Re: installing 2 and 3 alongside on MS Windows
Ulrich Eckhardt ulrich.eckha...@dominolaser.com wrote: Hi! I'm using Python 2.7 for mostly unit testing here. I'm using Boost.Python to wrap C++ code into a module, in another place I'm also embedding Python as interpreter into a test framework. This is the stuff that must work, it's important for production use. I'm running MS Windows XP here and developing C++ with VS2005/VC8. What I'm considering is installing Python 3 alongside, in order to prepare the code for this newer version. What I'd like to know first is whether there are any problems I'm likely to encounter and possible workarounds. Thank you! Uli PS: Dear lazyweb, is there any way to teach VC8 some syntax highlighting for Python? One hassle is that .py files can only be associated with one program. The proposed launcher works fine for me: https://bitbucket.org/vinay.sajip/pylauncher/downloads (I'm not sure that is the most up to date place for the launcher, but that's the one I am using) Max -- http://mail.python.org/mailman/listinfo/python-list
Re: How to convert simple B/W graphic to the dot matrix for the LED display/sign
Petr Jakes petr.jakes@gmail.com wrote:
What file format is the graphic in? How big is it?
What file format do you want it to be?
Now, I am able to create the png file with the resolution 432x64
using PIL (using draw.text method for example).
I would like to get the 432x64 True/False (Black/White) lookup
table from this file, so I can switch LEDs ON/OFF accordingly.
--
Petr
The convert and load methods are one way to do it:
import Image
im=Image.new('L', (100,100))
im=im.convert('1')
px=im.load()
px[0,0]
0
That's the numeral one in the argument to convert. The load method
returns a pixel access object.
Max
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Re: GDAL-1.7.1 : vcvarsall.bat missing
kBob krd...@gmail.com wrote: On Jun 25, 1:26 am, Mark Lawrence breamore...@yahoo.co.uk wrote: On 24/06/2010 21:48, Christian Heimes wrote: I am attempting to install the GDAL bindings (GDAL-1.7.1) on a Windows XP Desktop with Python 2.6 and GDAL. During install, the If it suits your needs, you can wire the OSGEO installation of GDAL to a python.org python installation (rather than a bundled OSGEO python interpreter, which is another option): http://trac.osgeo.org/osgeo4w/ Setting the correct paths was enough to get the basic things I used to work (but I haven't used it extensively). Thanks for the tips, gentlemen. I'll try my luck with Cygwin's ggc before I look into another C/C++ compiler. Kelly Dean Fort Collins, CO Giovanni Bajo packages a version of MinGW GCC for use with Python: http://www.develer.com/oss/GccWinBinaries He does note on the page that the MinGW project isn't quite so sure that GCC 4.x is ready for release. Max -- http://mail.python.org/mailman/listinfo/python-list
Re: Numeric literals in other than base 10 - was Annoying octal notation
bartc ba...@freeuk.com wrote:
Scott David Daniels scott.dani...@acm.org wrote in message
news:kn2dnszr5b0bwazxnz2dnuvz_s-dn...@pdx.net...
James Harris wrote:...
Another option:
It can be assumed however that .9. isn't in binary?
That's a neat idea. But an even simpler scheme might be:
.octal.100
.decimal.100
.hex.100
.binary.100
.trinary.100
until it gets to this anyway:
.thiryseximal.100
At some point, abandoning direct support for literals and just
having a function that can handle different bases starts to make a
lot of sense to me:
int('100', 8)
64
int('100', 10)
100
int('100', 16)
256
int('100', 2)
4
int('100', 3)
9
int('100', 36)
1296
max
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Re: httplib incredibly slow :-(
Chris Withers ch...@simplistix.co.uk wrote: I'm still reeling from what seems to be such a huge problem with httplib that seem to be largely ignored :-( Chris There is an httplib2 (but I don't know anything further about it...): http://code.google.com/p/httplib2/ Calling wget or curl using a subprocess is probably as easy as it is ugly, I use the wget build from here: http://gnuwin32.sourceforge.net/packages/wget.htm max -- http://mail.python.org/mailman/listinfo/python-list
Re: Python graphics / imaging library
Peter Chant rempete...@cappetezilla.italsco.uk wrote: No, it does not. However, if PIL was updated last in 2006. Python in 2009 has gone to version 3.1. If PIL is compatible with 3.1 then I'm fine. But I don't want to have to stick with Python 2.5 as the rest of the world moves on. Pete Various messages to the Image-SIG mailing list indicate that support for 3.x is coming after a release of 1.1.7: http://mail.python.org/pipermail/image-sig/2009-March/005498.html More here: http://mail.python.org/pipermail/image-sig/2009-March/thread.html More recent months contain updates to the status of 1.1.7, it is headed towards a release. Preliminary tarballs and binaries are available on effbot.org: http://effbot.org/downloads/#imaging http://effbot.org/downloads/#pil max -- http://mail.python.org/mailman/listinfo/python-list
Re: Delicious API and urllib2
Bill bsag...@gmail.com wrote: The delicious api requires http authorization (actually https). A generic delicious api post url is https:// username:passw...@api.api.del.icio.us/v1/posts/add?url=http:// example.com/description=interestingtags=whatever. The simplest way is probably to manually add the authentication header, as shown here: http://code.activestate.com/recipes/267197/#c2 This article discusses the above strategy, and a strategy using HTTPBasicAuthHandler with a password manager default realm (I think getting the realm correct is what has stymied me in my attempts to use handlers, rather than injecting the header): http://www.voidspace.org.uk/python/articles/authentication.shtml Max -- http://mail.python.org/mailman/listinfo/python-list
Re: Geometry package
Justin Pearson justin.pear...@gmail.com wrote: Hi all, I'm looking for a geometry package in Python; something that will let me define line segments, and can tell me if two line segments intersect. It would be nice if the lines could be defined in n-space (rather than be confined to 2 or 3 dimensions), but this is not a hard constraint. Other functionality might include support for polygons, convex hulls, etc. I've searched Pypi and found a package called Shapely, but when I followed its installation instructions, it threw a bunch of errors and tried to re-install Python :(. Is there a well-known geometry package I'm missing? Thanks for your help, Justin -- http://mail.python.org/mailman/listinfo/python-list I don't know if it is well known, but you could take a look at Euclid: http://partiallydisassembled.net/euclid.html The geometry support is pretty basic. max -- http://mail.python.org/mailman/listinfo/python-list
Re: A different kind of interface
bearophileh...@lycos.com wrote: Years ago I have found this nice small program, TextCalc: http://www.atomixbuttons.com/textcalc/ Despite being very limited and being not integrated with everything else, it's so handy that for me in certain situations it's the right tool to use when I have to process numbers and data in simple ways. It helps me keep all the intermediate solutions, you can save the working page just as the text file you are seeing, it's passive, it doesn't go bang, so if you want you can use it just a primitive text editor. It does something only when you ask it to. And for a basic usage there is nearly nothing to remember. This is mostly an aside to your question, but depending on what you aredoing, Speq Mathematics may be an improvement over TextCalc. The homepage is at http://www.speqmath.com/index.php?id=1. The big differences are that it adds a good deal of functionality (variables, a larger variety of functions, plotting, etc.) and that it treats plain text as an error (unless the text is marked as a comment). max -- http://mail.python.org/mailman/listinfo/python-list
Re: Flash Decoder
Mathieu Prevot [EMAIL PROTECTED] wrote: 2008/5/28 Diez B. Roggisch [EMAIL PROTECTED]: Ankit wrote: Hi everyone,i wanted to build a flash decoder using python can somebody tell me which library to use and what steps should i follow to make a flash(video) decoder?By a decoder i mean that i need to display all the pixel values of each frame.Waiting for your replies. Check out libffmpeg. It should be accessible using python by various means, including gstreamer or ctypes. This is however a rather advanced topic. Diez I think you might want make an ffmpeg/libffmpeg python wrap. It could be really useful, and faster than a pure python decoder. Even for fun. Cheers Mathieu -- http://mail.python.org/mailman/listinfo/python-list It even already exists. There is a binary interface that is maintained alongside pyglet: http://code.google.com/p/avbin/ and then ctypes wrapper for that interface in pyglet: http://code.google.com/p/pyglet/source/browse/trunk/pyglet/media/avb in.py http://www.pyglet.org/doc/programming_guide/sound_and_video.html I haven't used either one, but it's where I would start. Max -- http://mail.python.org/mailman/listinfo/python-list
Re: send yield
castironpi [EMAIL PROTECTED] wrote: Why can't I write this? -- http://mail.python.org/mailman/listinfo/python-list Because you don't know how? max -- http://mail.python.org/mailman/listinfo/python-list
Re: do you fail at FizzBuzz? simple prog test
Arnaud Delobelle [EMAIL PROTECTED] wrote:
On May 12, 1:30 pm, John Machin [EMAIL PROTECTED] wrote:
Duncan Booth wrote:
[...]
I think the variant I came up with is a bit clearer:
for i in range(1,101):
print '%s%s' % ('' if i%3 else 'Fizz', '' if i%5 else
'Buzz') or
i
More than a bit clearer, IMO. How about
print ('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz') or
i (or perhaps
print (('' if i%3 else 'Fizz') + ('' if i%5 else 'Buzz'))
or i to save looking up the precedence rules) ?
Stuff clarity! How about
for i in xrange(1, 101):
print 'FizzBuzz'[4*(i%30):4+4*(i%51)] or i
--
Arnaud
--
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With no loop:
i=1
execprint'FizzBuzz'[4*(i%30):4+4*(i%51)]or i;i+=1;*100
max
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Re: What is the purpose of ptyhon in Windows
WolfgangZ [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] schrieb: hi All, http://mail.python.org/mailman/listinfo/python-list At least I'm living in a free country and nobody forces me to learn python. So I don't fully understand why you HAVE TO learn it. When your problems can be solved in a different programming language than you should be free to use whatever you like. And also why should it be forbidden to create a new programming language? Diversity and competition is usually not bad. -- http://mail.python.org/mailman/listinfo/python-list I imagine that there is some English as a second language getting involved and the intent of the question was more like What is python useful for on Windows?, which has pretty much the same meaning but is open to a slightly friendlier interpretation(i.e., tell me how I can use python instead of tell me why I should use python). The other question might be more like I already know VBS, what do I gain by learning python?. (the answers could be lots of things, including full applications and among other things, you can use it on other platforms, and you might prefer the syntax.) max -- http://mail.python.org/mailman/listinfo/python-list
Re: ISBN Barecode reader in Python?
Nick Craig-Wood [EMAIL PROTECTED] wrote: Joseph [EMAIL PROTECTED] wrote: All: I have written a program to query Amazon with ISBN and get the book details. I would like to extend so that I can read ISBN from the barcode (I will take a photo of the same using webcam or mobile). Are there any opensource/free SDK doing the same? As it is a hobby project, I don't like to spend money on the SDK. Pick yourself up a cue-cat barcode reader, eg from here or ebay http://www.librarything.com/cuecat These appear as a keyboard and type the barcode in to your program. Cheap and effective. The killer application for ISBN lookup on Amazon is checking prices while in the bookstore. Being able to email a photo from your phone and then getting an email with the Amazon price in response would be way easier than typing the isbn into Google or whatever. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Python equivalent to PHP's SPL __autoload() ??
Ixiaus [EMAIL PROTECTED] wrote: I was curious (and have spent an enormous amount of time on Google trying to answer it for myself) if Python has anything remotely similar to PHP's SPL __autoload() for loading classes on the fly?? After digging through docs I feel doubtful there is such a language feature, but, it is possible I missed something or maybe someone has written an extension?!? Thanks in advance! -- http://mail.python.org/mailman/listinfo/python-list If I'm understanding __autoload() correctly, not in the box, but most of what you need is built in, you just have to do a little work to use it. See the Loading and reloading modules section on this page: http://effbot.org/librarybook/builtin.htm max -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib2 Basic authentication, what am I doing wrong?
On Apr 13, 2:11 pm, Michel Bouwmans [EMAIL PROTECTED] wrote: Using this nice class (adapted to urllib2) as a basehandler I see that no Authentication-header is being send out:http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/440574 What am I doing wrong here? I spend almost my entire free time today on this and couldn't find any problem with my code, anyone else has a thought? Thanks in advance. MFB I've attempted to use a password manager and auth manager and failed in the past, so this is only a guess, but presumably, between the realm and uri that you are providing to the password manager, it isn't providing a password for the page you want to load. I've had success just explicitly setting the authorization header, using the method discussed in the comments on this page: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/267197 max -- http://mail.python.org/mailman/listinfo/python-list
Re: [ANN]: Python-by-Example updates
AK [EMAIL PROTECTED] wrote:
Python-by-Example is a guide to LibRef, aiming to give examples
for all functions, classes, modules, etc. Right now examples
for functions in some of the most important modules are
included.
http://pbe.lightbird.net/
thanks,
The second set of examples on the page for decimal doesn't look quite
right.
The first couple of lines:
getcontext().prec = 6 # Decimal('3.0')
Decimal(3.0) # Decimal('3.1415926535')
I would assume that the = 6 isn't getting processed correctly.
max
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Re: Mutagen File Problem
aiwarrior [EMAIL PROTECTED] wrote:
Hi i'm having a IO error saying a file does not exist even though
i perform a isFile() check. Can you help me out figuring what is
wrong?
Thanks in advance
from mutagen.easyid3 import EasyID3
from mutagen.mp3 import MP3
for root, dirs, files in os.walk('''C:\\Documents and
Settings\\pneves\ \Music\\''', topdown=False):
for name in files:
joined = os.path.join(root, name)
if (name[-3:] == 'mp3' ):
audio = MP3(joined, ID3=EasyID3)
if not audio.has_key('album') and
os.path.isfile(joined):
print os.path.join(root, name)
I get an error as following:
IOError: [Errno 2] No such file or directory: 'C:\\Documents and
Settings\\pneves\\Music\\Naked Music - Miguel Migs - Colorful
You\ \Miguel Migs - Colorful you - Full album\\Miguel Migs -
Colorful you - Cd 2 -Mixed and mastered by J. Mark Andrus\\7 -
Miguel Migs feat. Lisa Shaw - You Bring Me Up (Main Vocal
Mix).mp3'
It looks like the error is happending in MP3(join...), so the
os.path.isfile check is never reached. If that is the case,
something along the lines of:
try:
audio=MP3(joined, ID3=EasyID3)
except: #catches any error in MP3...
print joined
should suppress the error and print the filename that triggered it.
max
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Re: Hyphenation module PyHyphen-0.3 released
thebjorn [EMAIL PROTECTED] wrote: 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. -- bjorn You need to convince MingW to use the correct VS runtime. Cribbing from: http://www.develer.com/oss/GccWinBinaries the easy way to do this might be to find(in your mingw /lib directory) and copy or rename libmsvcr71.a and libmsvcr71d.a into libmsvcrt.a and libmsvcrtd.a (backing up the originals if desired). If the MingW you have installed doesn't provide the appropriate runtime, you would have to track that down. The MingW/GCC package from the linked page provides a utility to do this, but it is a tossup/up to you if the version of GCC provided is suitable for 'production' use. max -- http://mail.python.org/mailman/listinfo/python-list
Re: a newbie regex question
Dotan Cohen [EMAIL PROTECTED] wrote: Maybe you mean: for match in re.finditer(r'\([A-Z].+[a-z])\', contents): Note the last backslash was in the wrong place. The location of the backslash in the orignal reply is correct, it is there to escape the closing paren, which is a special character: import re s='Abcd\nabc (Ab), (ab)' re.findall(r'\([A-Z].+[a-z]\)', s) ['(Ab), (ab)'] Putting the backslash at the end of the string like you indicated results in a syntax error, as it escapes the closing single quote of the raw string literal: re.findall(r'\([A-Z].+[a-z])\', s) SyntaxError: EOL while scanning single-quoted string max -- http://mail.python.org/mailman/listinfo/python-list
Re: Extracting images from a PDF file
Doug Farrell [EMAIL PROTECTED] wrote: Hi all, Does anyone know how to extract images from a PDF file? What I'm looking to do is use pdflib_py to open large PDF files on our Linux servers, then use PIL to verify image data. I want to do this in order to find corrupt images in the PDF files. If anyone could help me out, or point me in the right direction, it would be most appreciated! Also, does anyone know of a way to validate a PDF file? Thanks in advance, Doug There is some discussion here: http://nedbatchelder.com/blog/200712.html#e20071210T064608 max -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting Excel time-format (hours since 1.1.1901)
Dirk Hagemann [EMAIL PROTECTED] wrote: Dirk Additional to my last posting: if you want to try this out in Excel you should replace the command REST by the english command what should be something like remainder. The equivalent in my (U.S. English, 2000) version of excel is called 'MOD'. Also, you have misread or miscopied something, or are encountering some very strange issue, as when I put your formula in excel, I get the following output: 11/27/2307 7:00 max -- http://mail.python.org/mailman/listinfo/python-list
Re: matching a street address with regular expressions
Andy Cheesman [EMAIL PROTECTED] wrote: Check out kodos http://kodos.sourceforge.net/ for an interactive python regexp tester Andy On systems with tkinter installed(So pretty much all Windows and lots and lots of Linux systems), the redemo.py script in the Tools/Scripts directory of the python installation will be a little quicker to get running. max -- http://mail.python.org/mailman/listinfo/python-list
Re: setuptools without unexpected downloads
Gabriel Genellina [EMAIL PROTECTED] wrote: ... This recent blog post contains step-by-step instructions on using free tools to compile python extensions: http://boodebr.org/main/python/build-windows-extensions -- ... The package available here: http://www.develer.com/oss/GccWinBinaries is quite a lot more straightforward. You do have to be okay with using GCC 4.1 though. As a bonus, it supports versions of python that link against several different versions of the Microsoft runtime, rather than just one. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Python command line error
Mick Duprez [EMAIL PROTECTED] wrote: Hi All, I've installed Python 2.5 on a number of machines but on one I'm having problems with the CLI. If I fire up the 'cmd' dos box and type 'python' I get a line of gibberish and it locks up the cli, if I run the 'command' dos box I get a few lines of garbage and it crashes/closes the dos box. I've tried a re-install, checked my system paths etc but I can't get it to work, it works ok for running scripts from a dbl click in explorer for instance and from Idle, I just can't run scripts from the command line. I have installed - xp pro sp2 Python25 wxPython2.8 unicode PIL numpy any clues to what's causing this behavior? tia, Mick. What kind of gibberish? Actual garbage characters and the like? Anyway, maybe try running which; this one should be easy to get going: http://gnuwin32.sourceforge.net/packages/which.htm But I have never used it, I use the one in this package: http://unxutils.sourceforge.net/ It expects 'python.exe' or whatever, not just 'python', I would expect the gnuwin32 version to behave similarly. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Installation of eyeD3 on Windows (newbie)
[EMAIL PROTECTED] wrote: I would highly appreciate if someone could help me with how to proceed (step-by-step) to get started and use the eyeD3 library in Windows? Many thanks in advance! It appears that you need to do as follows: Extract the tar.gz to a temporary directory. rename 'eyeD3-6.13\src\eyeD3\__init__.py.in' to 'eyeD3-6.13\src\eyeD3\__init__.py' run 'python setup.py.in install' from the eyeD3-6.13 directory. (It appears you may have extracted the files into the site-packages directory; if so, move them somewhere else before running the commands.) I have just done this and from eyeD3.tag import * completes successfully. There is some reference to a C library in the build files, but no importing of it in the source code, so this might just make it appear to install but not actually work, I don't know. The steps I outlined only install the library, the eyeD3 utility is not installed. If you want to use it, you need to drop it somewhere in your path and give windows some way to find it, by wrapping it in a batch file or renaming it to eyeD3.py and making .py files executable or whatever. You might also give mutagen a look, I settled on it last time I went looking for an id3 library: http://www.sacredchao.net/quodlibet/wiki/Development/Mutagen (I was not using if for writing though) max -- http://mail.python.org/mailman/listinfo/python-list
Re: Do other Python GUI toolkits require this?
Antoon Pardon [EMAIL PROTECTED] wrote: On 2007-04-20, Max Erickson [EMAIL PROTECTED] wrote: If we are being pedantic about describing a curve that shows the progress of a person in learning a topic, there is no arguing with you, a steep curve describes fast uptake and is a good thing. If we are being pedantic about what a learning curve describes, it seems possible that it describes the rate of knowledge uptake required to master a given topic, and that such a learning curve could exclude people that were unable to take in knowledge at that rate(for whatever reason) from mastering that topic, making it reasonable to describe such a topic as both 'hard' and 'having a steep learning curve'. I must confess I don't follow you here. A rate is a single number. Now some second variable can be a function of this rate or vice versa but I can't make out what this second variable is supposed to be from your explanation. I'm stopping after this because it is offtopic noise, but take a graph of position vs time for an object; the slope of that graph happens to be related to the velocity of the object, so you can 'see' the velocity of the object even though the graph is of position and time. The slope of the graph can be said to describe a rate. (and a graph that showed the movement of the world around that object would be quite different, and similar lines on those different graphs would thus elecit rather different descriptions, which is the point, pretending that all graphs of learning curves only describe what you assume they describe and then being pedantic about what information can be inferred from the graphs isn't going to get you anywhere, hence this thread) My english is full of colloquialisms and idioms and I am not interested in learning Antoon Pardon's Dictionary of Exact Usage, so I fear that further explanation will be fruitless. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Do other Python GUI toolkits require this?
Antoon Pardon [EMAIL PROTECTED] wrote: Just asserting how something can make a difference withouth arguing how in the particular case it actucally makes a difference is just a divertion tactic without real merrit. In the face of a notion that all steep curves determining progress made in something must be good I stand with my mouth agape. I am aware that common usage does not concur with academic rigor, but in this particular instance I'm with the common herd. Well that notion is entirely yours. My notion was only that progres in productivity, earnings and learning was good and thus that curves that are to be prefered tend to be the same shape for those three subjects. If we are being pedantic about describing a curve that shows the progress of a person in learning a topic, there is no arguing with you, a steep curve describes fast uptake and is a good thing. If we are being pedantic about what a learning curve describes, it seems possible that it describes the rate of knowledge uptake required to master a given topic, and that such a learning curve could exclude people that were unable to take in knowledge at that rate(for whatever reason) from mastering that topic, making it reasonable to describe such a topic as both 'hard' and 'having a steep learning curve'. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Python Web Servers and Page Retrievers
Collin Stocks [EMAIL PROTECTED] wrote:
--=_Part_19087_21002019.1176329323968
I tried it, and when checking it using a proxy, saw that it
didn't really work, at least in the version that I have (urllib
v1.17 and urllib2 v2.5). It just added that header onto the end,
therefore making there two User-Agent headers, each with
different values. I might add that my script IS able to retrieve
search pages from Google, whereas both urllibs are FORBIDDEN with
the headers that they use.
I don't know enough about either library to argue about it, but here
is what I get following the Dive Into Python example(but hitting
google for a search):
import urllib2
opener=urllib2.build_opener()
request=urllib2.Request('http://www.google.com/search?
q=tesla+battery')
request.add_header('User-Agent','OpenAnything/1.0
+http://diveintopython.org/')
data=opener.open(request).read()
data
'htmlheadmeta http-equiv=content-type content=text/html;
charset=ISO-8859-1titletesla battery - Google Search/title
[snip rest of results page]
This is with python 2.5 on windows.
max
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Re: Python Web Servers and Page Retrievers
Subscriber123 [EMAIL PROTECTED] wrote: urllib, or urllib2 for advanced users. For example, you can easily set your own headers when retrieving and serving pages, such as the User-Agent header which you cannot set in either urllib or urllib2. Sure you can. See: http://www.diveintopython.org/http_web_services/user_agent.html (though the behavior was changed for python 2.3 to make setting the user agent work better) max -- http://mail.python.org/mailman/listinfo/python-list
Re: How to find tag to /tag HTML strings and 'save' them?
John Nagle [EMAIL PROTECTED] wrote:
htags = soup.findAll({'h2':True, 'H2' : True}) # get all H2 tags,
both cases
Have you been bitten by this? When I read this, I was operating under
the assumption that BeautifulSoup wasn't case sensitive, and then I
tried this:
import BeautifulSoup as BS
soup=BS.BeautifulSoup('bone/bBtwo/B')
soup.findAll('b')
[bone/b, btwo/b]
soup.findAll({'b':True})
[bone/b, btwo/b]
So I am a little curious.
max
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Re: Join strings - very simple Q.
7stud [EMAIL PROTECTED] wrote:
On Mar 24, 8:30 am, Duncan Booth [EMAIL PROTECTED]
wrote:
In case you are feeling that the ','.join(l) looks a bit
jarring, be aware that there are alternative ways to write it.
You can call the method on the class rather than the instance:
jl = str.join(',', l)
jl = unicode.join(u'\u00d7', 'l')
... the catch is you need to know
the type of the separator in advance.
When I try the latter example, I get an error:
lst = [hello, world]
print unicode.join(u\u00d7, lst)
Traceback (most recent call last):
File test1.py, line 2, in ?
print unicode.join(u\u00d7, lst)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xd7'
in position 5: ordinal not in range(128)
Your terminal is likely the problem. Get rid of the print:
q=unicode.join(u'\u00d7',['hello','world'])
and you will probably get rid of the exception.
(so I guess the issue is the display, not the logic)
max
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Re: Idiom for running compiled python scripts?
Mark [EMAIL PROTECTED] wrote: ... #!/usr/bin/env python from myprog import main if __name__ == __main__: main() Of course this compiles myprog.py into myprog.pyc on first run as I am wanting. I have one of these stubs for all my python scripts I've created so far. Is there not a better way? Do I have to create a separate stub each time? I find it a bit messy to require a pair of scripts for each utility and it also contributes some inefficiency. Given the above stub is so boilerplate, why does python not provide a general stub/utility mechanism for this? I don't know of a better way to organize things, but as an alternative, you could have a script where you import each of the scripts that you want compiled, python will write the compiled files to disk when you run it(thus avoiding the need to split the other scripts). There are also the py_compile and compileall modules, which have facilities for generating byte code. More here: http://effbot.org/zone/python-compile.htm under 'Compiling python modules to byte code'. max -- http://mail.python.org/mailman/listinfo/python-list
Re: help!! *extra* tricky web page to extract data from...
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote: How extract the visible numerical data from this Microsoft financial web site? http://tinyurl.com/yw2w4h If you simply download the HTML file you'll see the data is *not* embedded in it but loaded from some other file. Surely if I can see the data in my browser I can grab it somehow right in a Python script? Any help greatly appreciated. Sincerely, Chris The url for the data is in an iframe. If you need to scrape the original page for some reason(instead of iframe url directly), you can use urlparse.urljoin to resolve the relative url. max -- http://mail.python.org/mailman/listinfo/python-list
Re: PIL: reading bytes from Image
cyberco [EMAIL PROTECTED] wrote:
Thanks,
I've tried the StringIO option as follows:
=
img = Image.open('/some/path/img.jpg')
img.thumbnail((640,480))
file = StringIO, StringIO()
Is the above line exactly what you tried? If it is, the comma and
space in the line are likely the problem. Try either:
from StringIO import StringIO
file=StringIO()
or
import StringIO
file=StringIO.StringIO()
(using file as a variable name can cause issues if you later want
access to the built in object 'file')
The following:
import Image
import StringIO
im=Image.new('RGB', (100,100))
fp=StringIO.StringIO()
im.save(fp, 'jpeg')
len(fp.getvalue())
823
Works for me on python 2.5 on windows.
max
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Re: PIL: reading bytes from Image
cyberco [EMAIL PROTECTED] wrote: I'm using web.py to send an image to the client. This works (shortened): print open(path, rb).read() but this doesn't: img = Image.open(path) img.thumbnail((10,10)) print img.getdata() or print img.load() How do I get the bytes of the Image object? 'getdata()' seemed the way, but unfortunately... getdata() returns the data in a PIL format. Saving the image, in a format your client understands, to a file like object like StringIO.StringIO is an easy path to take. Sparklines shows this in action: http://bitworking.org/projects/sparklines/ max -- http://mail.python.org/mailman/listinfo/python-list
Re: Alternatives for Extracting EXIF and JPEG Data from Images
Roger [EMAIL PROTECTED] wrote:
Does anybody have a pointer to a Python library/utility that will
extract the chrominance and luminance quantization tables from
JPG images?
I have been using the _getexif method from PIL, which works fine,
but doesn't extract the quantization data. I am a bit fuzzy on
the terminology, but the quantization data seems to be JPEG data
rather than EXIF data. One utility that extracts the
quantization tables is JPEGsnoop -- there is a link to download
the utility here:
http://www.impulseadventure.com/photo/jpeg-quantization.html
The source code for the above isn't available and may not be
callable from a Python script even if it were available.
Roger
I don't know what the format is, etc, but jpegs I open with PIL have a
quantization attribute, e.g:
im.quantization
{0: array('b', [6, 4, 4, 5, 4, 4, 6, 5, 5, 5, 6, 6, 6, 7, 9, 14, 9, 9,
8, 8, 9, 18, 13, 13, 10, 14, 21, 18, 22, 22, 21, 18, 20, 20, 23, 26,
33, 28,
snip a bunch more numbers
max
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Re: PyCon blogs?
[EMAIL PROTECTED] wrote: Was anybody blogging about PyCon (talks and/or sprints)? Got any pointers? Thanks, Skip In no particular order: http://www.nedbatchelder.com/blog/20070226T075948.html http://www.oreillynet.com/onlamp/blog/2007/02/pycon_day_1_1.html http://wamber.net/PyCon-2007/ max -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib2 and HTTPBasicAuthHandler
m.banaouas [EMAIL PROTECTED] wrote: Hi all, I started to use urllib2 library and HTTPBasicAuthHandler class in order to authenticate with a http server (Zope in this case). I don't know why but it doesn't work, while authenticating with direct headers manipulation works fine! ... port':'8080','path':'manage','realm':'Zope'} url = '%(prot)s://%(host)s:%(port)s/%(path)s' % data ... Are you certain that the realm on the server matches 'Zope'? HTTPBasicAuthHandler uses the realm to look for the password, if the realm the server provides is different, urllib2 will respond as if it does not have a user/password. If you are only doing one request, it isn't that big a deal; if you are doing many requests or want urllib2 to handle the response for other reseans, you can use a default realm, see the bottom of this example: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305288 (The advantage of using a default rather than making sure the realm is correct is that it can change and you won't have to do anything) max -- http://mail.python.org/mailman/listinfo/python-list
Re: urllib2 and HTTPBasicAuthHandler
m.banaouas [EMAIL PROTECTED] wrote: ... passman.add_password(None, auth_url, data['user'] , ... The only thing I can come up with is that auth_url can't begin with a protocol, like http:// or whatever. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Universal Feed Parser - How do I keep attributes?
Gabriel Genellina [EMAIL PROTECTED] wrote:
At Wednesday 10/1/2007 14:38, [EMAIL PROTECTED] wrote:
d =
feedparser.parse('http://weather.yahooapis.com/forecastrss?p=
94089')
d.feed.yweather_location
u''
You have to feed it the *contents* of the page, not its URL.
The online documentation disagrees with you:
http://feedparser.org/docs/introduction.html
max
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Re: recursive function
cesco [EMAIL PROTECTED] wrote:
Hi,
I have a dictionary of lists of tuples like in the following
example: dict = {1: [(3, 4), (5, 8)],
2: [(5, 4), (21, 3), (19, 2)],
3: [(16, 1), (0, 2), (1, 2), (3, 4)]]
In this case I have three lists inside the dict but this number
is known only at runtime. I have to write a function that
considers all the possible combinations of tuples belonging to
the different lists and return a list of tuples of tuples for
which the sum of the first element of the most inner tuple is
equal to N.
For example, assuming N = 24, in this case it should return:
[((3, 4), (5, 4), (16, 1)), ((3, 4), (21, 3), (0, 2)), ((5, 8),
(19, 2), (0, 2))]
A simple list comprehension would be enough if only I knew the
number of keys/lists beforehand but this is not the case. I guess
I need a recursive function. Can anyone help?
Thanks in advance
Francesco
This thread is probably of interest:
http://groups.google.com/group/comp.lang.python/browse_frm/thread/f0c0
406fce981a54/59a2a5dcd1507ab9#59a2a5dcd1507ab9
max
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Re: path.py and directory naming: trailing slash automatic?
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hi,
I'm a big fan of path.py. One thing that I think is a good idea
is for directories to automatically have a slash appended to them
if it is not automatically added. Eg:
from path import path
dir = path('/some/dir')
x = dir + file # should yield /some/dir/file
I emailed the author of path.py but I think he must be extremely
busy. It took him 2-3 weeks to answer my first email and it's
been longer than that for the one I sent regarding this.
just use '/' if that is what you want:
from path import path
d=path('/some/dir')
d / file
path(u'/some/dir\\file')
If + also did that, it would be more difficult to change the extension
when renaming a file or whatever.
max
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Re: Py3K idea: why not drop the colon?
color='orange' if color=='red' or 'blue' or 'green': print Works? Works? -- http://mail.python.org/mailman/listinfo/python-list
Re: PIL - Pixel Level Image Manipulation?
Gregory Piñero [EMAIL PROTECTED] wrote: On 11/8/06, Gregory Piñero [EMAIL PROTECTED] wrote: I want to be able to randomly change pixels in an image and view the results. I can use whatever format of image makes this easiest, e.g., gray scale, bit tonal, etc. Ideally I'd like to keep the pixels in an intermediate format like a list of (integers?) or an array and convert that to an image as needed. I'm hoping someone has some experience on this and could offer some advice or code. I thought it would be easy in PIL but I'm not sure. I did find these functions after more searching: http://mail.python.org/pipermail/image-sig/2002-July/001914.html Perhaps I'll try those out tonight if I don't hear of anything better in the meantime. -Greg Maybe something of use at: http://online.effbot.org/2005_10_01_archive.htm#20051003 max -- http://mail.python.org/mailman/listinfo/python-list
Re: how do I pass values between classes?
kath [EMAIL PROTECTED] wrote: hi, Larry Bates thanks for the reply... You might consider doing it the same way wx passes things around. When you instantiate the subclass pass the parent class' instance as first argument to __init__ method. Yes thats absolutely right.. That way the subclass can easily pass values back to the parent by using that pointer. Could you please explain me this.. more clearly. I think it is much close to the solution. Thank you. regards, sudhir Somewhere in the child class: self.parent.do_something(something_to_do_it_with) -- http://mail.python.org/mailman/listinfo/python-list
Re: Converting a .dbf file to a CSV file
Johanna Pfalz [EMAIL PROTECTED] wrote: Is there a module/method in python to convert a file from .DBF format to .CSV format? Johanna Pfalz http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715 There is an example provided. max -- http://mail.python.org/mailman/listinfo/python-list
Re: question about True values
Steve Holden [EMAIL PROTECTED] wrote:
Gabriel Genellina wrote:
At Wednesday 25/10/2006 22:29, Terry Reedy wrote:
the string class's nil value. Each of the builtin types
has such an empty or nil value:
string
list[]
tuple ()
dict{}
int 0
float 0.0
complex 0j
set set()
Any other value besides the above will compare as not
false.
And today's question for the novices is: which Python type
did Skip
miss
from the above list?
more that one:
0L
decimal.Decimal(0) # is decimal.Decimal('0'), also
u''
array.array('c') # or any other typecode, I suspect, without
initializer
Just for fun:
buffer('')
frozenset()
iter(())
xrange(0)
There's still a very obvious omission ...
regards
Steve
bool.
unicode and long if you are fussy.
max
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Re: list comprehension (searching for onliners)
Gerardo Herzig [EMAIL PROTECTED] wrote:
Hi all: I have this list thing as a result of a db.query: (short
version) result = [{'service_id' : 1, 'value': 10},
{'service_id': 2, 'value': 5},
{'service_id': 1, 'value': 15},
{'service_id': 2, 'value': 15},
]
and so on...what i need to do is some list comprehension that
returns me something like
result = [
{
'service_id' : 1, 'values': [ {'value': 10},
{'value': 15}]
},
{
'service_id' : 2, 'values': [ {'value': 5},
{'value': 15}]
}
My problem now is i cant avoid have repeteated entries, lets
say, in this particular case, 2 entries for service_id = 1, and
other 2 for service_id =2.
Ill keeping blew off my hair and drinking more cofee while
searching for this damn onliner im looking for.
Thanks dudes.
Gerardo
Is three lines ok?
output=dict()
for record in result:
output.setdefault(record['service_id'], list()).append(record
['value'])
output
{1: [10, 15], 2: [5, 15]}
Creating the more verbose output that you specified should be
pretty straighforward from there.
max
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Re: wxPython help wxSashWindow
MatthewWarren [EMAIL PROTECTED] wrote: Thanks, is that a newsgroup I can view through google groups? I tried seraching for it but google says no.. And I'll give that list a subscribe. I have found a wxPython google group, but only 11 members and a handfull of posts in a year... Gmane archives many mailing lists and also allows access to the lists through a news server gateway(news.gmane.org). Posting throught the news gateway is allowed for many groups(including this one), but not all. For more information and web access to the archives, visit http://gmane.org. max -- http://mail.python.org/mailman/listinfo/python-list
Re: advice for web-based image annotation
Brian Blais [EMAIL PROTECTED] wrote: Hello, I want to set up a system where I can have my family members write comments about a number of pictures, as part of a family tree project. Essentially, I want them to be able to log into a website (I already have the webspace, and the server runs python, but not mod_python), see images, and be able to fill in text boxes for comments and enter dates for the pictures. These comments and dates will then be viewable by the others logging in, so that I can keep track of collect stories, details, dates, etc...and also, who is writing what, when. I've written some basic CGI python scripts, and can imagine how to do this, but I was wondering if it would better to look into a framework like cherrypy, turbogears, zope, etc. I have never done any database programming, but have written CGI scripts to modify excel sheets and text files to store state. I am not adverse to learning the database end, but I don't want to climb that hill unless I feel there is a significant benefit. I don't have admin rights on the server, if that makes a difference. Any suggestions would be greatly appreciated! thanks, Brian Blais You might want to look at gallery: http://gallery.menalto.com/ It is big and heavy and php, but it has most of what you want, an image gallery with user permissions and comments. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Attribute error
Teja [EMAIL PROTECTED] wrote: Hi all, What is attribute error? what causes that error, especially with COM objects? To be precise : Attribute Error: LCAS.LabcarController.writeLogWindow() Here, LCAS is a COM object Thanks Teja.P LabcarController might be a function. See: http://groups.google.com/group/comp.lang.python/msg/d7341f1aedcae6d3 for more detail. hope this helps, max -- http://mail.python.org/mailman/listinfo/python-list
Re: Ok. This IS homework ...
spawn [EMAIL PROTECTED] wrote: but I've been struggling with this for far too long and I'm about to start beating my head against the wall. -- I tried adding an additional while statement to capture the second number, but it didn't seem to solve my problem. Help! Reread whatever material you have about while loops, or just consult the python documentation, and then think about why your program(as posted anyway) is never printing done. Hope this isn't too much help, max -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with the 'math' module in 2.5?
Chris [EMAIL PROTECTED] wrote: from math import * sin(0) 0.0 sin(pi) 1.2246063538223773e-016 sin(2*pi) -2.4492127076447545e-016 cos(0) 1.0 cos(pi) -1.0 cos(2*pi) 1.0 The cosine function works fine, but I'm getting weird answers for sine. Is this a bug? Am I doing something wrong? From help(math) in an interactive window: DESCRIPTION This module is always available. It provides access to the mathematical functions defined by the C standard. So what you are seeing is the behavior of the C library being exposed. Try sin(pi*0.5) to see similar behavior to cos(pi) or cos(pi*2). -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with the 'math' module in 2.5?
Max Erickson [EMAIL PROTECTED] wrote: Try sin(pi*0.5) to see similar behavior to cos(pi) or cos(pi*2). Uhh, switch that, cos(pi*0.5)... -- http://mail.python.org/mailman/listinfo/python-list
Re: MP3 files and Python...
Karlo Lozovina [EMAIL PROTECTED] wrote: I'm looking for a Python lib which can read and _write_ ID3v1 and ID3v2 tags, and as well read as much as possible data from MP3 file (size, bitrate, samplerate, etc...). MP3 reproduction is of no importance... Try mutagen: http://www.sacredchao.net/quodlibet/ -- http://mail.python.org/mailman/listinfo/python-list
Re: changing a file's permissions
James [EMAIL PROTECTED] wrote: --=_Part_63041_761240.1159752399799 I'm writing a script in linux to excercise my python skills and have encountered a minor issue. Writing the script and creating an ouput file was simple enough and didn't take too long. However, I don't have permissions to execute the file by default. Now, I could simply chmod 755 the sucker and have done with it, but I want to apply the permissions within the python script if I can. So my question is: how does one change a file's permissions inside of python? James Assuming you want to operate on the output file: import os os.chmod(path, 755) Hope this helps, max -- http://mail.python.org/mailman/listinfo/python-list
Re: Is it possible to change a picture resolution with Python?
Lad [EMAIL PROTECTED] wrote:
from
image:
http://www.pythonware.com/library/pil/handbook/image.htm
This is some example code:
from PIL import Image
im = Image.open(1.jpg)
nx, ny = im.size
im2 = im.resize((int(nx*1.5), int(ny*1.5)), Image.BICUBIC)
im2.save(2.png)
Bye,
bearophile,
Thank you for your reply.
But the above code increases size only , but not DPI resolutions(
vertical nad horizontal).I need a higher vertical and horisontal
resolutions.
Any idea how to do that?
Thank you
If you just want to change the dpi flag that some software uses to
interpret the size of the image when rendering it, something like:
im.save('c:/tmp/out.jpg', dpi=(100,100))
might work. You can get lots of info on why this doesn't really change
the resolution of the image from google.
max
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Re: Eval (was Re: Question about the use of python as a scripting language)
[EMAIL PROTECTED] wrote: Brendon A shortcut occurs to me; maybe someone can tell me what's wrong Brendon with my reasoning here. It seems that any string that is unsafe Brendon to pass to eval() must involve a function call, and thus must Brendon contain an opening paren. Given that I know that the data I Brendon expect contains no parens, would people expect this code to be Brendon safe: Unfortunately, no. If I define a class which has properties, attribute assignment can involve arbitrary numbers of function calls. Skip Is it possible to define a class and create an instance without using an open parens? I don't know how, but that isn't saying a great deal... max -- http://mail.python.org/mailman/listinfo/python-list
Re: class return another instance
Keith [EMAIL PROTECTED] wrote:
Any help would be great.
Cheers,
Keith
Do you absolutely need the functionality to be in the __init__ method,
or does something like the following work:
IDs={}
class ID: pass
def factory(ident):
if ident in IDs:
instance=IDs[ident]
else:
instance=ID()
IDs[ident]=instance
return instance
g=factory(1)
h=factory(2)
i=factory(1)
g,h,i
(__main__.ID instance at 0x00A45FD0, __main__.ID instance at
0x00A4B918, __main__.ID instance at 0x00A45FD0)
max
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Re: Unicode question
Ben Edwards (lists) [EMAIL PROTECTED] wrote: I am using python 2.4 on Ubuntu dapper, I am working through Dive into Python. ... Any insight? Ben Did you follow all the instructions, or did you try to call sys.setdefaultencoding interactively? See: http://diveintopython.org/xml_processing/unicode.html#kgp.unicode.4.1 hope this helps, max -- http://mail.python.org/mailman/listinfo/python-list
Re: code is data
Anton Vredegoor [EMAIL PROTECTED] wrote: However, I knew of the existence of such languages but I am mostly interested in standardized code interchange, like for example with JSONP which fetches some external javascriptcode from another server using JSON and places the translated javascript into a webpage at the request of the clients browser or so it seems. Maybe a Python webserver could also emit pieces of javascript code by getting them from a *Python* code library after translating Python code on the fly? Anton I have no idea how close it is to what you are talking about, but pypy does have some sort of python-javascript support: http://codespeak.net/pypy/dist/pypy/doc/getting- started.html#translating-the-flow-graph-to-javascript-code About two thirds down, if the above link is broken: http://codespeak.net/pypy/dist/pypy/doc/getting-started.html max -- http://mail.python.org/mailman/listinfo/python-list
Re: very strange bug coercing to Unicode: need string or buffer, int found
bussiere maillist [EMAIL PROTECTED] wrote: --=_Part_118629_1441854.1150895040355 i truly didn't understand this error : Traceback (most recent call last): File D:\Programmation\FrancePaquet\FrancePaquet.py, line 77, in ? cabtri = zz + chiffrescabtri + clefc TypeError: coercing to Unicode: need string or buffer, int found def calculclef(nombre): if clef == 10: clef = 0 return clef clefb = calculclef(debutplage) clefb = str(clefb) print clefb clefc = calculclef(chiffrescabtri) cabtri = zz + chiffrescabtri + clefc Your calculclef function returns an integer. You explitly convert clefb into a string, but you never convert clefc into a string, hence the TypeError. max -- http://mail.python.org/mailman/listinfo/python-list
Re: mapping None values to ''
Roberto Bonvallet [EMAIL PROTECTED] wrote: You don't need map when using list comprehensions: [ for i in [a, b, c] if i in (None, None)] That loses list elements that aren't in the tests: a=7 b=None c=None [ for i in [a,b,c] if i in (None,None)] ['', ''] max -- http://mail.python.org/mailman/listinfo/python-list
Re: Package
I'm no expert, but your post made me curious. It appears that __all__ has the effect of ensuring that from test import * picks up test1, but doesn't go any further than that. from test.test1.test2 import * should cause test3 to be imported. max -- http://mail.python.org/mailman/listinfo/python-list
Re: argmax
David Isaac [EMAIL PROTECTED] wrote: 1. Why is there no argmax built-in? (This would return the index of the largest element in a sequence.) 2. Is this a good argmax (as long as I know the iterable is finite)? def argmax(iterable): return max(izip( iterable, count() ))[1] use len: len(iterable)-1 max -- http://mail.python.org/mailman/listinfo/python-list
Re: Variable name has a typo, but code still works. Why?
mateus [EMAIL PROTECTED] wrote: print hello world I have a nested loop where the outer loop iterates over key value pairs of a dictionary and the inner loop iterates over a list each list of which is a mapped value from the dictionary def showReport(self): for dev, sessions in self.logger.items(): for tree in session: self.addTestItem(self, tree) What I don't understand is why this executes w/o any problems when sessions was spelled as plural (sessionS) while later being spelled in the singular (session). Is there some type of name resolution of local variables where Python makes assumptions? Is self.logger.items() empty? This does not raise a NameError even when 'explode' is not defined: for x in []: explode max -- http://mail.python.org/mailman/listinfo/python-list
Re: create a text file
per9000 [EMAIL PROTECTED] wrote:
# w is for writing
myfile = open('theoutfile',w)
That won't work, the second argument to open needs to be a string:
myfile = open('theoutfile', 'w')
max
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Re: create a text file
Fredrik Lundh [EMAIL PROTECTED] wrote:
Max Erickson wrote:
# w is for writing
myfile = open('theoutfile',w)
That won't work, the second argument to open needs to be a string:
w = 'w'
/F
Is it inappropriate to call the w on the left side of the equal's sign
a string? I.e., w refers to a string(object) that contains 'w'?
My goal was to point out that the code would not work as posted.
max
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Re: regex/lambda black magic
Andrew Robert [EMAIL PROTECTED] wrote:
ValueError: invalid literal for int(): %
Does anyone see what I am doing wrong?
Try getting rid of the lamba, it might make things clearer and it
simplifies debugging. Something like(this is just a sketch):
def callback(match):
print match.group()
return chr(int(match.group(),16)) % ord(match.group())
output.write(re.sub('r([^\w\s])', callback, line)
It looks like your match.group is a '%' character:
int('%', 16)
Traceback (most recent call last):
File pyshell#108, line 1, in ?
int('%', 16)
ValueError: invalid literal for int(): %
max
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Re: regex/lambda black magic
Andrew Robert [EMAIL PROTECTED] wrote: import re,base64 # Evaluate captured character as hex def ret_hex(value): return base64.b16encode(value) def ret_ascii(value): return base64.b16decode(value) Note that you can just do this: from base64 import b16encode,b16decode and use them directly, or ret_hex=base64.b16encode ret_ascii=base64.b16decode if you want different names. As far as the rest of your problem goes, I only see one pass being made, is the code you posted the code you are running? Also, is there some reason that base64.b16encode should be returning a string that starts with a '%'? All I would expect is: base64.b16decode(base64.b16encode(input))==input other than that I have no idea about the expected behavior. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Accessing object parent properties
One way: class Boo: def __init__(self, parent): self.parent=parent class Foo: X=1 def __init__(self): self.test=boo(self) -- http://mail.python.org/mailman/listinfo/python-list
Re: Which is More Efficient?
Dustan [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: The task manager says CPU Usage: 100% when the program is running, and only when the program is running. Efficiency is a measure of 2 things: CPU usage and time. If you measure just time, you're not necessarily getting the efficiency. A lot of people, when they say 'uses a lot of CPU' are leaving off 'time'. I.e., CPU usage is pretty much talked about in terms of cycles, which is roughly utilization*time. Profiling tools often report both clock time and cpu time. Cpu time is a rough analog for cycles, clock time is self explanatory. max -- http://mail.python.org/mailman/listinfo/python-list
Re: altering an object as you iterate over it?
Bruno Desthuilliers wrote It has been, at a time, recommended to use file() instead of open(). Don't worry, open() is ok - and I guess almost anyone uses it. http://mail.python.org/pipermail/python-dev/2005-December/059073.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Option parser question - reading options from file as well as command line
Andrew Robert [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Hi Everyone. I tried the following to get input into optionparser from either a file or command line. The code below detects the passed file argument and prints the file contents but the individual swithces do not get passed to option parser. Doing a test print of options.qmanager shows it unassigned. Any ideas? Check parser.usage, it is likely to look a lot like your infile. I'm not sure, but I think you need to pass your alternative arguments to parser.parse_args. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Option parser question - reading options from file as well as command line
Andrew Robert [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
Any ideas?
I don't know much about optparse, but since I was bored:
help(o.parse_args)
Help on method parse_args in module optparse:
parse_args(self, args=None, values=None) method of
optparse.OptionParser instance
parse_args(args : [string] = sys.argv[1:],
values : Values = None)
- (values : Values, args : [string])
Parse the command-line options found in 'args' (default:
sys.argv[1:]). Any errors result in a call to 'error()', which
by default prints the usage message to stderr and calls
sys.exit() with an error message. On success returns a pair
(values, args) where 'values' is an Values instance (with all
your option values) and 'args' is the list of arguments left
over after parsing options.
o.parse_args('seven')
Traceback (most recent call last):
File pyshell#15, line 1, in ?
o.parse_args('seven')
File C:\bin\Python24\lib\optparse.py, line 1275, in parse_args
stop = self._process_args(largs, rargs, values)
File C:\bin\Python24\lib\optparse.py, line 1322, in _process_args
del rargs[0]
TypeError: object doesn't support item deletion
That's the result of poking an optionParser instance in Idle.
parse_args is expecting something that looks like sys.argv[1:], which
is a list. You are passing it a string.
max
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Re: cross platform libraries
[EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: I went to this webpage http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/360649 Isn't it supposed to run on the network and close the connected machine. That code uses the windows libraries on the machine it is run on to generate a request to the networked machine to shutdown. The code executes locally and sends the request over the network. Every help is appreciate, If you have some way of remotely running programs on the windows machine(ssh, telnet, etc.), you might try pstools: http://www.sysinternals.com/Utilities/PsTools.html specifically, psshutdown. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Need help removing list elements.
[EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: But this gives me IndexError: list out of range You are making the list shorter as you are iterating. By the time your index is at the end of the original list, it isn't that long any more. Creating a new list and appending the elements you want to keep avoids the problem. Or you can just use a list comprehension(untested): returned_lines=[line for line in open(lines.txt, 'rb') if line != ] or just returned_lines=[line for line in open(lines.txt) if line] max -- http://mail.python.org/mailman/listinfo/python-list
Re: Is Python a Zen language?
Given that python code is often described in terms of being 'pythonic' or not, and that pythonic is a term that is apparently well agreed upon yet seemingly impossible to define for someone who does not already understand the word, python is probably a zen language. max -- http://mail.python.org/mailman/listinfo/python-list
Re: How to I write DBASE files without ODBC
Durumdara [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Can anybody known about DBASE handler module for Python ? http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/362715 max -- http://mail.python.org/mailman/listinfo/python-list
Re: How to generate graphics dynamically on the web using Python CGI script?
Sparklines is a script that does exactly what you are asking using python and PIL: http://bitworking.org/projects/sparklines/ max -- http://mail.python.org/mailman/listinfo/python-list
Re: OT: excellent book on information theory
Steve Holden [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Grant Edwards wrote: On 2006-01-16, Tim Peters [EMAIL PROTECTED] wrote: http://www.inference.phy.cam.ac.uk/mackay/itila/Potter.html [Grant Edwards] That made me smile on a Monday morning (not an insignificant accomplishment). I noticed in the one footnote that the H.P. book had been translated into American. I've always wondered about that. I noticed several spots in the H.P. books where the dialog seemed wrong: the kids were using American rather than British English. I thought it rather jarring. You should enjoy: http://www.hp-lexicon.org/about/books/differences.html Very interesting. And rather sad that editors think the average Amermican reader too dim-witted to figure out (in context, even) that a car park is a parking lot and a dustbin is a trash can. They know that the average American could work it out. They also know that the average American doesn't like to do anything remotely like hard thinking, hence they make these changes so the books don't read like foreign literature. regards Steve A rather less cynical interpretation is that they are attempting to make a children's book accessible to as many children as possible, i.e., the youngest readers as is practical. I don't mean to disparage the book by calling it a children's book, I have read and enjoyed several of them, but the target audience for the books is clearly kids. max -- http://mail.python.org/mailman/listinfo/python-list
Re: Decimal ROUND_HALF_EVEN Default
3c273 [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Hello, I'm just curious as to why the default rounding in the decimal module is ROUND_HALF_EVEN instead of ROUND_HALF_UP. All of the decimal arithmetic I do is rounded half up and I can't think of why one might use round half even. I googled a bit and didn't really find a good answer. Any insight is appreciated. Louis see http://www2.hursley.ibm.com/decimal/damodel.html#refdefcont decimal.py was written following the specification at http://www2.hursley.ibm.com/decimal/decarith.html max -- http://mail.python.org/mailman/listinfo/python-list
Re: Recursive tree list from dictionary
David Pratt [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
Hi. I am wanting to create a tree list result structure from a
dictionary to categorize results. The dictionary contains elements
that identify its parent. The levels of categorization is not fixed,
so there is a need for the code to be recursive to drill down to the
lowest level. I have contrived a small source and result list to
illustrate:
imd=dict()
for d in source_list:
par=d['parent']
v=d['title']
try:
imd[par].append(v)
except:
imd[par]=[v]
imd
{'Project': ['Geometries', 'Verticals'], 'Geometry': ['Points',
'Layers', 'Water'], 'root': ['Project', 'Geometry', 'Soil'], 'Soil':
['Soiltypes']}
And then do whatever you need to do from here...
max
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Re: Unicode Question
The encoding argument to unicode() is used to specify the encoding of the
string that you want to translate into unicode. The interpreter stores
unicode as unicode, it isn't encoded...
unicode('\xbe','cp1252')
u'\xbe'
unicode('\xbe','cp1252').encode('utf-8')
'\xc2\xbe'
max
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Re: Converting milliseconds to human time
the hard way(in that you have to do it yourself): def prntime(ms): s=ms/1000 m,s=divmod(s,60) h,m=divmod(m,60) d,h=divmod(h,24) return d,h,m,s print '%d days %d hours %d minutes %d seconds' % prntime(100) 0 days 0 hours 16 minutes 40 seconds print '%d days %d hours %d minutes %d seconds' % prntime(1000) 0 days 2 hours 46 minutes 40 seconds print '%d days %d hours %d minutes %d seconds' % prntime(1) 1 days 3 hours 46 minutes 40 seconds print '%d days %d hours %d minutes %d seconds' % prntime(10) 11 days 13 hours 46 minutes 40 seconds print '%d days %d hours %d minutes %d seconds' % prntime(418235000) 4 days 20 hours 10 minutes 35 seconds max -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie Question: CSV to XML
ProvoWallis [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
Hi,
I'm learning more and more about Python all the time but I'm still a
real newbie. I wrote this little script to convert CSV to XML and I
was
hoping to get some feedback on it if anyone was willing to comment.
It works but I was wondering if there was anything I could do better.
E.g., incorporate minidom somehow? But I'm totally in the dark as how
I
would do this.
Thanks,
Greg
###
#csv to XML conversion utility
import os, re, csv
root = raw_input(Enter the path where the program should run: )
fname = raw_input(Enter name of the uncoverted file: )
consider parsing the command line to get the file to convert, ie
csvtoxml.py FILE
searching on sys.argv, getopt and optparse will give you lots of info on
this.
for row in reader:
for i in range(0, len(row)):
if i == 0:
output.write('\nrow\nentry
colname=col%s%s/entry' % (i, row[i]))
if i 0 and i len(row) - 1:
output.write('\nentry colname=col%s%s/entry' %
(i,
row[i]))
if i == len(row) - 1:
output.write('\nentry
colname=col%s%s/entry\n/row' % (i, row[i]))
instead of testing for the first and last rows, just write the row
stuff in the outer loop. Untested, but it should work the same...
for row in reader:
output.write('\nrow')
for i, cell in enumerate(row):
output.write('\nentry colname=col%s%s/entry' % (i,cell)
output.write('\n/row')
max
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Re: New to Python, WxPython etc, etc
rodmc [EMAIL PROTECTED] wrote in news:1136299565.613252.202670 @g44g2000cwa.googlegroups.com: import _gaim import wx from wxPython.wx import * ID_ABOUT = 101 ID_EXIT = 102 class MyFrame(wxFrame): def __init__(self, parent, ID, title): I don't have an answer to your question, but as an aside, you should think about using the wx namespace if you move forward with wxPython. Basically, you would just eliminate 'from wxPython.wx import *' as you are already importing wx. Then, instead of referring to wxFrame, you would refer to wx.Frame. See: http://www.wxpython.org/MigrationGuide.html#the-wx-namespace for more information about this. Max -- http://mail.python.org/mailman/listinfo/python-list
Re: Accessing next/prev element while for looping
j is a built-in object used to make complex numbers. Or at least it was, until you rebound it to the current element from myarray. That's bad practice, but since using complex numbers is rather unusual, one you will probably get away with. Is it? j Traceback (most recent call last): File pyshell#0, line 1, in -toplevel- j NameError: name 'j' is not defined 1 + 2j (1+2j) j=4 1 + 2j (1+2j) I am actually curious, as it doesn't appear to be, but you are usually 'right' when you say such things... Max -- http://mail.python.org/mailman/listinfo/python-list
Re: tutorial example
Not in python. For example, what would you call the following? def rsum(n, m): print n+m return n+m In python a method is callable attached to an object. A function is a callable object constructed with a def statement. max -- http://mail.python.org/mailman/listinfo/python-list
Re: tutorial example
import math def distance1(x1, y1, x2, y2): dx = x2 - x1 dy = y2 - y1 dsquared = dx**2 + dy**2 result = math.sqrt(dsquared) print result return result def distance2(x1, y1, x2, y2): dx = x2 - x1 dy = y2 - y1 dsquared = dx**2 + dy**2 result = math.sqrt(dsquared) print result They don't do the same thing here... distance1(1,2,3,4) 2.82842712475 2.8284271247461903 distance2(1,2,3,4) 2.82842712475 the 'return result' line passes the result object in the function back to where the function was called. Functions without a return statement default to returning 'None'. Calling the functions within a print statement illustrates the difference: print distance1(1,2,3,4) 2.82842712475 2.82842712475 print distance2(1,2,3,4) 2.82842712475 None As you can see, distance2 does not actually return the result of the calculation to the interactive prompt... max -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython newbie question, creating mega widgets , and DnD
[EMAIL PROTECTED] [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: A side question - why is their a EVT_LIST_BEGIN_DRAG but no EVT_LIST_END_DRAG, unlike tree's which have BEGIN and END? I need a draggable list box, and would prefer to not handle low level mouse events. My intuition(so take it with a grain of salt) says that it wouldn't make any sense for the list control to generate an event when the drag and drop lands on a different control. max -- http://mail.python.org/mailman/listinfo/python-list
Re: How to use writelines to append new lines to an existing file
Nico Grubert [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
Hi there,
I would like to open an existing file that contains some lines of
text in order to append a new line at the end of the content.
My first try was:
f = open('/tmp/myfile', 'w') #create new file for writing
f.writelines('123') #write first line
f.close()
f = open('/tmp/myfile', 'w') #open existing file to append
new line f.writelines('456')
f.close()
f = open('/tmp/myfile', 'r') # open file for reading
f.read()
'456'
I supposed to have:
f.read()
'123\n456\n'
Does f = open('/tmp/myfile', 'w') overwrite the existing file
or does f.writelines('456') replace the first line in the
existing file?
Nico
There is a good explanation in the tutorial:
http://docs.python.org/tut/node9.html#SECTION00920
and more detail is available in the docs for builtin functions:
http://docs.python.org/lib/built-in-funcs.html
(look under file() but probably still use open())
That said, open(file, 'a') will open an existing file to append.
max
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Re: Replacing an XML element?
Nick Vargish [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
I've been trying to figure out how to do something that seems
relatively simple, but it's just not coming together for me. I'm
hoping someone will deign to give me a little insight here.
The problem: We have XML documents that use a custom table format
that was designed primarily for typesetting documents. It's a
column-first oriented scheme, and now we need a way to convert
these table elements to HTML style row-first tables.
I would like to be able to do something like this:
doc = xml.dom.minidom.parse(input)
for table in doc.getElementsByTagName('COLTABLE'):
newtable = coltable_to_rowtable(table)
## this is what I can't figure out
doc.replace(table, newtable)
output.write(doc.toxml('utf-8'))
I'm pretty sure I'm missing something obvious, but haven't been
able to find any examples.
Someone please whack me with a cluestick,
Nick
table.parentNode.replaceChild(newtable, table)
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Re: web scrapping - POST and auto-login
james at hal-pc.org wrote in news:[EMAIL PROTECTED]: james at hal-pc.org wrote: the entire 26 character string from site A, but [1] how do i crop it to 10 characters. [1] still at a loss on this one, but i can get to it later, unless you've got any ideas. strings are slicable: s='a string of characters' s[:10] 'a string o' s[-10:] 'characters' As far as your other problem, it might make sense(I don't know...) to just generate the post request for saving the new password yourself and never bother with parsing/filling the form. max -- http://mail.python.org/mailman/listinfo/python-list
Re: web scrapping - POST and auto-login
james at hal-pc.org wrote in news:[EMAIL PROTECTED]: Max Erickson wrote: the entire 26 character string from site A, but [1] how do i crop it to 10 characters. strings are slicable: The only reason i've gotten this far is a basic understanding of syntax and programming in general :) care to enlighten me a little on how to do that? I did. If you have some text in VARIABLE, and do something like: substring=VARIABLE[:10], substring will be the first 10 characters of VARIABLE. -- http://mail.python.org/mailman/listinfo/python-list
Re: nested tuples
Luis P. Mendes [EMAIL PROTECTED] wrote in suppose I'm reading a csv file and want to create a tuple of all those rows and values, like ((row1value1, row1value2, row1value3),(row2value1, row2value2, row2value3),..., (rowNvalue1, rowNvalue2, rowNvalue3)) I haven't found the way to do it just using tuples. How can I do it? Nevertheless, I can solve it like this: a=[] for row in reader: ~ elem = (row[0],row[1],row[2]) ~ a.append(elem) which will result in a list of tuples: [(row1value1, row1value2, row1value3),(row2value1, row2value2, row2value3),..., (rowNvalue1, rowNvalue2, rowNvalue3)] tuple() will consume a list. tuple([1,2,3]) (1, 2, 3) tuple([(1,2),(3,4),(5,6)]) ((1, 2), (3, 4), (5, 6)) max -- http://mail.python.org/mailman/listinfo/python-list
Re: is dict.copy() a deep copy or a shallow copy
Alex [EMAIL PROTECTED] wrote in
news:[EMAIL PROTECTED]:
D={'Python': 'good', 'Basic': 'simple'}
E=D.copy()
E
{'Python': 'good', 'Basic': 'simple'}
D['Basic']='oh my'
D
{'Python': 'good', 'Basic': 'oh my'}
E
{'Python': 'good', 'Basic': 'simple'}
Hmm, this looks like a deep copy to me?? I also tried
It is shallow, but strings are immutable so the difference is fairly
moot.
D={'Python': 'good', 'Basic': 'simple'}
E=D
E
{'Python': 'good', 'Basic': 'simple'}
E['Basic']='oh my'
E
{'Python': 'good', 'Basic': 'oh my'}
D
{'Python': 'good', 'Basic': 'oh my'}
Here, E and D are different names for the same object. There is no
copy.
which looks like a shallow copy to me?? So my hypothesis is that
E=D is a shallow copy while E=D.copy() is a deep copy.
So is the documentation wrong when they claim that D.copy()
returns a shallow copy of D, or did I misunderstand the
difference between a deep and shallow copy?
Sort of, some examples:
Here d1 and d2 are copies. They can be independently changed to
refer to different objects:
d1={'a':1,'b':2}
d2=d1.copy()
d1['a']=3
d2['b']=4
d1
{'a': 3, 'b': 2}
d2
{'a': 1, 'b': 4}
Again, d3 and d4 are copies, but instead of changing the objects
they refer to, we change the contents of the objects they refer to:
d3={'c':[3],'d':[4]}
d4=d3.copy()
d3['c'][0]=5
d4['d'][0]=6
d3
{'c': [5], 'd': [6]}
d4
{'c': [5], 'd': [6]}
Both cases are shallow copies. In a deep copy, altering the contents
of d3['c'] would have no impact on the contents of d4['c'].
max
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Re: Dynamic image creation for the web...
Tompa [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Hi, I would like to create images on the fly as a response to an http request. I can do this with PIL like this (file create_gif.py): from PIL import Image, ImageDraw check out sparklines: http://bitworking.org/projects/sparklines/ It is a script very similar to what you want to do. The difference between your script and sparklines is mostly that it sends: print Content-type: image/png instead of: print 'Content-type: text/html' max -- http://mail.python.org/mailman/listinfo/python-list
Re: Excel Character object through COM
Krisz [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: A.book.Worksheets(1).Range(a1).Characters(1,1) Traceback (most recent call last): File interactive input, line 1, in ? AttributeError: Characters instance has no __call__ method So my question is that am I doing something wrong or there is a different way to modify the color of a charater through COM. try GetCharacters(1,1) max -- http://mail.python.org/mailman/listinfo/python-list
