demo package',
ext_modules = [module1])
- END OF end setup.py
- BEGIN OF demo.c
#include Python.h
static PyObject* demo_bla(PyObject *self) {
return Py_BuildValue(i, 666);
}
- END OF demo.c
--
http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
On Mar 24, 1:50 am, Johannes Bauer dfnsonfsdu...@gmx.de wrote: Sebastian Bassi schrieb: No, there is no certification for Python. Maybe in the future... I'll hand out the Johannes Bauer Python Certificate of Total Awesomeness for anyone who can write a hello world in python and hands me $25000 in cash. This whole certified foobar programmer is complete crap IMHO. The above offer stands nontheless. Kind regards, Johannes -- Meine Gegenklage gegen dich lautet dann auf bewusste Verlogenheit, verlästerung von Gott, Bibel und mir und bewusster Blasphemie. -- Prophet und Visionär Hans Joss aka HJP in de.sci.physik 48d8bf1d$0$7510$54022...@news.sunrise.ch The Academy of Research into Science Education being a true leader in the field offers acclaimed accreditation for Python programmers. Those who pass our strict exams and pay our modest fees will earn our prestigious certification. Those who show promise can advance to our Winter Improve Python to Expert program, for an additional fee, and, be given expert tutoring to help you gain our exemplary A.R.S.E./W.I.P.E certification which is guaranteed to attract certain types of employers by its name alone. -- http://mail.python.org/mailman/listinfo/python-list
user site-packages, --prefix, --home and friends
I am very confused by PEP-370 per-user site-packages. It is not mentioned at all in the document about installing Python modules : http://docs.python.org/3.0/install/index.html. It seems that --home or --prefix already provide per-user site- packages capability. Can someone explain what are the differences and what is the best practice in various situations? Thanks, Carl -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
Sebastian Bassi schrieb: No, there is no certification for Python. Maybe in the future... I'll hand out the Johannes Bauer Python Certificate of Total Awesomeness for anyone who can write a hello world in python and hands me $25000 in cash. This whole certified foobar programmer is complete crap IMHO. The above offer stands nontheless. Kind regards, Johannes -- Meine Gegenklage gegen dich lautet dann auf bewusste Verlogenheit, verlästerung von Gott, Bibel und mir und bewusster Blasphemie. -- Prophet und Visionär Hans Joss aka HJP in de.sci.physik 48d8bf1d$0$7510$54022...@news.sunrise.ch -- http://mail.python.org/mailman/listinfo/python-list
What's the difference between generating a value and returning a value?
Taken from the url http://openbookproject.net/thinkCSpy/ch05.xhtml#index15 The built-in functions we have used, such as abs, pow, and max, have produced results. Calling each of these functions generates a value, which we usually assign to a variable or use as part of an expression. biggest = max(3, 7, 2, 5) x = abs(3 - 11) + 10 But so far, none of the functions we have written has returned a value. In this chapter, we are going to write functions that return values, which we will call fruitful functions, So what's the difference between generating a value and returning a value? -- http://mail.python.org/mailman/listinfo/python-list
how to get the summarized text from a given URL?
Is there any python library to solve the below problem? FOr the below URL : -- http://tinyurl.com/dzcwbg Summarized text is : --- By Roy Mark With sales plummeting and its smart phones failing to woo new customers, Sony Ericsson follows its warning that first quarter sales will be disappointing with the announcement that Najmi Jarwala, president of Sony Ericsson USA and head of ... ~~ Usually summarized text is a 2 to 3 line description of the URL which we usually obtain by fetching that html page , examining the content and figuring out short description from that html markup. ~ Are there any python libraries which give summarized text for a given url ? It is ok even if the library just gives intial two lines of text from the given URL Instead of summarization. -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the difference between generating a value and returning a value?
On Mon, Mar 23, 2009 at 03:12:19PM -0700, grocery_stocker wrote: So what's the difference between generating a value and returning a value? Well when you return, you would use the return keyword, I would imagine... I guess generating could mean many things, you can generate a value by operating on something, but I guess this does imply returning a value, because the function returning the value is generating a new value... But, I know for sure that when you return a value it is the information the function returns to the caller after operating on either no, or some arguments. Daniel. -- http://mail.python.org/mailman/listinfo/python-list
importing modules from alternate path
=?UTF-8?Q?Alexandru__Mo=C8=99oi?= brtz...@gmail.com wrote: I'm trying with no succes to load modules from an alternate path. When installing to default location (no --home specifed) everything works as expected. $ python setup.py install --home=~ running install running build running build_ext running install_lib running install_egg_info Removing /home/voodoo/lib/python/PackageName-1.0-py2.6.egg-info Writing /home/voodoo/lib/python/PackageName-1.0-py2.6.egg-info $ printf import demo | PYTHONPATH=~ python Traceback (most recent call last): File stdin, line 1, in module ImportError: No module named demo $ printf import demo | PYTHONHOME=~ python Traceback (most recent call last): File stdin, line 1, in module ImportError: No module named demo Any idea why alternate path is not working? Possibly because the package gets installed into ~/lib/python, but you haven't put that directory onto the PYTHONPATH. -- R. David Murray http://www.bitdance.com -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
Sreejith K sreejith...@gmail.com wrote: On Mar 24, 2:12 pm, Ant ant...@gmail.com wrote: On Mar 24, 7:59 am, Sreejith K sreejith...@gmail.com wrote: ... data is the whole file, but 'less' gives only the two lines... From this statement (that you are using less), it appears that you are redirecting sys.stdout to a file or similar - if that is the case, you may need to flush or close the output file before it picks up any changes. It's not a redirect to a file. Fuse calls the 'read' function on the class, the read function does a 'return' of the data, and fuse passes the data up through the OS layer to be the result of the 'read' call made by less. If you don't know what a fuse file system is, this all gets very confusing :) Yes, I did try a flush() and close on the file which is read, but the result is the same. I think when a read comes in fuse redirecting the actual path (original file) to some other file for reading causes some issues like this. It would be really helpful if someone help me clear this issue. The getattr() calls are actually called upon the original file (doing an os.lstat()). Does this make any effect on the 'less' output ? I'm afraid we are getting beyond my level of fuse-foo here. You'd probably be better off finding a fuse or even fuse-python mailing list and trying there. If it were me, I'd start logging everything I could (take a look at Python's 'logging' module to help you make that easy), and twidling things. What happens if you change what gets returned to lstat? What happens for various sizes and contents of the '0' file? What happens if you use 'cat -v' or hexdump instead of less to read the file? Run experiments until you gather enough clues to make a guess as to what is going on, then test your theory. Repeat until success :) -- R. David Murray http://www.bitdance.com -- http://mail.python.org/mailman/listinfo/python-list
Re: What's the difference between generating a value and returning a value?
Clearly, there's no difference, from the wording you quoted. He uses three words more or less interchangeably, produced, generated and returned. The distinction he's making is not between these words, but between the built-in functions, which are already returning values, and the ones that he has had the user write so far, that do not. DaveA grocery_stocker wrote: Taken from the url http://openbookproject.net/thinkCSpy/ch05.xhtml#index15 The built-in functions we have used, such as abs, pow, and max, have produced results. Calling each of these functions generates a value, which we usually assign to a variable or use as part of an expression. biggest = max(3, 7, 2, 5) x = abs(3 - 11) + 10 But so far, none of the functions we have written has returned a value. In this chapter, we are going to write functions that return values, which we will call fruitful functions, So what's the difference between generating a value and returning a value? -- http://mail.python.org/mailman/listinfo/python-list
Re: how to get the summarized text from a given URL?
Rama Vadakattu wrote: Is there any python library to solve the below problem? FOr the below URL : -- http://tinyurl.com/dzcwbg Summarized text is : --- By Roy Mark With sales plummeting and its smart phones failing to woo new customers, Sony Ericsson follows its warning that first quarter sales will be disappointing with the announcement that Najmi Jarwala, president of Sony Ericsson USA and head of ... ~~ Usually summarized text is a 2 to 3 line description of the URL which we usually obtain by fetching that html page , examining the content and figuring out short description from that html markup. ~ Are there any python libraries which give summarized text for a given url ? BeautifulSoup makes it easy to access parts of a web page. import urllib2 from BeautifulSoup import BeautifulSoup data = urllib2.urlopen(http://tinyurl.com/dzcwbg;).read() bs = BeautifulSoup(data) print bs.find(meta, dict(name=description))[content] It is ok even if the library just gives intial two lines of text from the given URL Instead of summarization. The problem is how you identify the summary. Different web sites will put it in different places using different markup. Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
On Tue, Mar 24, 2009 at 5:05 AM, CinnamonDonkey
cinnamondon...@googlemail.com wrote:
Thanx Max - your explanation sorted it :-), and a big thank you to
everyone else also!
From the various posts, Python considers any directory containing the
__init__.py file to be a package. The top level package is the highest
directory (closest to root) with a __init__.py file.
Inter-package communication is not allowed unless the packages
themselves are contained by a parent package.
How does this relate to the site-packages folder? Is it a top level
package for all installed packages?
Let's say I have installed the Trac system which uses Genshi, they
are both packages. They are also both installed at the same level and
I know Trac uses Genshi to work. \Python25\Lib\site-packages does
not contain a __init__.py file so it is not a package (i.e. not a
parent package to Trac and Genshi) :0.
Trac does not use relative imports to access genshi. When relative
imports are not used, python goes through sys.path list to find
modules (with a small exception made when absolute_imports are not
enabled, but that should be default in 2.7). The site-packages
directory is added to sys.path, so when trac executes something like
from genshi import some_module, python will look in site-packages,
among other directories, for a directory called genshi that contains
an __init__.py file.
When you execute a script, the directory of that script is
automatically added to sys.path, so with your example you could have
used absolute imports between subpack1 and subpack2, with the \App
directory performing the same function as site-packages (Gabriel's
suggestion). This is for your original version of the code when
main.py was under App.
Once you moved main.py outside of \App, running import sybpack2
would no longer work. You can, however, append directories to
sys.path, so by doing the following in main.py you could again allow
non-relative imports between subpack1 and subpack2:
import os
import sys
sys.path.append(os.path.realpath('App'))
- Max
--
http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
Top posting corrected for clarity. CinnamonDonkey cinnamondon...@googlemail.com wrote: On 23 Mar, 18:57, bearophileh...@lycos.com wrote: CinnamonDonkey: what makes something a package? If you don't know what a package is, then maybe you don't need packages. In your project is it possible to avoid using packages and just use modules in the same directory? Bye, bearophile Hi Bearophile, Thanx for taking the time to post a response but I am afraid I feel the need to point out that it is exactly this kind of response that I find un-helpful. It is neither constructive nor educational. It's a bit like saying If you don't know what a function is, then maybe you don't need it. ... have you tried having a single block of code? The point of people coming to these forums is to LEARN and share knowledge. Perhaps it's not the best solution for me right now but without trying it I won't know when or how to apply it as a solution. By the way, my project has about 50 files (modules) in it with a lot of shared code that could be used across other projects... seems as good a reason as any to try packages out ;-) Thanx anyway :) I think bearophile could have left out the first sentence, but otherwise his question is perfectly sensible. If you have a bunch of independent modules, then you don't need to put them in packages. Your example only showed one module file in each package...I understand now that was just for simplicity of the example, but we had no way of knowing that. We've had newbies come in and think they _need_ to put a module file into a subpackage even when they'd only have one module file per subdirectory and they don't really know what a package is...thus bearophile's (perhaps poorly phrased) question. Now that you know what packages are and what the restrictions on relative imports are, and you've told us that you have '50 modules' with a lot of shared code that 'could be used across other projects', perhaps you see why relative imports are generally discouraged. If you use only relative imports, the code _can't_ be shared across multiple projects, because all that project code would have to be in one monster package, and not be separate projects at all. So now you'll know better where it makes Pythonic (as opposed to C++) sense to use it and where not. -- R. David Murray http://www.bitdance.com -- http://mail.python.org/mailman/listinfo/python-list
install pyPgSQL on Windows for python 2.5
Hi, does anyone know how to install pyPgSQL on Windows? There is no package for Python 2.5 on Homepage: http://sourceforge.net/project/showfiles.php?group_id=16528package_id=20458release_id=423036 I've tried to install running: python setup.py install But getting errors python setup.py install - running install running build running build_py running build_ext error: Python was built with Visual Studio 2003; extensions must be built with a compiler than can generate compatible binaries. Visual Studio 2003 was not found on this system. If you have Cygwin installed, you can try compiling with MingW32, by passing -c mingw32 to setup.py. I've installed newest Visual C++ Studio 2008 from Microsoft, but still no luck Pet -- http://mail.python.org/mailman/listinfo/python-list
Unit testing frameworks
I am looking for a unit testing framework for Python. I am aware of nose, but was wondering if there are any others that will automatically find and run all tests under a directory hierarchy. Thanks, Ralph -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
On Mar 24, 4:45 pm, R. David Murray rdmur...@bitdance.com wrote: Sreejith K sreejith...@gmail.com wrote: On Mar 24, 2:12 pm, Ant ant...@gmail.com wrote: On Mar 24, 7:59 am, Sreejith K sreejith...@gmail.com wrote: ... data is the whole file, but 'less' gives only the two lines... From this statement (that you are using less), it appears that you are redirecting sys.stdout to a file or similar - if that is the case, you may need to flush or close the output file before it picks up any changes. It's not a redirect to a file. Fuse calls the 'read' function on the class, the read function does a 'return' of the data, and fuse passes the data up through the OS layer to be the result of the 'read' call made by less. If you don't know what a fuse file system is, this all gets very confusing :) Yes, I did try a flush() and close on the file which is read, but the result is the same. I think when a read comes in fuse redirecting the actual path (original file) to some other file for reading causes some issues like this. It would be really helpful if someone help me clear this issue. The getattr() calls are actually called upon the original file (doing an os.lstat()). Does this make any effect on the 'less' output ? I'm afraid we are getting beyond my level of fuse-foo here. You'd probably be better off finding a fuse or even fuse-python mailing list and trying there. If it were me, I'd start logging everything I could (take a look at Python's 'logging' module to help you make that easy), and twidling things. What happens if you change what gets returned to lstat? What happens for various sizes and contents of the '0' file? What happens if you use 'cat -v' or hexdump instead of less to read the file? Run experiments until you gather enough clues to make a guess as to what is going on, then test your theory. Repeat until success :) -- R. David Murray http://www.bitdance.com Thanks Murray, for your valuable opinions and suggestions. I'll try to log everything from now on and find out what happens inside. :) Surely I'll let you guys know what happened.. -- http://mail.python.org/mailman/listinfo/python-list
user site-packages, --prefix, --home and friends
Carl tg2.u...@gmail.com wrote: I am very confused by PEP-370 per-user site-packages. It is not mentioned at all in the document about installing Python modules : http://docs.python.org/3.0/install/index.html. It seems that --home or --prefix already provide per-user site- packages capability. Can someone explain what are the differences and what is the best practice in various situations? I'm by no means an authority, but by my reading of the PEP there are two major items that differentiate --user from --prefix and --home: automatic per-python-version installation, and handling of .pth files. As for best practice, I would say whichever one meets your needs. The PEP is addressing the needs of users who do not have root privs but who want to install packages via distutils in such a way that they will act as if they had been installed in the system site-packages directory. -- R. David Murray http://www.bitdance.com -- http://mail.python.org/mailman/listinfo/python-list
Re: file.read() doesn't read the whole file
It's not a redirect to a file. Fuse calls the 'read' function on the class, the read function does a 'return' of the data, and fuse passes the data up through the OS layer to be the result of the 'read' call made by less. By redirection I meant reading the snapshot file instead of the original file :). Sorry for making confusions -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
Hendrik van Rooyen wrote: I like the idea, but I would suggest that the award be limited to the first 100 participants and that the title be: Very Important Python Early Responder I'd pay good money for that if the 'I' could be customized to stand for Ignorant :) Daniel -- http://mail.python.org/mailman/listinfo/python-list
Bash-like brace expansion
Okay, I got fed up with there not being any (obvious) good examples of
how to do bash-like brace expansion in Python, so I wrote it myself.
Here it is for all to enjoy!
If anyone has any better solutions or any other examples of how to do
this, I'd be glad to hear from them.
#~ BraceExpand.py - Bash-like brace expansion in Python
#~ Copyright (C) 2009 peter.wal...@gmail.com
#~ This program is free software: you can redistribute it and/or
modify
#~ it under the terms of the GNU Affero General Public License as
#~ published by the Free Software Foundation, either version 3 of the
#~ License, or (at your option) any later version.
#~ This program is distributed in the hope that it will be useful,
#~ but WITHOUT ANY WARRANTY; without even the implied warranty of
#~ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#~ GNU Affero General Public License for more details.
#~ You should have received a copy of the GNU Affero General Public
License
#~ along with this program. If not, see http://www.gnu.org/licenses/
.
import re
from itertools import imap
class NoBraces(Exception): pass
def BraceExpand(text, ordering = []):
Recursively brace expand text in a bash-like fashion.
See 'man 2 bash' under the heading 'Brace Expansion'
Example: /data/file{1..10}.root expands to file1.root ...
file9.root
Ordering allows changing the order of iteration. The rules for
this are
a little complicated. Ordering is a list of boolean values.
If it is possible to expand the postamble, the first value from
the list
is removed, and used to determine whether the postamble should be
iterated
over before iterating over the amble. The list is then passed
down
recursively to the next Brace.
What does this code do?
It is simpler than it looks.
There are three main steps:
1) Split the string into three parts, consisting of pre-amble,
amble and
post-amble. (This requires keeping track of nested {}'s.)
2) In the amble, figure out which commas are not stuck in {}'s,
and
split the string by those commas.
3) For each part of this split string, Add together the pre-
amble, the
string and the post-amble. Call BraceExpand() on this string
to deal
with nested braces and any expansion required in the
postamble
Other things this code does which make it look more complicated:
* Expand ranges along the lines of {1..10}
* Allow for re-arranging the order of iteration
Todo/Not Implemented:
* Escaping/quoting
Example C implementation from bash (inspiration for this):
http://www.oldlinux.org/Linux.old/bin/old/bash-1.11/braces.c
def FindMatchedBraces(text, position = -1):
Search for nested start and end brace in text starting from
position
braceDepth = 0
nextClose = -1
first = True
# Search for a {
# is it closer than the nearest } ?
# Yes : increase brace depth
# No : decrease brace depth
# When we reach braceDepth == 0, we have found our close brace
while braceDepth or first:
nextOpen = text.find({, position+1)
nextClose = text.find(}, position+1)
if first and nextOpen = 0:
startBrace = nextOpen
first = False
if nextOpen nextClose and nextOpen = 0:
braceDepth += 1
position = nextOpen
elif nextClose = 0:
braceDepth -= 1
position = nextClose
else:
raise NoBraces()
return startBrace, position
try: start, end = FindMatchedBraces(text)
except NoBraces:
# There are no braces! Nothing to expand!
return [text]
# Split the text into three bits, '{pre,,post}amble'. The 'pre' is
anything
# before expansion, the '' is the bit that needs expanding and
gluing to
# the pre and the post. After gluing together, we can recursively
expand
# again
preamble = text[:start]
amble = text[start+1:end]
postamble = text[end+1:]
def BareCommaSearcher(amble):
Search for commas which are not encapsulated in {}
haveBraces = True
try: start, end = FindMatchedBraces(amble)
except NoBraces: haveBraces = False
position = -1
while True:
position = amble.find(,, position+1)
if position 0:
# We didn't find any comma after 'position', finish
searching.
break
if haveBraces and start position end:
# We're inside some braces, skip to the end of them,
find the
# next set.
position = end
haveBraces = True
try: start, end = FindMatchedBraces(amble, position)
except NoBraces: haveBraces = False
continue
yield position
# Reached the end of
Re: Bash-like brace expansion
Okay, yuck. I didn't realise that posting would mangle the code so badly. Is there any better way to attach code? I'm using google groups. On Mar 24, 12:28 pm, Peter Waller peter.wal...@gmail.com wrote: Okay, I got fed up with there not being any (obvious) good examples of how to do bash-like brace expansion in Python, so I wrote it myself. Here it is for all to enjoy! If anyone has any better solutions or any other examples of how to do this, I'd be glad to hear from them. snip -- http://mail.python.org/mailman/listinfo/python-list
iPython 0.9.1 install under XP -- R6034
Hello all, I am having problems trying installing iPython under XP. It works great under Linux and it would be great if I could also use it when I have to be in Windows. XP Professional SP2 + SP3 (tried different systems), iPython-0.9.1, Python 2.6.1 During Please wait while running postinstall script .. I get the following MS Visual C++ Runtime Error R6034 An application has made an attempt to load th C runtime library incorrectly. . I get this message 4 or 5 times and eventually end up with this: *** run_installscript: internal error 0x *** I've seen this error reported before while searching the web, so I know I'm not the only one who has run into this problem, but not seen any solutions. Can anyone help? Thanks, Esmail PS: I see a ipython users group, but I have been unable to post to it despite trying for the last few days. Perhaps someone here who uses iPython under XP can help. -- http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
CinnamonDonkey: It is neither constructive nor educational. It's a bit like saying If you don't know what a function is, then maybe you don't need it. ... have you tried having a single block of code? The point of people coming to these forums is to LEARN and share knowledge. Perhaps it's not the best solution for me right now but without trying it I won't know when or how to apply it as a solution. By the way, my project has about 50 files (modules) in it with a lot of shared code that could be used across other projects... seems as good a reason as any to try packages out ;-) I don't agree. My answer can be wrong for your situation, but I can't know much about you from the start, and for most people my answer was the right one. When a student asks me how to improve his/her usage of metaclasses I usually answer that metaclasses aren't required to solve that small problem. Generally in engineering the simplest solution is the one you have to try first (and often second and third), and only later, if practical experience shows the simple solution doesn't work, you try a more complex solution. So I have suggested you a simple solution by default. If later you see that you have many modules and you really need packages, then it's easy to ignore my first answer. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
Peter Waller: Is there any better way to attach code? This is a widely used place (but read the contract/disclaimer first): http://code.activestate.com/recipes/langs/python/ Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
2009/3/24 Tino Wildenhain t...@living-examples.com
The simple {foo} expansion you mention should be quite easily handled
with re.sub and a function as argument. So not much more then a few
lines of code.
Could this approach be made to handle recursive expansion? From the example
with the script:
pprint(BraceExpand(electron_{n,{pt,eta,phi}[{1,2}]}, ordering = [True]))
Gives:
['electron_n',
'electron_pt[1]',
'electron_eta[1]',
'electron_phi[1]',
'electron_pt[2]',
'electron_eta[2]',
'electron_phi[2]']
Cheers,
- Pete
--
http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
What one really wants is a re option capable of handling recursive structures, something along the lines of what PHP has: http://uk2.php.net/manual/en/regexp.reference.php Under the 'Recursive Patterns' heading. As far as I am aware, no such thing exists for Python (yet?). 2009/3/24 Peter Waller peter.wal...@gmail.com Could this approach be made to handle recursive expansion? From the example with the script: -- http://mail.python.org/mailman/listinfo/python-list
Re: Query regarding Python sybase module
Srini Does Sybase Python driver module implement multiple result sets
Srini from a single command?
I've used it to get multiple result sets from stored procedures, so I guess
the answer would be yes. Something like this:
params = curs.callproc('stored_procedure', params)
while True:
... rows = curs.fetchall()
... print rows
... if not curs.nextset():
... break
--
Skip Montanaro - s...@pobox.com - http://www.smontanaro.net/
--
http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
Peter Waller wrote:
Okay, I got fed up with there not being any (obvious) good examples of
how to do bash-like brace expansion in Python, so I wrote it myself.
Here it is for all to enjoy!
If anyone has any better solutions or any other examples of how to do
this, I'd be glad to hear from them.
It may be a funny experiment but I really fail to see the value in your
proposal.
The simple {foo} expansion you mention should be quite easily handled
with re.sub and a function as argument. So not much more then a few
lines of code.
Interesting could be to have {foo#bar} and {foo%bar} as well but again
I don't think the whole stuff would be very usefull anyway given the
%(foo)s form works quite well and has a host of options (for aligning
for example).
Cheers
Tino
--
http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
Peter Waller peter.wal...@gmail.com writes: Okay, yuck. I didn't realise that posting would mangle the code so badly. Is there any better way to attach code? Yes: Use a news client other than Google Groups. I'm using google groups. Fix that, first. -- \ “Are you pondering what I'm pondering?” “I think so, Brain, but | `\why would anyone want a depressed tongue?” —_Pinky and The | _o__) Brain_ | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Wiki syntax available when publishing on pypi
A non python, but pypi only related question: Where I can find a reference guide about all what I can do with the text infos about a pypi egg published? Looking at others guys code I lear how to make links, bold text, italic, lists... For example one time I found how to insert an image in the text, but I don't remember how. There is a official refence about this? -- -- luca -- http://mail.python.org/mailman/listinfo/python-list
Re: Wiki syntax available when publishing on pypi
it's some form of restructured text, which is described at http://docutils.sourceforge.net/rst.html however, there seem to be various implementations; i don't know if pypi exactly follows what is described there (i know i had a small problem with some detail being inconsistent with that convention used in sphinx). also - if there's any kind of syntax error, pypi displays the entire description literally (and gives no other error feedback that i have found). andrew Luca wrote: A non python, but pypi only related question: Where I can find a reference guide about all what I can do with the text infos about a pypi egg published? Looking at others guys code I lear how to make links, bold text, italic, lists... For example one time I found how to insert an image in the text, but I don't remember how. There is a official refence about this? -- -- luca -- http://mail.python.org/mailman/listinfo/python-list -- http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
Top responses guys! This has all helped increadibly. Bearophile, My applogies if I have offended you, but: 1. I can't know much about you from the start - Is kind of my point. Perhaps it would be better to avoid jumping to conclusions and pre- judging someones abilities simply because they are lacking knowledge in a particular area. Would it have been better if I had opened my thread with a copy of my CV? I've got a Degree in Digital Systems Engineering (yes I am also an Engineer)... I went on to do a Phd in AI and Robotics where I also developed embedded systems. I bummed out on that after 3 years and went on to work for a games company where I worked on 6 game titles across 5 different platforms. I was a Lead Software Engineer for the last 5 years. Before now moving on again. 2. I am also very much a follower of the K.I.S.S. approach, 9 times out of 10 the simplest solution is often the best. As an Engineer though I would also suggest that the best way to learn is to try solving a problem being sure to constantly assess your approach and then your final solution. By dismissing a possible avenue you are dismissing a whole new path of knowledge. Is it not better to try and fail than never try at all? Surely this is how we gain the valuable experience we need. By simply suggesting a simple default solution, I may never have consider the alternatives nor understand why they are or are not suitable. 3. I get your point about Students, sometimes there is such a thing as too much knowledge or information overload. Whilst doing a PhD I had to take labs and teach students... The approach I tried to take was one off, You may not need packages, why do you think you need packages? or This is how packages would be used and why they would be used... do you still think you need packages or better still, for a capable student, This is how packages work, try solving your problem and then tell me if you think it was a good solution. Going with R. David Murray, perhaps I also jumped too my own conclusion too quickly and for that I appologise. Cheers, Shaun On 24 Mar, 12:37, bearophileh...@lycos.com wrote: CinnamonDonkey: It is neither constructive nor educational. It's a bit like saying If you don't know what a function is, then maybe you don't need it. ... have you tried having a single block of code? The point of people coming to these forums is to LEARN and share knowledge. Perhaps it's not the best solution for me right now but without trying it I won't know when or how to apply it as a solution. By the way, my project has about 50 files (modules) in it with a lot of shared code that could be used across other projects... seems as good a reason as any to try packages out ;-) I don't agree. My answer can be wrong for your situation, but I can't know much about you from the start, and for most people my answer was the right one. When a student asks me how to improve his/her usage of metaclasses I usually answer that metaclasses aren't required to solve that small problem. Generally in engineering the simplest solution is the one you have to try first (and often second and third), and only later, if practical experience shows the simple solution doesn't work, you try a more complex solution. So I have suggested you a simple solution by default. If later you see that you have many modules and you really need packages, then it's easy to ignore my first answer. Bye, bearophile -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP 3143: Standard daemon process library
On Tue, 24 Mar 2009 15:42:46 +1100, Ben Finney bignose+hates-s...@benfinney.id.au wrote: Jean-Paul Calderone exar...@divmod.com writes: [snip] An additional feature which would be useful for the library to provide, however, would be the setting of euid and egid instead of uid and gid. This is necessary, for example, to write an SSH daemon which gives out user shells. That sounds rather more specific than is needed for the generic library being proposed here. I'm wary of adding features to an API that is already quite complex. Isn't setting the EUID and EGID something that is just as easily done *after* the program achieves a daemon process? That depends. If you mean that one can ignore the uid and gid setting features of the proposed library so that they are not changed during daemonization and then make the appropriate calls from the application afterwards, then yes. Otherwise, no. Since this means all of your daemon startup code is forced to run as a privileged process when it might otherwise have run without those privileges, I think it's worth the tiny additional complexity it will bring to the API (and it really is pretty tiny, something on the order of a new `set_effective=True´ flag). Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Unit testing frameworks
On Tue, 24 Mar 2009 05:06:47 -0700 (PDT), grkunt...@gmail.com wrote: I am looking for a unit testing framework for Python. I am aware of nose, but was wondering if there are any others that will automatically find and run all tests under a directory hierarchy. One such tool is trial, http://twistedmatrix.com/trac/wiki/TwistedTrial Jean-Paul -- http://mail.python.org/mailman/listinfo/python-list
Re: Unit testing frameworks
grkunt...@gmail.com wrote: I am looking for a unit testing framework for Python. I am aware of nose, but was wondering if there are any others that will automatically find and run all tests under a directory hierarchy. not exactly a framework, but useful while working on small projects - you can run tests from inside eclipse (using the pydev plugin for python). it's easy to run all tests or some small subset (although it is a bit buggy for 3.0). andrew -- http://mail.python.org/mailman/listinfo/python-list
Re: Another of those is issues.
On Fri, 2009-03-20 at 11:20 -0700, Emanuele D'Arrigo wrote: Hi everybody, I was unit testing some code today and I eventually stumbled on one of those is issues quickly solved replacing the is with ==. Still, I don't quite see the sense of why these two cases are different: def aFunction(): ... pass ... f = aFunction f is aFunction True --- Ok, this seems reasonable. Nevertheless, I suspect I shouldn't quite rely on it. class MyClass(object): ... def myMethod(self): ... pass ... c = MyClass() m = c.myMethod m is c.myMethod False --- What? Why is that? In my mind I was expecting that when the method is assigned to m all that it happens is that its address is assigned to the name m so that effectively the same address is now pointed to by two names, like in the function case. I googled around for some hint but I wouldn't exactly say I'm clear on the issue just yet... Can anybody shed some light? Or point to a resource to look at? Or what's the bit of python's source code that is responsible for dealing with those assignments? Manu So here's a f'rinstance counterexample for you: class TempAttributeClass(object): def __init__(self): self.temp = True def foo(self, x): return len(x) + 1 def __getattribute__(self, attr): attribute = object.__getattribute__(self,attr) if hasattr(attribute, '__call__'): if object.__getattribute__(self, 'temp'): self.temp = False return len else: return attribute else: return attribute The first time a method is accessed from an instance of this class, it will return len instead. print TempAttributeClass.foo unbound method TempAttributeClass.foo c = TempAttributeClass() l = [1,2,3] x = c.foo x(l) 3 c.foo 4 x == c.foo False print x built-in function len print y bound method TempAttributeClass.foo of __main__.TempAttributeClass object at 0x7f672b35e290 c.foo is a bound attribute, but what has it been bound to? Well, I guess it technically, it's bound to the instance c, but what has it been bound from? That depends first on what it encounters when traversing its base classes, and second on how it's accessing its attributes. As the example above shows, python is too dynamic to make any guarantees about any of that. Another way you could mess with that is by changing the __class__ attribute on c. class A(object): x = 4 def __init__(self): self.y = 5 class B(object): x = u'cow' def __init__(self): self.y = u'goat' c = A() c.x 4 c.y 5 c.__class__ = B # Note that neither c nor x were changed in the last step ... c.x # Class attribute found on B now u'cow' c.y # Instance attribute: already initialized from A.__init__ 5 c.__init__() # Reinitialize c, now using B.__init__ c.y # Re-initialized instance attribute u'goat' Cheers, Cliff -- http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
Peter Waller peter.wal...@gmail.com wrote: Okay, I got fed up with there not being any (obvious) good examples of how to do bash-like brace expansion in Python, so I wrote it myself. Here it is for all to enjoy! Interesting! Might I suggest some unit tests? You can then test all the corner cases (unmatched brackets, empty brackets, etc) and be sure it works exactly as specified. doctest is cool for this kind of stuff. -- Nick Craig-Wood n...@craig-wood.com -- http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
Johannes Bauer wrote: Sebastian Bassi schrieb: No, there is no certification for Python. Maybe in the future... I'll hand out the Johannes Bauer Python Certificate of Total Awesomeness for anyone who can write a hello world in python and hands me $25000 in cash. This whole certified foobar programmer is complete crap IMHO. The above offer stands nontheless. The Johannes Bauer Certificate of Really Awesome Python? ;-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Unit testing frameworks
On Tue, Mar 24, 2009 at 8:06 AM, grkunt...@gmail.com wrote:
I am looking for a unit testing framework for Python. I am aware of
nose, but was wondering if there are any others that will
automatically find and run all tests under a directory hierarchy.
Have you already looked at the unittest module? Below is the code I
use for one of my current projects to load all test cases in package.
This code is sitting in __init__.py, and the test cases are in
separate files (util.py, util_threading.py, etc.). Those files can
contain as many TestCase classes as needed, all are loaded with
loadTestsFromModule. You could easily modify this code to
automatically generate the modules list if you want to.
# repo/pypaq/test/__init__.py
from unittest import TestSuite, defaultTestLoader
import logging
import sys
__all__ = ['all_tests']
modules = ['util', 'util_buffer', 'util_event', 'util_threading']
if not __debug__:
raise RuntimeError('test suite must be executed in debug mode')
all_tests = []
for name in modules:
module = __import__('pypaq.test', globals(), locals(), [name], 0)
tests = defaultTestLoader.loadTestsFromModule(getattr(module, name))
__all__.append(name)
all_tests.append(tests)
setattr(sys.modules[__name__], name, tests)
logging.getLogger().setLevel(logging.INFO)
all_tests = TestSuite(all_tests)
I then have test_pypaq.py file under repo/, with which I can execute
all_tests or only the tests from a specific module:
# repo/test_pypaq.py
from unittest import TextTestRunner
from pypaq.test import *
TextTestRunner(verbosity=2).run(all_tests)
- Max
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Re: iPython 0.9.1 install under XP -- R6034
On Tue, Mar 24, 2009 at 9:36 PM, Esmail ebo...@hotmail.com wrote: Hello all, I am having problems trying installing iPython under XP. It works great under Linux and it would be great if I could also use it when I have to be in Windows. XP Professional SP2 + SP3 (tried different systems), iPython-0.9.1, Python 2.6.1 During Please wait while running postinstall script .. I get the following MS Visual C++ Runtime Error R6034 An application has made an attempt to load th C runtime library incorrectly. . I wonder whether this may be due to the python installer being link to one version of the C runtime and python another (python 2.6 is linked against the MSVCR 9.0). If you need ipython quickly, I would simply try building the installer myself from sources - as ipython does not have dependency and is pure python, it should be straightfoward to do a python setup.py bdist_wininst, cheers, David -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP 3143: Standard daemon process library
On Mar 21, 11:06 pm, Ben Finney ben+pyt...@benfinney.id.au wrote: Floris Bruynooghe floris.bruynoo...@gmail.com writes: Had a quick look at the PEP and it looks very nice IMHO. Thank you. I hope you can try the implementation and report feedback on that too. One of the things that might be interesting is keeping file descriptors from the logging module open by default. Hmm. I see that this would be a good idea. but it raises the question of how to manage the set of file handles that should not be closed on becoming a daemon. So far, the logic of closing the file descriptors is a little complex: * Close all open file descriptors. This excludes those listed in the `files_preserve` attribute, and those that correspond to the `stdin`, `stdout`, or `stderr` attributes. Extending that by saying “… and also any file descriptors for ``logging.FileHandler`` objects” starts to make the description too complex. I have a strong instinct that it the description is complex, the design might be bad. Can you suggest an alternative API that will ensure that all file descriptors get closed *except* those that should not be closed? Not an answer yet, but I'll try to find time in the next few days to play with this and tell you what I think. logging.FileHandler would be too narrow in any case I think. Regards Floris -- http://mail.python.org/mailman/listinfo/python-list
Transition from urllibs to browser and keep session alive
Hello, I currently have a script that uses httplib2 to navigate through a website and collect some cookies manually along the way. It is an https that requires a logon, then i navigate through a few pages and the end result is to dump some info into a javascript and i display the returned html in a browser. It works great if you just need to print that one page, but if someone wants to click further into the page it wont work because it is just a local copy of the returned html. I would like to find a way to take the cookie and session information and open the page in a browser after i have walked through the pages and collected the cookies by means of a script, etc. Just looking for some recomendations on what modules would fit this scenerio best. Your responses are greatly appreciated, thanks! James -- http://mail.python.org/mailman/listinfo/python-list
Appending to sys.path
I have an application where I would like to append to the python path
dynamically. Below is a test script I wrote. Here's what I thought
would happen:
1) I run this script in a folder that is NOT already in PYTHONPATH
2) The script creates a subfolder called foo.
3) The script creates a file called foo.py, with a foo() method
defined in it.
4) The script attempts to import this module, which fails because the
current folder is not in PYTHONPATH.
5) The script then adds the current folder to the end of sys.path
6) The script again attempts to import foo.foo, and succeeds.
#6 never happens, but I can't figure out why. I'm running on Mac OS
10.5, with python 2.5.1.
Anybody have any tips?
Thanks,
Mike
Here's the script:
#!/usr/bin/python
import sys
import os.path
txt = 'def foo(): print Hello world!\n'
if not os.path.isdir('foo'):
os.mkdir('foo')
f = open('foo/foo.py','wt')
f.write(txt)
f.close()
try:
__import__('foo.foo')
except ImportError:
homedir = os.path.abspath(sys.path[0]) #where is this script?
print 'Adding %s to sys.path' % (homedir)
sys.path.append(homedir)
try:
__import__('foo.foo')
print 'Import now successful'
except ImportError:
print Why didn't this work?
sys.exit(1)
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Re: Relative Imports, why the hell is it so hard?
On Mar 23, 10:16 am, CinnamonDonkey cinnamondon...@googlemail.com wrote: I'm fairly new to Python so I still have a lot to learn. But I'd like to know how to correectly use relative imports. Relative imports are *fundamentally* broken in python. You will soon see that code using relative import will break if you attempt to run the module on its own. Yes, it is mindboggling! Why is it so you ask? It is one of those issue that would be trivial to implement correctly (it is relative to the current file location, duh!!!), would be tremendously useful yet for some reason it is controversial with those who would need to implement it. It looks like they think that the expected mode of operation would greatly confuse the 'rest' of us. So that is the reason you end up with a broken implementation that is worse than not having it at all. All I can do is recommend that you avoid relative imports. The easiest way around the issue is to create a module named pathfix.py like the one below and import it in all of your modules. This is the only way to fix this issue in a way that does not come back and bite you, it is ugly, you are repeating yourself in multiple places, but it is still better than the alternative. --- import os, sys def path_join(*args): return os.path.abspath(os.path.join(*args)) # adds base directory to import path to allow relative imports __currdir = os.path.dirname( __file__ ) __basedir = path_join(__currdir, '..' ) if __basedir not in sys.path: sys.path.append( __basedir ) -- http://mail.python.org/mailman/listinfo/python-list
Re: install pyPgSQL on Windows for python 2.5
someone wrote: Hi, does anyone know how to install pyPgSQL on Windows? There is no package for Python 2.5 on Homepage: I've installed newest Visual C++ Studio 2008 from Microsoft, but still no luck Hello Pet, you need Visual Studio 2003 to compile extensions for Python 2.5 If you want, I can send you a binary. Regards, Dietmar -- http://mail.python.org/mailman/listinfo/python-list
Re: Appending to sys.path
mhearne808[insert-at-sign-here]gmail[insert-dot-here]com wrote:
I have an application where I would like to append to the python path
dynamically. Below is a test script I wrote. Here's what I thought
would happen:
1) I run this script in a folder that is NOT already in PYTHONPATH
2) The script creates a subfolder called foo.
3) The script creates a file called foo.py, with a foo() method
defined in it.
4) The script attempts to import this module, which fails because the
current folder is not in PYTHONPATH.
5) The script then adds the current folder to the end of sys.path
6) The script again attempts to import foo.foo, and succeeds.
#6 never happens, but I can't figure out why. I'm running on Mac OS
10.5, with python 2.5.1.
Anybody have any tips?
Thanks,
Mike
Here's the script:
#!/usr/bin/python
import sys
import os.path
txt = 'def foo(): print Hello world!\n'
if not os.path.isdir('foo'):
Here you add a directory under the current working directory.
os.mkdir('foo')
f = open('foo/foo.py','wt')
f.write(txt)
f.close()
To turn the foo directory into a package you must also create a file
foo/__init__.py (may be empty).
try:
__import__('foo.foo')
except ImportError:
homedir = os.path.abspath(sys.path[0]) #where is this script?
print 'Adding %s to sys.path' % (homedir)
sys.path.append(homedir)
Here you add the directory to the path were the script is located, not the
cwd. Should be
sys.path.append(.)
try:
__import__('foo.foo')
print 'Import now successful'
except ImportError:
print Why didn't this work?
sys.exit(1)
Peter
--
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Re: Translating unicode data
On Mar 23, 4:16 pm, Peter Otten __pete...@web.de wrote: CaptainMcCrank wrote: I'm struggling with a problem analyzing large amounts of unicode data in an http wireshark capture. I've solved the problem with the interpreter, but I'm not sure how to do this in an automated fashion. I'd like to grab a line from a text file translate the unicode sections of it to ascii. So, for example I'd like to take \u003cb\u003eMar 17\u003c/b\u003e and turn it into bMar 17/b I can handle this from the interpreter as follows: import unicodedata mystring = u\u003cb\u003eMar 17\u003c/b\u003e print mystring bMar 17/b But I don't know what I need to do to automate this! The data that is in the quotes from line 2 will have to come from a variable. I am unable to figure out how to do this using a variable rather than a literal string. If wireshark uses the same escape codes as python you can use str.decode() or open the file with codecs.open(): s = \u003cb\u003eMar 17\u003c/b\u003e s '\\u003cb\\u003eMar 17\\u003c/b\\u003e' s.decode(unicode-escape) u'bMar 17/b' open(tmp.txt, w).write(s) import codecs f = codecs.open(tmp.txt, r, encoding=unicode-escape) f.read() u'bMar 17/b' Peter This is a workable solution! Thank you Peter! -- http://mail.python.org/mailman/listinfo/python-list
Re: parsing tab separated data efficiently into numpy/pylab arrays
You could take a look/use the very handy csv2rec function in
matplotlib.mlab, which creates numpy struct arrays.
Marco
On Mar 13, 10:19 pm, per perfr...@gmail.com wrote:
hi all,
what's the most efficient / preferred python way ofparsingtab
separated data intoarrays? for example if i have a file containing
two columns one corresponding to names the other numbers:
col1 \t col 2
joe \t 12.3
jane \t 155.0
i'd like to parse into an array() such that i can do: mydata[:, 0] and
mydata[:, 1] to easily access all the columns.
right now i can iterate through the file, parse it manually using the
split('\t') command and construct a list out of it, then convert it toarrays.
but there must be a better way?
also, my first column is just a name, and so it is variable in length
-- is there still a way to store it as an array so i can access: mydata
[:, 0] to get all the names (as a list)?
thank you.
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minor revision encoded in SONAME in libpython.so
I'm wondering why the SONAME in libpython.so has a minor revision encoded in it; for example (on Linux): $ readelf -d libpython2.6.so | grep SONAME 0x000e (SONAME) Library soname: [libpython2.6.so.1.0] Because of this, if I compile an app against this library (with '-L/ usr/lib -lpython2.6), the compiled app has a dependency in this precise minor revision of libpython2.6.so: $ readelf -d myApp | grep libpython 0x0001 (NEEDED) Shared library: [libpython2.6.so.1.0] So, for example, if I upgrade to libpython2.6.so.1.1, my app will not be able to run. I am currently having this problem while integrating a piece of third-party software that uses an embedded python interpreter. This is unusual for libraries of this kind. Typically, the SONAME will contain only the major revision, on the assumption that all the minor revisions conform to the same public API, and are nominally interchangeable. Am I to assume that minor version iterations have incompatible API's? Thanks in advance for any guidance. -- http://mail.python.org/mailman/listinfo/python-list
Re: install pyPgSQL on Windows for python 2.5
On Mar 24, 4:57 pm, Dietmar Schwertberger n...@schwertberger.de wrote: someone wrote: Hi, does anyone know how to install pyPgSQL on Windows? There is no package for Python 2.5 on Homepage: I've installed newest Visual C++ Studio 2008 from Microsoft, but still no luck Hello Pet, you need Visual Studio 2003 to compile extensions for Python 2.5 If you want, I can send you a binary. O, thank you very much! Where should I put hole thing? Regards, Dietmar -- http://mail.python.org/mailman/listinfo/python-list
Re: Async serial communication/threads sharing data
Hendrik van Rooyen wrote: Nick Craig-Wood ni...g-wood.com wrote: I wrote a serial port to TCP proxy (with logging) with twisted. The problem I had was that twisted serial ports didn't seem to have any back pressure. Not sure if this is Twisted's fault - do python sockets have automatic back pressure? Do Linux sockets have back pressure? Yes, and yes. John Nagle -- http://mail.python.org/mailman/listinfo/python-list
Re: Unit testing frameworks
On Mar 24, 8:06 am, grkunt...@gmail.com wrote: I am looking for a unit testing framework for Python. I am aware of nose, but was wondering if there are any others that will automatically find and run all tests under a directory hierarchy. Thanks, Ralph *Nose *Trial *py.test -- http://mail.python.org/mailman/listinfo/python-list
Re: Does Python have certificate?
Johannes Bauer wrote: Sebastian Bassi schrieb: No, there is no certification for Python. Maybe in the future... I'll hand out the Johannes Bauer Python Certificate of Total Awesomeness for anyone who can write a hello world in python and hands me $25000 in cash. This whole certified foobar programmer is complete crap IMHO. The certification kind of comes out in the wash from the O'Reilly development process, it's not a primary goal. The above offer stands nontheless. I'll trade you for a Steve Holden Information Technology certification ... regards Steve -- Steve Holden +1 571 484 6266 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ Want to know? Come to PyCon - soon! http://us.pycon.org/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
Heh, thanks :) Unit tests did cross my mind. I was kicking myself for not starting out with them, there were several regressions during development, and there could well still be lurking corner cases ;) I've since heard that a 'better way' would be to use pyparsing. Also, I saw that python has dropped the idea of having recursive regular expressions at the moment. http://bugs.python.org/msg83993 Maybe I might re-implement this with pyparsing and some unit tests. On Mar 24, 2:30 pm, Nick Craig-Wood n...@craig-wood.com wrote: Peter Waller peter.wal...@gmail.com wrote: Okay, I got fed up with there not being any (obvious) good examples of how to do bash-like brace expansion in Python, so I wrote it myself. Here it is for all to enjoy! Interesting! Might I suggest some unit tests? You can then test all the corner cases (unmatched brackets, empty brackets, etc) and be sure it works exactly as specified. doctest is cool for this kind of stuff. -- Nick Craig-Wood n...@craig-wood.com --http://www.craig-wood.com/nick -- http://mail.python.org/mailman/listinfo/python-list
Best GUI toolkit with Table support
Hi all, I am making a cross-platform frontend to a sqlite3 database. Which python GUI toolkit has the best table support? Tkinter doesn't seem to support them (without additional package installation). The issue is that the application must run off a flash drive with a vanilla Python install on both Windows and Linux. Or if there is a way to store additional packages on the flash drive and call them in some portable way, this would work too. -deech -- http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
En Tue, 24 Mar 2009 12:49:08 -0300, Istvan Albert istvan.alb...@gmail.com escribió: On Mar 23, 10:16 am, CinnamonDonkey cinnamondon...@googlemail.com wrote: I'm fairly new to Python so I still have a lot to learn. But I'd like to know how to correectly use relative imports. Relative imports are *fundamentally* broken in python. You will soon see that code using relative import will break if you attempt to run the module on its own. Yes, it is mindboggling! How import works in general is hard to grasp -- the semantics are rather complicated, partly because the import system has grown patch over patch over the years, and because it's mostly underdocumented. But I would not say that relative imports are fundamentally broken -- they're one of the best improvements to the import system! Why is it so you ask? It is one of those issue that would be trivial to implement correctly (it is relative to the current file location, duh!!!), would be tremendously useful yet for some reason it is controversial with those who would need to implement it. A module doesn't *have* to reside in the filesystem - so in the general case, there is no such thing as current file location. Packages provide such hierarchical disposition - and relative imports work with packages only. It looks like they think that the expected mode of operation would greatly confuse the 'rest' of us. So that is the reason you end up with a broken implementation that is worse than not having it at all. All I can do is recommend that you avoid relative imports. I'd recommend the oposite - use relative (intra-package) imports when possible. Explicit is better than implicit - and starting with 2.7 -when absolute import semantics will be enabled by default- you'll *have* to use relative imports inside a package, or fail. The easiest way around the issue is to create a module named pathfix.py like the one below and import it in all of your modules. This is the only way to fix this issue in a way that does not come back and bite you, it is ugly, you are repeating yourself in multiple places, but it is still better than the alternative. import it in all of your modules? Did you know, once a module is imported by the first time, subsequent imports simply return the same module instance? The initialization code is not executed again. import os, sys def path_join(*args): return os.path.abspath(os.path.join(*args)) # adds base directory to import path to allow relative imports __currdir = os.path.dirname( __file__ ) __basedir = path_join(__currdir, '..' ) if __basedir not in sys.path: sys.path.append( __basedir ) I don't understand, how is this supposed to help relative imports? Bindly inserting directories into sys.path can easily confuse the import system (and you!) -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Relative Imports, why the hell is it so hard?
En Tue, 24 Mar 2009 09:01:01 -0300, R. David Murray rdmur...@bitdance.com escribió: CinnamonDonkey cinnamondon...@googlemail.com wrote: On 23 Mar, 18:57, bearophileh...@lycos.com wrote: CinnamonDonkey: what makes something a package? If you don't know what a package is, then maybe you don't need packages. Thanx for taking the time to post a response but I am afraid I feel the need to point out that it is exactly this kind of response that I find un-helpful. It is neither constructive nor educational. I think bearophile could have left out the first sentence, but otherwise his question is perfectly sensible. If you have a bunch of independent modules, then you don't need to put them in packages. Your example only showed one module file in each package...I understand now that was just for simplicity of the example, but we had no way of knowing that. Especially, since people coming from Java: - think that they *have* to use a package - think that they *have* to put a single class per file Neither is true in Python. And from the example alone, one could infer the OP was making such mistakes. Glad to see it was not the case. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Unit testing frameworks
En Tue, 24 Mar 2009 09:06:47 -0300, grkunt...@gmail.com escribió: I am looking for a unit testing framework for Python. I am aware of nose, but was wondering if there are any others that will automatically find and run all tests under a directory hierarchy. All known testing tools (and some unknown too): http://pycheesecake.org/wiki/PythonTestingToolsTaxonomy -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Best GUI toolkit with Table support
deech wrote: Hi all, I am making a cross-platform frontend to a sqlite3 database. Which python GUI toolkit has the best table support? Tkinter doesn't seem to support them (without additional package installation). The issue is that the application must run off a flash drive with a vanilla Python install on both Windows and Linux. Or if there is a way to store additional packages on the flash drive and call them in some portable way, this would work too. -deech -- http://mail.python.org/mailman/listinfo/python-list this one is build upon wxPython: http://mientki.ruhosting.nl/data_www/pylab_works/pw_sqllite.html cheers, Stef -- http://mail.python.org/mailman/listinfo/python-list
Re: Bash-like brace expansion
On Mar 24, 12:39 pm, Peter Waller peter.wal...@gmail.com wrote: Maybe I might re-implement this with pyparsing and some unit tests. In your pyparsing efforts, you might draw some insights from this regex inverter (that is, given an re such as [AB]\d, returns A0 through B9) on the pyparsing wiki: http://pyparsing.wikispaces.com/file/view/invRegex.py. -- Paul -- http://mail.python.org/mailman/listinfo/python-list
setting directory mod date
I've got some Python code (2.5.1) that's compressing folders on a Windows machine. When the directories get compressed, their modification date changes. Is it possible to grab the modification date of the folder before it's compressed, and then set it's modification date back to it's original state after it's compressed? I've been reading different articles on-line about this, but nothing looks very promising. I haven't tested os.utime() or win32file since others have said these won't work correctly with folders on Windows XP. Thanks. Jay -- http://mail.python.org/mailman/listinfo/python-list
debuglevel for a HTTP request
#Python 2.5
# from Dive Into Python 11.5
import httplib
httplib.HTTPConnection.debuglevel = 1
import urllib2
request = urllib2.Request('http://localhost/test/atom.xml')
opener = urllib2.build_opener()
feeddata = opener.open(request).read()
It doesn't show the debug output, any ideas?
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autocomplete and printing
Q1. I want to access a database and just by pressing the first alphabet will showup a dropdown list of all the words starting from that alphabet how can I do that ? ( I know how to access the database but the further problem is unsolved hence) Q2. How can I print a document for example bill or prescription through a printer or network printer (both) using python ? Thank -- http://mail.python.org/mailman/listinfo/python-list
Re: autocomplete and printing
En Tue, 24 Mar 2009 17:56:26 -0300, vikram moule shivic...@gmail.com escribió: Q1. I want to access a database and just by pressing the first alphabet will showup a dropdown list of all the words starting from that alphabet how can I do that ? ( I know how to access the database but the further problem is unsolved hence) Populate the dropdownlist with results from a query like this: SELECT XXX FROM YYY WHERE XXX LIKE 'A%' (all rows where XXX starts with A). You'll have to provide more info if you want more details (Which database? Which adapter? Is it a console application, a GUI application, a web one? Which toolkit/framework?) Q2. How can I print a document for example bill or prescription through a printer or network printer (both) using python ? If you tell us how would you do that without Python, maybe someone suggests how to do the same thing with Python. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: minor revision encoded in SONAME in libpython.so
So, for example, if I upgrade to libpython2.6.so.1.1 How do you do that? There won't ever be such a library. They will always be called libpython2.6.so.1.0. So no, no minor revision gets encoded into the SONAME. Regards, Martin -- http://mail.python.org/mailman/listinfo/python-list
file open fails.
Hi I am using IDLE on Windows Vista and I have a small code.
title = 'C:\Thesis\refined_title.txt'
file = open(title)
I get the following error from Python.
file = open(title)
IOError: [Errno 22] invalid mode ('r') or filename: 'C:\\Thesis
\refined_title.txt'
Now, I can not understand the problem here I have all the permissions
set for the folder, file as well. I can not understand why would it
happen. Is it known on Windows Vista or am I missing something really
simple and stupid? Please help.
Regards,
Atul.
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Re: PEP 3143: Standard daemon process library
Jean-Paul Calderone exar...@divmod.com writes: On Tue, 24 Mar 2009 15:42:46 +1100, Ben Finney bignose+hates-s...@benfinney.id.au wrote: That sounds rather more specific than is needed for the generic library being proposed here. I'm wary of adding features to an API that is already quite complex. Isn't setting the EUID and EGID something that is just as easily done *after* the program achieves a daemon process? That depends. If you mean that one can ignore the uid and gid setting features of the proposed library so that they are not changed during daemonization and then make the appropriate calls from the application afterwards, then yes. Yes, that's what I meant. Otherwise, no. Since this means all of your daemon startup code is forced to run as a privileged process when it might otherwise have run without those privileges Er? You can still set the real UID and GID via the DaemonContext API, and then also set the EUID and EGID. I think it's worth the tiny additional complexity it will bring to the API (and it really is pretty tiny, something on the order of a new `set_effective=True´ flag). It leads immediately to the request to set *both* real UID/GID *and* effective UID/GID to separate values. Can you describe the use case more, so I can understand better how common it might be? In what circumstances must one not change the real UID/GID but instead change the effective UID/GID, *and* must change them during daemonisation? -- \ “One thing vampire children have to be taught early on is, | `\ don't run with a wooden stake.” —Jack Handey | _o__) | Ben Finney -- http://mail.python.org/mailman/listinfo/python-list
Re: file open fails.
Atul. wrote:
title = 'C:\Thesis\refined_title.txt'
file = open(title)
I get the following error from Python.
file = open(title)
IOError: [Errno 22] invalid mode ('r') or filename: 'C:\\Thesis
\refined_title.txt'
Now, I can not understand the problem here ...
Repesat to yourself 1e4 tmes: I shall not put windows file
names in quotes w/o using 'r' (as in raw files). Either
always use forward slashes, or get used to typing:
title = r'C:\Thesis\refined_title.txt'
In your case, '\r' is a return (a single character), not two
characters long. I think its sad that 'C:\Thesis' doesn't cause
an error because there is no such character as '\T', but I am
probably excessively pedantic.
--Scott David Daniels
scott.dani...@acm.org
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Re: setting directory mod date
jyoun...@kc.rr.com wrote: I've got some Python code (2.5.1) that's compressing folders on a Windows machine. When the directories get compressed, their modification date changes. Is it possible to grab the modification date of the folder before it's compressed, and then set it's modification date back to it's original state after it's compressed? I've been reading different articles on-line about this, but nothing looks very promising. I haven't tested os.utime() or win32file since others have said these won't work correctly with folders on Windows XP. I've just tried it. os.utime() _does_ work correctly on folders. -- http://mail.python.org/mailman/listinfo/python-list
Re: file open fails.
Atul. wrote:
Hi I am using IDLE on Windows Vista and I have a small code.
title = 'C:\Thesis\refined_title.txt'
file = open(title)
I get the following error from Python.
file = open(title)
IOError: [Errno 22] invalid mode ('r') or filename: 'C:\\Thesis
\refined_title.txt'
Now, I can not understand the problem here I have all the permissions
set for the folder, file as well. I can not understand why would it
happen. Is it known on Windows Vista or am I missing something really
simple and stupid? Please help.
Backslash has a special meaning in string literals. Use a raw string
instead or double the backslashes:
title = r'C:\Thesis\refined_title.txt'
or:
title = 'C:\\Thesis\\refined_title.txt'
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[ANN] mlabwrap-1.0.1 released
Mlabwrap allows pythonistas to interface to Matlab(tm) in a very straightforward fashion: from mlabwrap import mlab mlab.eig([[0,1],[1,1]]) array([[-0.61803399], [ 1.61803399]]) More at http://mlabwrap.sourceforge.net. Mlabwrap 1.0.1 is just a maintenance release that fixes a few bugs and simplifies installation (no more LD_LIBRARY_PATH hassles). 'as -- http://mail.python.org/mailman/listinfo/python-list
Re: file open fails.
On Tue, Mar 24, 2009 at 4:04 PM, Scott David Daniels scott.dani...@acm.org wrote: Atul. wrote: snip In your case, '\r' is a return (a single character), not two characters long. I think its sad that 'C:\Thesis' doesn't cause an error because there is no such character as '\T', but I am probably excessively pedantic. \T might mean the same thing as \t (tab), but I thought it would be different... -wj -- http://mail.python.org/mailman/listinfo/python-list
Re: debuglevel for a HTTP request
It doesn't show the debug output, any ideas? I think like this: opener = urllib2.build_opener(urllib2.HTTPHandler(debuglevel=1)) -- http://mail.python.org/mailman/listinfo/python-list
Re: file open fails.
On Tue, Mar 24, 2009 at 4:32 PM, Wes James compte...@gmail.com wrote: On Tue, Mar 24, 2009 at 4:04 PM, Scott David Daniels scott.dani...@acm.org wrote: Atul. wrote: snip In your case, '\r' is a return (a single character), not two characters long. I think its sad that 'C:\Thesis' doesn't cause an error because there is no such character as '\T', but I am probably excessively pedantic. \T might mean the same thing as \t (tab), but I thought it would be different... I guess not: http://docs.python.org/reference/lexical_analysis.html#string-literals Wonder why when I do print test\Ttest vs print test\ttest \T just get printed? -wj -- http://mail.python.org/mailman/listinfo/python-list
Re: Style question - defining immutable class data members
In article mailman.1847.1237048379.11746.python-l...@python.org, Maxim Khitrov mkhit...@gmail.com wrote: Very simple question on the preferred coding style. I frequently write classes that have some data members initialized to immutable values. For example: class Test(object): def __init__(self): self.some_value = 0 self.another_value = None Similar effect can be achieved by defining some_value and another_value for the entire class, like so: class Test(object): some_value = 0 another_value = None The advantage of doing this is that the assignments are evaluated once and thus the creation of that class is a bit faster. Access is still performed through self.some_value and self.another_value. Is there a reason to prefer the first style over the second? Well, as you can see from reading this whole thread, it can be the source of some confusion. Nevertheless, I personally sometimes use the style of initializing at the class level. I think it's probably worth creating a style guide entry for this issue if you're using Python for your employer. -- Aahz (a...@pythoncraft.com) * http://www.pythoncraft.com/ At Resolver we've found it useful to short-circuit any doubt and just refer to comments in code as 'lies'. :-) --Michael Foord paraphrases Christian Muirhead on python-dev, 2009-3-22 -- http://mail.python.org/mailman/listinfo/python-list
Python 3 consistency proposal
Rename all built in classes with a capital letter example Str() Int() Object() Make () optional for a function definition class Test: pass def test: pass Any chance Guido would approve this :-) -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3 consistency proposal
Rename all built in classes with a capital letter example Str() Int() Object() Why? Make () optional for a function definition class Test: pass def test: pass Why? Any chance Guido would approve this :-) In my estimation, the chance that Guido would approve this is less than 10^(-26). Cheers, Daniel -- Psss, psss, put it down! - http://www.cafepress.com/putitdown -- http://mail.python.org/mailman/listinfo/python-list
Re: Best GUI toolkit with Table support
deech wrote: Hi all, I am making a cross-platform frontend to a sqlite3 database. Which python GUI toolkit has the best table support? Tkinter doesn't seem to support them (without additional package installation). The issue is that the application must run off a flash drive with a vanilla Python install on both Windows and Linux. Or if there is a way to store additional packages on the flash drive and call them in some portable way, this would work too. If you don't need custom sqlite functionality, you could use an existing sqlite manager app, such as SQLiteManager, which runs cross-platform as a Firefox extension, or can use XULRunner as a standalone (so it could run off a flash drive): http://code.google.com/p/sqlite-manager/wiki/ScreenShots Cheers, Todd -- http://mail.python.org/mailman/listinfo/python-list
Re: iPython 0.9.1 install under XP -- R6034
Hello David, David Cournapeau wrote: If you need ipython quickly, I would simply try building the installer myself from sources - as ipython does not have dependency and is pure python, it should be straightfoward to do a python setup.py bdist_wininst, Thanks for the suggestion, it seems to have worked, but I don't think it created any of the .bat files or entries in the startup menu etc. .. any idea how to those parts set up? Also, how did you know about the bdist_wininst command line argument? I looked around for this sort of information, but must have missed it. Esmail -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem Python 2.6.1 vs 2.6 pyWin32
Martin v. Löwis martin at v.loewis.de writes: Sorry for not being explicit. With installer I meant the binary Windows installer you create with command python setup.py bdist_wininst. In the past we've been able to use package-version.win32.exe files created with Python 2.5 on older version, but that doesn't seem to be case with 2.6. I see. This has nothing to do with the OP's question, then. For Python 2.6, we switched to VS 2008. Apparently, the bdist_msi installers now get linked with the VS 2008 CRT (msvcr90.dll), which must be present on the system (in WinSxS) for the installer to run; one way of installing the CRT is to install Python for all users, another is to install it just for me, and put \python26 into PATH (so that the installer can find msvcr90.dll). Hi Martin, Unfortunately this solution can't be used where the user is not permitted to upgrade Python to 2.6 or where there appears to be an incompatible version of msvcr90.dll in C:\windows\winsxs. For example a user with no admin privileges on his work PC and stuck with Python 2.4.2 on Windows XP SP2 (not SP3) has the following problem when trying to run a bdist_wininst .exe that was created for a pure-Python package using Python 2.6.1: the error message is the same as stated in this article: http://www.chiark.greenend.org.uk/~sgtatham/putty/wishlist/xp-wont-run.html presumably (given his locale) the German version of the error message, complete with MS misspelling. It would appear that the safest cover-most-bases option for a developer/packager of pure-Python packages (especially one intended to be runnable on older versions of Python, some as far back as 2.1) is to use Python 2.5 to make the bdist_wininst (the exe is linked against msvcr71.dll which is widely available and doesn't have SxS problems). Do you agree? If so, where is the best place to propagate this advice? Cheers, John -- http://mail.python.org/mailman/listinfo/python-list
Re: setting directory mod date
En Tue, 24 Mar 2009 19:10:50 -0300, MRAB goo...@mrabarnett.plus.com escribió: jyoun...@kc.rr.com wrote: I've got some Python code (2.5.1) that's compressing folders on a Windows machine. When the directories get compressed, their modification date changes. Is it possible to grab the modification date of the folder before it's compressed, and then set it's modification date back to it's original state after it's compressed? I've been reading different articles on-line about this, but nothing looks very promising. I haven't tested os.utime() or win32file since others have said these won't work correctly with folders on Windows XP. I've just tried it. os.utime() _does_ work correctly on folders. But not on Python 2.5 :( Using the pywin32 package: py os.stat(cuchi) (16895, 0L, 0, 0, 0, 0, 0L, 1237259905, 1235809285, 1235809278) py from win32file import * py hFile = CreateFile(cuchi, GENERIC_WRITE, 0, ... None, OPEN_EXISTING, ... FILE_FLAG_BACKUP_SEMANTICS, None) py import time py import pywintypes py t = pywintypes.Time(time.localtime()) py win32file.SetFileTime(hFile, t, t, t) py CloseHandle(hFile) py os.stat(cuchi) (16895, 0L, 0, 0, 0, 0, 0L, 1237940110, 1237940110, 1237940110) -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 3 consistency proposal
On Tue, 24 Mar 2009 16:45:26 -0700, gert wrote: Rename all built in classes with a capital letter example Str() Int() Object() Make () optional for a function definition class Test: pass def test: pass Any chance Guido would approve this :-) Unless you're volunteering to produce a patch, the chances are zero. If you *are* willing to do the work, the chances would still be pretty slim. Guido has just rejected a patch adding PEP 8 compliant aliases for types like datetime, so I think replacing built-ins have all-but zero chance. But if you want to pursue it, the right place is the python-ideas mailing list. Go for it ... but be prepared to justify the change, and not just for consistency. As Guido has quoted before, A foolish consistency is the hobgoblin of little minds. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: setting directory mod date
Gabriel Genellina wrote: En Tue, 24 Mar 2009 19:10:50 -0300, MRAB goo...@mrabarnett.plus.com escribió: jyoun...@kc.rr.com wrote: I've got some Python code (2.5.1) that's compressing folders on a Windows machine. When the directories get compressed, their modification date changes. Is it possible to grab the modification date of the folder before it's compressed, and then set it's modification date back to it's original state after it's compressed? I've been reading different articles on-line about this, but nothing looks very promising. I haven't tested os.utime() or win32file since others have said these won't work correctly with folders on Windows XP. I've just tried it. os.utime() _does_ work correctly on folders. But not on Python 2.5 :( Ah, missed that bit (I used Python 2.6.1). Sorry! Using the pywin32 package: py os.stat(cuchi) (16895, 0L, 0, 0, 0, 0, 0L, 1237259905, 1235809285, 1235809278) py from win32file import * py hFile = CreateFile(cuchi, GENERIC_WRITE, 0, ... None, OPEN_EXISTING, ... FILE_FLAG_BACKUP_SEMANTICS, None) py import time py import pywintypes py t = pywintypes.Time(time.localtime()) py win32file.SetFileTime(hFile, t, t, t) py CloseHandle(hFile) py os.stat(cuchi) (16895, 0L, 0, 0, 0, 0, 0L, 1237940110, 1237940110, 1237940110) -- http://mail.python.org/mailman/listinfo/python-list
Re: file open fails.
On Tue, 24 Mar 2009 16:48:30 -0600, Wes James wrote: On Tue, Mar 24, 2009 at 4:32 PM, Wes James compte...@gmail.com wrote: On Tue, Mar 24, 2009 at 4:04 PM, Scott David Daniels scott.dani...@acm.org wrote: Atul. wrote: snip In your case, '\r' is a return (a single character), not two characters long. I think its sad that 'C:\Thesis' doesn't cause an error because there is no such character as '\T', but I am probably excessively pedantic. \T might mean the same thing as \t (tab), but I thought it would be different... I guess not: http://docs.python.org/reference/lexical_analysis.html#string-literals Wonder why when I do print test\Ttest vs print test\ttest \T just get printed? Did you read the section you just linked to? It says so right there: Unlike Standard C, all unrecognized escape sequences are left in the string unchanged, i.e., the backslash is left in the string. (This behavior is useful when debugging: if an escape sequence is mistyped, the resulting output is more easily recognized as broken.) It is also important to note that the escape sequences marked as “(Unicode only)” in the table above fall into the category of unrecognized escapes for non- Unicode string literals. Since there is no standard escape \T then it gets treated as a literal backslash + uppercase t. -- Steven -- http://mail.python.org/mailman/listinfo/python-list
Re: file open fails.
On Tue, 24 Mar 2009 22:48:30 -, Wes James compte...@gmail.com wrote: On Tue, Mar 24, 2009 at 4:32 PM, Wes James compte...@gmail.com wrote: \T might mean the same thing as \t (tab), but I thought it would be different... I guess not: http://docs.python.org/reference/lexical_analysis.html#string-literals Wonder why when I do print test\Ttest vs print test\ttest \T just get printed? Because \T has no special meaning, so is just a two character sequence like any other in the literal. 'print' just prints the string. print repr(test\Ttest), repr(test\ttest) might be illuminating? -- Rhodri James *-* Wildebeeste Herder to the Masses -- http://mail.python.org/mailman/listinfo/python-list
