ANN: HarvestMan 1.4.5 a2
I am glad to announce that the second alpha release of HarvestMan 1.4.5 version is available for download. The first alpha of version 1.4.5 was released on May 27 2005. HarvestMan [http://harvestman.freezope.org] is a multithreaded web crawler program written entirely in Python. It has many features which allows you to highly customize your www crawling/offline downloading. HarvestMan features as much as 60+ configuration options. Options are configured using a custom XML configuration file. Here are some changes for this release. o Use of collections.deque data structure in critical places. This improves the performance of the program when run with Python 2.4 . o Improved HTTP redirect handler to take care of redirect handling that requires cookies. o A number of bug fixes to reduce invalid url (HTTP 404) errors. o Code cleanup to rewrite exception handlers. o Obsolte modules removed. Complete changelog at http://harvestman.freezope.org /files/Changelog.txt . WWW: http://harvestman.freezope.org . -Anand -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
SCF 1.2b1 released
I am very please to announce the release of SCF 1.2b1 a Smart Card development system designed in Python: Two major features are being introduced: 1) Support for BasicCard DES/3/DES/AES secure messaging (Beta release 1) . 2) COM Support: access the power of SCF from Visual Basic or your favorite Windows® language! SCF COM extension is provided as source code so extensions can be applied by the programers. SCF is available on www.snakecard.com for download and free testing. You may also browse the reference guide online. Best regards, Philippe Martin -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
PyGTK or wxPython (not a flame war) on Windows
GUI's etc: PyGtk on Windows (...) So if someone develops mainly for X and just wants to make sure that it is not impossible to run on Windows, you can use PyGTK. (...), July 2nd, 1999 pyGTK on Windows (...) can i use pyGTK under Windows??? It's probably doable (...) but not worthy in my oppinion (...). A much better choice is wxPython (...) (...)even if it is made to work under windows, pygtk would not have a windows look and feel. wxPython is probably your best bet (...) pygtk vs. wxPython 4. (...) If you want cross-platform capabilities (...) then go wxWindows. May 17 2002 7. (...) The pygtk (and gtk port in general) does not yet support threading on windows. (...) GTK 2.0 is supposed to fix it but support isn't available *yet*. (...) May 17 2002 PyGTK vs. wxPython 7. (...) wxPython would indeed be a better choice if your applications are only to run on a certain infamous legacy operating system from the Pacific Northwest. The PyGTK is a better choice if you are writing for Linux and want your application to also be able to run on windows. (...) Apr 25 11. (...) I'm using wxPython because GTK for windows wasn't ready three years ago when I initially had to write my first Windows application. If I evaluated both of them again today, I might choose GTK, and I might not. Apr 27 In the nearest future I will have to decide what to use: PyGTK or wxPython. I like those both APIs. wxPython has more widgets, but PyGTK seems to be faster. I can use them both for free (it's very important). My only concern is that although I'm doing development on Linux, I'd like to make my application runnable on Windows as well (Py2Exe). I'd like to choose PyGTK (because of its rich documentation), but I'm not sure if PyGTK is stable on Windows... For now I know that wxPython runs well on Windows. For now I haven't experienced any problems with wxPython on Linux (Slackware, Aurox /Polish RH-like distro/). I used wxPython on Linux, but I stopped because of its poor documentation (mainly C++ docs, not Python docs). But recently I noticed this documentation got better (*much* better!). How well does PyGTK run on Windows (98, 2K, XP)? How stable is it? Will I be able to make an executable (using Py2Exe) of an application that uses PyGTK? -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
I really love Jason's 'path' module. Sadly, I've encountered a serious problem with using it. When you try to 'freeze' an application module, and Jason's 'path' module is present in any of the directories that are looked at by freeze's module finder (your app doesn't have to import it), freeze goes into an infinite loop of imports, eventually getting a 'maximum recursion depth' exception. This seems to be related to freeze getting confused between 'os.path' and Jason's 'path'. I encountered this using Jason's latest 'path' module and Python 2.3.2. I was able to solve it for my use by renaming path.py to newpath.py and using 'from newpath import path' in my modules. I've just notified Jason about this. I presume a solution like mine will be used, and look forward to seeing Jason's module in stdlib. -- http://mail.python.org/mailman/listinfo/python-list
Re: PyGTK or wxPython (not a flame war) on Windows
TPJ enlightened us with: I'd like to choose PyGTK (because of its rich documentation), but I'm not sure if PyGTK is stable on Windows... For now I know that wxPython runs well on Windows. Don't forget that wxPython looks like Mac on a Mac. That's important too :) Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython Fedora Core 4
linuxfreak [EMAIL PROTECTED] wrote: Has anyone installed wxPython on Fedora Core 4. Apparently it need the libstdc++.so.5 file while Fedora installs the newer libstdc++.so.6 file. I tried installing the libstdc rpm from fedora core 3 You can install compat-libstdc++-33 (part of FC4), which has libstdc++.so.5. However, since your wxPython package wasn't built for FC4, you may run into other problems. Regards, Christophe -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
on 22.07.2005 00:21 Michael Hoffman said the following: Reinhold Birkenfeld wrote: John Roth wrote: Why did Guido want a PEP? He said, Whoa! Do we really need a completely different mechanism for doing the same stuff we can already do? The path module seems mostly useful for folks coming from Java who are used to the Java Path class. What is this Java Path class? I have been STFWing and have found nothing on it in the. Indeed if you search for Java Path class (with quotes) almost half of the pages are this message from Guido. ;) Any Java hackers here want to tell us of the wonders of the Java Path class? no such thing exists. there is only the `File` class that incorporates a little bit of the `path` functionality and some of the python built-in `file` functionality. my little self would actually propose to make *path* a built-in type as an intermediate between file and basestring/str/unicode (the latter is probably needed). *ducks* -- http://mail.python.org/mailman/listinfo/python-list
Re: Detecting computers on network
linuxfreak enlightened us with: How about sending an ICMP echo packet to your broadcast address and checking which hosts send a reply Won't work on all boxes. Windows boxes ignore broadcast pings, for example. I'd go for a call to nmap -sP instead, and filter it's output. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython Fedora Core 4
linuxfreak enlightened us with: Has anyone installed wxPython on Fedora Core 4. Apparently it need the libstdc++.so.5 file while Fedora installs the newer libstdc++.so.6 [...] Fedora does not allow multiple versions of the same file. Try Ubuntu Linux, which does allow having libstdc++.so.5 and .6 installed, on the same system, using the package manager. Fedora _does_ allow multiple versions of that library, but apparently not via it's package manager. Nobody is stopping you from getting the file and putting it on your system. You could also recompile the wxPython RPMs, so they link to your version of the library. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: Centering text in a wx.ListBox w/ wxPython
On 26 Jun 2005 22:34:31 -0700, fo [EMAIL PROTECTED] wrote: How do I center each item in the ListBox widget? Hm, I don't think, this is possilble. Also, is it possible to change the color of the selected item? right now it uses the OSes color. I would like it to be consistant on every machine. for example: listbox.SetForegroundColour(wx.BLUE) -- Franz Steinhaeusler -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with regexp please
Christopher Subich wrote:
Scott David Daniels wrote:
Thanks to you both. Wow! what a quick response!
string.rsplit('.',1)[0]
Clever Python! ;-)
Sorry, I mainly code in C so I'm not very Pythonic in my thinking.
Thanks again...
Felix
--
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Re: Returning histogram-like data for items in a list
Ric Deez [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I have a list: L1 = [1,1,1,2,2,3] How can I easily turn this into a list of tuples where the first element is the list element and the second is the number of times it occurs in the list (I think that this is referred to as a histogram): For ease of reading (but not efficiency) I like: hist = [(x,L1.count(x)) for x in set(L1)] See http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/277600 Alan Isaac -- http://mail.python.org/mailman/listinfo/python-list
Re: Software needed
niXin [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Can anyone direct me to where I can find free software to do the following: Document Management Software --- 1. Written in PHP or Python 2. scanning feature - where I can scan a document http://furius.ca/nabu/ ? -- http://mail.python.org/mailman/listinfo/python-list
wxPython Fedora Core 4
Hi guys, Has anyone installed wxPython on Fedora Core 4. Apparently it need the libstdc++.so.5 file while Fedora installs the newer libstdc++.so.6 file. I tried installing the libstdc rpm from fedora core 3 which would have installed the required file but Fedora does not allow multiple versions of the same file . Man this is frustrating. Help desparately required.. Thanks -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Michael Hoffman wrote:
Having path descend from str/unicode is extremely useful since I can
then pass a path object to any function someone else wrote without
having to worry about whether they were checking for basestring. I think
there is a widely used pattern of accepting either a basestring[1] or a
file-like object as a function argument, and using isinstance() to
figure out which it is.
Reinhold Birkenfeld wrote:
Where do you see that pattern? IIRC it's not in the stdlib.
Here's the first place that comes to mind for me
xml.sax.saxutils
def prepare_input_source(source, base = ):
This function takes an InputSource and an optional base URL and
returns a fully resolved InputSource object ready for reading.
if type(source) in _StringTypes:
source = xmlreader.InputSource(source)
elif hasattr(source, read):
f = source
source = xmlreader.InputSource()
source.setByteStream(f)
if hasattr(f, name):
source.setSystemId(f.name)
and xml.dom.pulldom
def parse(stream_or_string, parser=None, bufsize=None):
if bufsize is None:
bufsize = default_bufsize
if type(stream_or_string) in _StringTypes:
stream = open(stream_or_string)
else:
stream = stream_or_string
if not parser:
parser = xml.sax.make_parser()
return DOMEventStream(stream, parser, bufsize)
Using the power of grep
aifc.py
def __init__(self, f):
if type(f) == type(''):
f = __builtin__.open(f, 'rb')
# else, assume it is an open file object already
self.initfp(f)
binhex.py
class HexBin:
def __init__(self, ifp):
if type(ifp) == type(''):
ifp = open(ifp)
imghdr.py
if type(file) == type(''):
f = open(file, 'rb')
h = f.read(32)
else:
location = file.tell()
h = file.read(32)
file.seek(location)
f = None
mimify.py
if type(infile) == type(''):
ifile = open(infile)
if type(outfile) == type('') and infile == outfile:
import os
d, f = os.path.split(infile)
os.rename(infile, os.path.join(d, ',' + f))
else:
ifile = infile
wave.py
def __init__(self, f):
self._i_opened_the_file = None
if type(f) == type(''):
f = __builtin__.open(f, 'rb')
self._i_opened_the_file = f
# else, assume it is an open file object already
self.initfp(f)
compiler/transformer.py:
if type(file) == type(''):
file = open(file)
return self.parsesuite(file.read())
plat-mac/applesingle.py
if type(input) == type(''):
input = open(input, 'rb')
# Should we also test for FSSpecs or FSRefs?
header = input.read(AS_HEADER_LENGTH)
site-packages/ZODB/ExportImport.py
if file is None: file=TemporaryFile()
elif type(file) is StringType: file=open(file,'w+b')
site-packages/numarray/ndarray.py
if type(file) == type():
name = 1
file = open(file, 'wb')
site-packages/kiva/imaging/GdImageFile.py
if type(fp) == type():
import __builtin__
filename = fp
fp = __builtin__.open(fp, rb)
else:
filename =
site-packages/reportlab/graphics/renderPM.py
if type(image.path) is type(''):
im = _getImage().open(image.path).convert('RGB')
else:
im = image.path.convert('RGB')
site-packages/twisted/protocols/irc.py
def __init__(self, file):
if type(file) is types.StringType:
self.file = open(file, 'r')
(hmm, that last one looks buggy. It should
have a else: self.file = file afterwards.)
Used in the std. lib and used by many different
people. (I excluded the Biopython libraries
in this list, btw, because I may have influenced
the use of this sort of type check.)
Andrew
[EMAIL PROTECTED]
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Re: Help with regexp please
Scott David Daniels wrote:
Felix Collins wrote:
I have an outline number system like
1
1.2
1.2.3
I want to parse an outline number and return the parent.
Seems to me regex is not the way to go:
def parent(string):
return string[: string.rindex('.')]
Absolutely, regex is the wrong solution for this problem. I'd suggest
using rsplit, though, since that will Do The Right Thing when a
top-level outline number is passed:
def parent(string):
return string.rsplit('.',1)[0]
Your solution will throw an exception, which may or may not be the right
behaviour.
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Re: Detecting computers on network
How about sending an ICMP echo packet to your broadcast address and checking which hosts send a reply -- http://mail.python.org/mailman/listinfo/python-list
Re: How to limit the uploading file size in python?
praba kar [EMAIL PROTECTED] wrote: In Php we can limit the uploading file size by php.ini configuration file. But In python what way we can limit the file uploading size. kindly let me know. Unlike PHP, Python is a general-purpose language that is not targetted specifically at the web, so it has no native concept of uploading. You can do this by using the LimitRequestBody directive in your Apache configuration or .htaccess file. -- - Tim Roberts, [EMAIL PROTECTED] Providenza Boekelheide, Inc. -- http://mail.python.org/mailman/listinfo/python-list
Re: Stupid question: Making scripts python-scripts
Jan Danielsson wrote:
Hello all,
How do I make a python script actually a _python_ in unix:ish
environments?
I know about adding:
#!/bin/sh
..as the first row in a shell script, but when I installed python on
a NetBSD system, I didn't get a python executable; only a python2.4
executable.
Adding #!/usr/pkg/bin/python2.4 as the first row in the script
would probably work, but that would be too specific for the system I'm
using, imho.
What about:
ln /usr/pkg/bin/python2.4 /usr/bin/python
then
#!/usr/bin/python
in your script, and you should be done (dont forget to chmod +x your
script of course)
Or I'm I missing something specific to xxxBSD ?
I saw someone using #!/usr/bin/env python, but that failed on the
system I'm using,
How do you execute the python interpreter ? If you need to type
python2.4 (not just python), then obviously 'usr/bin/env python'
syntax shouldn't work either.
My 2 cents
--
bruno desthuilliers
python -c print '@'.join(['.'.join([w[::-1] for w in p.split('.')]) for
p in '[EMAIL PROTECTED]'.split('@')])
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Re: Difference between and '
Steven D'Aprano wrote:
Michael Hoffman wrote:
John Machin wrote:
[EMAIL PROTECTED] wrote:
Can someone tell me the difference between single quote and double
quote?
ord(') - ord('')
5
Very zen.
But unfortunately incorrect, since the original poster didn't ask for
the difference between the ordinal values of the single quote and double
quote characters, but for the difference between the characters themselves.
It reminded me of a zen koan, because although it was a joke at the
expense of original poster, the true answer was still contained within
when the answerer had to use different kinds of quoting to quote single
and double quotes.
--
Michael Hoffman
--
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Re: Web-Forms
Mike Meyer wrote: Mathias Waack [EMAIL PROTECTED] writes: Hi, I need to access some information from a web site which are only accessible through a form. Thus for each bucket of data you have to fill out the form, submit it and wait for an answer. Very easy - if you don't have to check some hundred times. Of course this site requires cookies, it is not directly accessible by URL and so on. All that nice stuff used to make a web site more professional;) But now the question: how can this be solved by using Python? urllib2 (in the standard library) for reading the data from the website. BeautifulSoup URL: http://www.crummy.com/software/BeautifulSoup/ for extracting data from the pages. Adding ClientForm for automatically handling the forms and ClientCookie/cookielib for automatic cookie handling. Best Regards, Fuzzy http://www.voidspace.org.uk/python mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Stefan Rank wrote: on 22.07.2005 00:21 Michael Hoffman said the following: Any Java hackers here want to tell us of the wonders of the Java Path class? no such thing exists. there is only the `File` class that incorporates a little bit of the `path` functionality and some of the python built-in `file` functionality. Ah, here it is: http://java.sun.com/j2se/1.5.0/docs/api/java/io/File.html -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPythin installation woes
linuxfreak wrote: Hi all, Was working with python 2.3 in a fedora core 3 machine. I upgraded it to Fedora Core 4 with a clean install. So now I have python 2.4 installed. But when I try to install wxPython for python 2.4 using an rpm file i downloaded from the wxpython web site i get dependencies errors. Turns out that libstdc++.so.5 is needed but I checked and i see that libstdc++.so.6 is installed on my system. Help needed guys and needed pronto. Thanks a ton once again :) I have fedora core 4 and a yum list wx* produces this:- wxGTK.i386 2.4.2-12 extras wxGTK-common.i3862.4.2-12 extras wxGTK-common-devel.i386 2.4.2-12 extras wxGTK-devel.i386 2.4.2-12 extras wxGTK-gl.i3862.4.2-12 extras wxGTK-stc.i386 2.4.2-12 extras wxGTK-xrc.i386 2.4.2-12 extras wxGTK2.i386 2.4.2-12 extras wxGTK2-devel.i3862.4.2-12 extras wxGTK2-gl.i386 2.4.2-12 extras wxGTK2-stc.i386 2.4.2-12 extras wxGTK2-xrc.i386 2.4.2-12 extras wxPythonGTK2.i3862.4.2.4-7 extras So I assume a yum install wxPythonGTK2 will get you wxPython installed. *I havn't done that since I only use Tkinter* Martin -- http://mail.python.org/mailman/listinfo/python-list
Re: Lots of pdf files
[Duncan] a mere $29.90, except it is GPL'd so I'm not sure what the money is for Tech support [...] free forever for registered users. But I've often wondered whether you could charge for mass-market GPL software simply because your ordinary punter doesn't know what the GPL is, and doesn't mind paying a small amount of money for decent software. Whether it's ethical, given that presumably the thing is GPL because it inherits GPL code from other developers, I don't know. Certainly the GPL itself has no objection to charging for binaries provided you ship the source as well. -- Richie Hindle [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: is this pythonic?
Terry Yes, I must agree with you that it is something I should know. I do try to keep with things but there are always some things that slip through the cracks, like enumerate, in this case. That is why I am extremely grateful the for the activity, generosity and pure knowledge on this newsgroup to fill in the blanks for me. It is guys like you who are willing to take the time to give responses that make it what it is. In another newsgroup, I could have been flamed for letting Simon know he helped more than just the OP with his post :) Thanks Caleb On Wed, 20 Jul 2005 23:41:36 +0200, Terry Reedy [EMAIL PROTECTED] wrote: Wow, I didn't know about enumerate. It is listed and explained in Lib Ref Manual, Chapter 2, on builtin functions and types and their methods. Everyone should read at least that much of the Lib manual. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference between and '
[EMAIL PROTECTED] wrote:
Hi,
Can someone tell me the difference between single quote and double
quote?
ord(') - ord('')
5
or ask a meaningful question ...
--
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Re: PEP on path module for standard library
Reinhold Birkenfeld wrote: FYI: I modified the path module a bit so that it fits many of the suggestions from python-dev, and put the result in the Python CVS tree under nondist/sandbox/path. Most prominent change is that it doesn't inherit from str/unicode anymore. I found this distinction important, because as a str subclass the Path object has many methods that don't make sense for it. Having path descend from str/unicode is extremely useful since I can then pass a path object to any function someone else wrote without having to worry about whether they were checking for basestring. I think there is a widely used pattern of accepting either a basestring[1] or a file-like object as a function argument, and using isinstance() to figure out which it is. What do you gain from removing these methods? A smaller dir()? [1] Probably str in actuality. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Michael Hoffman wrote: Reinhold Birkenfeld wrote: FYI: I modified the path module a bit so that it fits many of the suggestions from python-dev, and put the result in the Python CVS tree under nondist/sandbox/path. Most prominent change is that it doesn't inherit from str/unicode anymore. I found this distinction important, because as a str subclass the Path object has many methods that don't make sense for it. Having path descend from str/unicode is extremely useful since I can then pass a path object to any function someone else wrote without having to worry about whether they were checking for basestring. I think there is a widely used pattern of accepting either a basestring[1] or a file-like object as a function argument, and using isinstance() to figure out which it is. Where do you see that pattern? IIRC it's not in the stdlib. What do you gain from removing these methods? A smaller dir()? It made sense to me at the time I changed this, although at the moment I can't exactly recall the reasons. Probably as Terry said: a path is both a list and a string. Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Michael Hoffman wrote: [EMAIL PROTECTED] wrote: I really love Jason's 'path' module. Sadly, I've encountered a serious problem with using it. When you try to 'freeze' an application module, and Jason's 'path' module is present in any of the directories that are looked at by freeze's module finder (your app doesn't have to import it), freeze goes into an infinite loop of imports, eventually getting a 'maximum recursion depth' exception. This seems to be related to freeze getting confused between 'os.path' and Jason's 'path'. I encountered this using Jason's latest 'path' module and Python 2.3.2. I was able to solve it for my use by renaming path.py to newpath.py and using 'from newpath import path' in my modules. I've just notified Jason about this. I presume a solution like mine will be used, and look forward to seeing Jason's module in stdlib. This sounds like a bug in freeze rather than something that should be worked around in the standard library. Although there have already been people opposed to naming it path because the duplication with os.path might confuse humans. As the most likely placement will be a class named Path inside the os.path module, that bug with freeze won't apply to the stdlib version of Path. Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
John Roth wrote: Michael Hoffman [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] Many of you are familiar with Jason Orendorff's path module http://www.jorendorff.com/articles/python/path/, which is frequently recommended here on c.l.p. I submitted an RFE to add it to the Python standard library, and Reinhold Birkenfeld started a discussion on it in python-dev http://mail.python.org/pipermail/python-dev/2005-June/054438.html. The upshot of the discussion was that many python-dev'ers wanted path added to the stdlib, but Guido was not convinced and said it must have a PEP. Why did Guido want a PEP? Is it because he likes the idea but feels the feature set needs to be examined a bit more by the wider community, or is it some other reason? He said, Whoa! Do we really need a completely different mechanism for doing the same stuff we can already do? The path module seems mostly useful for folks coming from Java who are used to the Java Path class. With the massive duplication of functionality we should also consider what to recommend for the future: will the old os.path module be deprecated, or are we going to maintain both alternatives forever? (And what about all the duplication with the os module itself, like the cwd() constructor?) Remember TOOWTDI. Reinhold -- http://mail.python.org/mailman/listinfo/python-list
dictionary that discards old items
Hi folks,
I need a collection class that behaves like a dictionary but when it
reaches 'n' items it discards the oldest item so that the length never
goes above 'n'. (Its for caching search results)
I have a vague memory of a module that does this, but I cant remember
where I read about it. Can anyone enlighten me?
Regards,
Will McGugan
--
http://www.willmcgugan.com
.join({'*':'@','^':'.'}.get(c,0) or chr(97+(ord(c)-84)%26) for c in
jvyy*jvyyzpthtna^pbz)
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Re: dictionary that discards old items
Will McGugan wrote: I need a collection class that behaves like a dictionary but when it reaches 'n' items it discards the oldest item so that the length never goes above 'n'. (Its for caching search results) I have a vague memory of a module that does this, but I cant remember where I read about it. Can anyone enlighten me? You want a Least Recently Used, or LRU, cache. Here's one: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252524 Google for LRU python to find others. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: Couple quick questions from a Python Noob
Thanks you to. Oh, and it is .pyw, you're right. -- http://mail.python.org/mailman/listinfo/python-list
problem with string
hi :) I need some help for this script I have cursor = conn.cursor() cursor.execute(select * from playlist limit 5) result = cursor.fetchall() # iterate through resultset playlist_txt = '' for record in result: mp3id = record[0] mp3_title = record[1] mp3_artist = record[2] playlist_txt += mp3id + mp3_title + mp3_artist #print mp3id , - , mp3_title , ' - ', mp3_artist , br / cursor.close() conn.close() -- #and want to print this out of for record in result: print playlist_txt #but there is an error in playlist_txt += mp3id + mp3_title + mp3_artist 10x in advance :) -- http://mail.python.org/mailman/listinfo/python-list
Re: goto
Rocco Moretti [EMAIL PROTECTED] writes: My favorite infinte loop with while is: i = 0 while i 20: do_process(i) Note the prominent *lack* of any change to i here? Oh, for: from i = 0 invariant 0 = i = 20 variant 21 - i until i 19 loop do_process(i) which throws an exception at the beginning of the second loop. What language is that from? Eiffel. I take it the exception is from the 21-i not changing as it goes around the loop, right? (But why can't variant i work just as well?) Because that's the way variant is defined. You actually want the variant to move in a specific direction, so that you don't wind up incrementing it when you should be decrementing it. Eiffel chose down, so you you need -i at the very least. It also insists that the invariant be positive. I'm not sure why; it makes the variant more complicated, resulting in exceptions from bugs in the variant as well as bugs in the loop. mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: Generating images with text in them
[EMAIL PROTECTED] (phil hunt) writes: On Thu, 21 Jul 2005 02:44:03 -0500, Terry Hancock [EMAIL PROTECTED] wrote: While bitmap font files are not copyrightable, there are license issues with most of the nicer fonts you are probably talking about. Oh? I can understand them being copyrighted; but if they are not copywritable, what licnese issues are there? In any case, there presumably are not license issues with the fonts that come with a standard GNU/Linux distribution such as SuSE 9.1, which is what I am using. I haven't looked in a while; the situation may have changed. The font files per se are copyrightable, and you may have licensing issues if you want to give those away. The *output* from the font files - the bitmaps that Terry mentions - are not copyrightable. You are free to do whatever you want with the images you get from them, including scan them all in and create a bitmapped font file, or scan them in in multipe sizes and cons up a competing font. mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: Returning histogram-like data for items in a list
Ric Deez wrote: Hi there, I have a list: L1 = [1,1,1,2,2,3] How can I easily turn this into a list of tuples where the first element is the list element and the second is the number of times it occurs in the list (I think that this is referred to as a histogram): i.e.: L2 = [(1,3),(2,2),(3,1)] import itertools L1 = [1,1,1,2,2,3] L2 = [(key, len(list(group))) for key, group in itertools.groupby(L1)] L2 [(1, 3), (2, 2), (3, 1)] -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with string
Tzanko Tzanev wrote: hi :) I need some help for this script I have cursor = conn.cursor() cursor.execute(select * from playlist limit 5) result = cursor.fetchall() # iterate through resultset playlist_txt = '' for record in result: mp3id = record[0] mp3_title = record[1] mp3_artist = record[2] playlist_txt += mp3id + mp3_title + mp3_artist #print mp3id , - , mp3_title , ' - ', mp3_artist , br / cursor.close() conn.close() -- #and want to print this out of for record in result: print playlist_txt #but there is an error in playlist_txt += mp3id + mp3_title + mp3_artist Have you considered doing print record at the appropriate place? Care to tell us what the error message is, or is it a state secret that can be obtained only by hanging you by your extremities and inserting laxatives into your ears with firehoses? -- http://mail.python.org/mailman/listinfo/python-list
Re: Returning histogram-like data for items in a list
Michael Hoffman [EMAIL PROTECTED] wrote:
Ric Deez wrote:
Hi there,
I have a list:
L1 = [1,1,1,2,2,3]
How can I easily turn this into a list of tuples where the first element
is the list element and the second is the number of times it occurs in
the list (I think that this is referred to as a histogram):
i.e.:
L2 = [(1,3),(2,2),(3,1)]
import itertools
L1 = [1,1,1,2,2,3]
L2 = [(key, len(list(group))) for key, group in itertools.groupby(L1)]
L2
[(1, 3), (2, 2), (3, 1)]
--
Michael Hoffman
This is correct if the original list items are grouped together; to be on the
safe side, sort it
first:
L2 = [(key, len(list(group))) for key, group in itertools.groupby(sorted(L1))]
Or if you care about performance rather than number of lines, use this:
def hist(seq):
h = {}
for i in seq:
try: h[i] += 1
except KeyError: h[i] = 1
return h.items()
George
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Re: Stupid question: Making scripts python-scripts
Bill Mill [EMAIL PROTECTED] writes: On 7/21/05, Jan Danielsson [EMAIL PROTECTED] wrote: Hello all, How do I make a python script actually a _python_ in unix:ish environments? I know about adding: #!/bin/sh ..as the first row in a shell script, but when I installed python on a NetBSD system, I didn't get a python executable; only a python2.4 executable. Adding #!/usr/pkg/bin/python2.4 as the first row in the script would probably work, but that would be too specific for the system I'm using, imho. I saw someone using #!/usr/bin/env python, but that failed on the system I'm using, so I assume that's something specific too (or is the installation broken?). The env program [1], which usually exists at least on a linux system, executes the program given as its argument. Thus, /usr/bin/env python tries to executes python, which bash will then use to run the python script. As long as env exists, and python is somewhere in the PATH, this is a fairly portable way to run python scripts. env doesn't invoke the shell, it uses execvp, which duplicates the actions of the shell in searching for an executable. Further, he's on NetBSD - he may not have bash installed. My FreeBSD box certainly doesn't. Does BSD really not come with the env program? I bet there's an equivalent you could symlink to it. Unfortunately, I've never BSDed, so I can't help you find it. To get a workable subset of the normal env functionality, you could try (assuming you use bash): NetBSD comes with an env. His env is failing because he doesn't have a python command installed. This appears to be wart(?) in the NetBSD packaging system. To allow multiple versions of FreeBSD to coexist, it doesn't install a python command at all, but instead leaves the versioned one around. Two solutions: have your scripts use #!/usr/pkg/bin/python2.4. That way, when you install a new python, they will keep using the old one. That will insure they won't break when you upgrade. However, such breakage is pretty rare in practice. I'd pick a favorite bin directory and symlink from python there to /usr/pkg/bin/python2.4, then use #!/usr/bin/env python in your scripts. While I'm on the topic, I think I'll share my favorite cool trick. #!/usr/opt/bin/mypythonscript Doesn't work because Unix won't let you use an interpreted script as the interpreter (is this true for all variants?). However, #!/usr/bin/env mypythonscript works like a charm. mike -- Mike Meyer [EMAIL PROTECTED] http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Reinhold Birkenfeld: And it is much more Pythonic in my eyes. Though that word may be inaccurate when it comes from someone else that Guido, I feel that endless chains of '[os.path.join(os.path.join(z, a), x) for x in os.path.listdir(os.path.join(z, a) if os.path.isfile(os.path.join( are not qualified as being Pythonic. I like Path but the above is trying too hard to be poor code. os.path.join takes more than 2 arguments, so that should be [os.path.join(z, a, x) for x in os.path.listdir(os.path.join(z, a) if os.path.isfile(os.path.join( Neil -- http://mail.python.org/mailman/listinfo/python-list
Returning histogram-like data for items in a list
Hi there,
I have a list:
L1 = [1,1,1,2,2,3]
How can I easily turn this into a list of tuples where the first element
is the list element and the second is the number of times it occurs in
the list (I think that this is referred to as a histogram):
i.e.:
L2 = [(1,3),(2,2),(3,1)]
I was doing something like:
myDict = {}
for i in L1:
myDict.setdefault(i,[]).append(i)
then doing this:
L2 = []
for k, v in myDict.iteritems():
L2.append((k, len(v)))
This works but I sort of feel like there ought to be an easier way,
rather than to have to store the list elements, when all I want is a
count of them. Would anyone care to comment?
I also tried this trick, where locals()['_[1]'] refers to the list
comprehension itself as it gets built, but it gave me unexpected results:
L2 = [(i, len(i)) for i in L2 if not i in locals()['_[1]']]
L2
[((1, 3), 2), ((2, 2), 2), ((3, 1), 2)]
i.e. I don't understand why each tuple is being counted as well.
Regards,
Ric
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Re: PEP on path module for standard library
John Roth [EMAIL PROTECTED] wrote: Reinhold Birkenfeld [EMAIL PROTECTED] wrote He said, Whoa! Do we really need a completely different mechanism for doing the same stuff we can already do? The path module seems mostly useful for folks coming from Java who are used to the Java Path class. With the massive duplication of functionality we should also consider what to recommend for the future: will the old os.path module be deprecated, or are we going to maintain both alternatives forever? (And what about all the duplication with the os module itself, like the cwd() constructor?) Remember TOOWTDI. Read literally, this says (at least to me) I don't want to fix it because I don't think it's broke. Or rather I prefer a single existing mediocre solution than two solutions (even if the second was better). George -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with string
Tzanko Tzanev a écrit : hi :) I need some help for this script I have please take care of indentation when posting code. cursor = conn.cursor() cursor.execute(select * from playlist limit 5) result = cursor.fetchall() # iterate through resultset playlist_txt = '' for record in result: mp3id = record[0] mp3_title = record[1] mp3_artist = record[2] playlist_txt += mp3id + mp3_title + mp3_artist Err... what about: print br /\n.join([ - .join(record[:3]) for record in result]) or : for record in result: print %s - %s - %s br / % tuple(record[:3]) Anyway, avoid string concatenation in loop, prefer appending to a list and then str.join(): playlist = [] for record in result: playlist.append(record[0] + record[1] + record[2]) print \n.join(playlist) Note that this is a very strange and complicated way to write: print \n.join([''.join(rec) for rec[:3] in result]) And, finally, if you just want to check what's in your resultset: print result #print mp3id , - , mp3_title , ' - ', mp3_artist , br / cursor.close() conn.close() Since you're doing a fetchall(), you could (and should if you don't use em again) free your resources as soon as you've retrieved the resultset: cursor = conn.cursor() cursor.execute(select * from playlist limit 5) result = cursor.fetchall() cursor.close() conn.close() # now use the resultset... -- #and want to print this out of for record in result: print playlist_txt #but there is an error in playlist_txt += mp3id + mp3_title + mp3_artist Are we supposed to guess what the error is ? Sorry, I'm not psychic enough. Please post the full traceback. (wild guess: mp3id is an integer ?) -- http://mail.python.org/mailman/listinfo/python-list
Re: Returning histogram-like data for items in a list
Adding to George's reply, if you want slightly more performance, you
can avoid the exception with something like
def hist(seq):
h = {}
for i in seq:
h[i] = h.get(i,0)+1
return h.items()
Jeethu Rao
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Re: Difference between and '
[EMAIL PROTECTED] wrote: Can someone tell me the difference between single quote and double quote? One has double the fun. -- Erik Max Francis [EMAIL PROTECTED] http://www.alcyone.com/max/ San Jose, CA, USA 37 20 N 121 53 W AIM erikmaxfrancis Forgive your enemies, but never forget their names. -- John F. Kennedy -- http://mail.python.org/mailman/listinfo/python-list
Help with regexp please
Hi, I'm not a regexp expert and had a bit of trouble with the following search. I have an outline number system like 1 1.2 1.2.3 1.3 2 3 3.1 etc. I want to parse an outline number and return the parent. So for example... parent(1.2.3.4) returns 1.2.3 The only way I can figure is to do two searches feeding the output of the first into the input of the second. Here is the code fragment... m = re.compile(r'(\d+\.)+').match(1.2.3.4) n = re.compile(r'\d+(\.\d+)+').match(m.string[m.start():m.end()]) parentoutlinenumber = n.string[n.start():n.end()] parentoutlinenumber 1.2.3 How do I get that into one regexp? Thanks for any help... Felix -- http://mail.python.org/mailman/listinfo/python-list
Re: dictionary that discards old items
[Will McGugan] I need a collection class that behaves like a dictionary but when it reaches 'n' items it discards the oldest item so that the length never goes above 'n'. (Its for caching search results) import collections class Cache(dict): def __init__(self, n, *args, **kwds): self.n = n self.queue = collections.deque() dict.__init__(self, *args, **kwds) def __setitem__(self, k, v): self.queue.append(k) dict.__setitem__(self, k, v) if len(self) self.n: oldk = self.queue.popleft() del self[oldk] # . . . # make similar modifications to setdefault, __delitem__, fromkeys # and other mutating methods as needed # Example c = Cache(3) for w in 'the quick brown fox jumped over the lazy dog'.split(): c[w] = w[:1].upper() print repr(c) -- http://mail.python.org/mailman/listinfo/python-list
Re: Help with regexp please
Felix Collins wrote:
Hi,
I'm not a regexp expert and had a bit of trouble with the following search.
I have an outline number system like
1
1.2
1.2.3
I want to parse an outline number and return the parent.
Seems to me regex is not the way to go:
def parent(string):
return string[: string.rindex('.')]
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Re: PEP on path module for standard library
George Sakkis wrote: Read literally, this says (at least to me) I don't want to fix it because I don't think it's broke. Or rather I prefer a single existing mediocre solution than two solutions (even if the second was better). Except that he is open to persuasion, so the PEP has to demonstrate that the duplication is worth the benefit. Personally I think the concept of a specific path type is a good one, but subclassing string just cries out to me as the wrong thing to do. In other words, to me a path represents something in a filesystem, the fact that it has one, or indeed several string representations does not mean that the path itself is simply a more specific type of string. You should need an explicit call to convert a path to a string and that forces you when passing the path to something that requires a string to think whether you wanted the string relative, absolute, UNC, uri etc. It may even be that we need a hierarchy of path classes: URLs need similar but not identical manipulations to file paths, so if we want to address the failings of os.path perhaps we should also look at the failings of urlparse at the same time. -- http://mail.python.org/mailman/listinfo/python-list
Re: problem with string
Tzanko Tzanev wrote: #but there is an error in playlist_txt += mp3id + mp3_title + mp3_artist It'd be a lot easier to help if you'd say what the error was. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Duncan Booth wrote: You should need an explicit call to convert a path to a string and that forces you when passing the path to something that requires a string to think whether you wanted the string relative, absolute, UNC, uri etc. Egad. I'm not sure if that will really make people's lives easier. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Re: RegUnloadkey access denied
I've worked out that I can open and close the key fine if I don't open a subkey. I've tried adding flush and close statements after opening the key and still get access denied when trying to unload. -- http://mail.python.org/mailman/listinfo/python-list
Re: httplib/HTTPS Post Problem
Thanks for the replies, Andreas and Peter. Andreas Kostyrka wrote: snip Just a curious guess: Are you behind a proxy? If so, it's a known and never fixed bug from Python 1.5 times ;) No, I'm not behind a proxy - the server is on the same PC as my client (while I'm testing!). You might also try to use PyCurl. I've quickly read about PyCurl, but it only seems to allow HTTP HEAD, GET, POST and PUT methods - though please correct me if I'm wrong. I'd like to use httpLib in Python as I also need the DELETE method and the possibility of adding some extra headers and extra methods (I'm working on something like this : http://sw.nokia.com/uriqa/URIQA.html that allows MGET, MPUT, MPOST, etc.). I've done some more testing and still can't work out why Python operates differently to other http clients... any ideas? Thanks, Michael. snip -- http://mail.python.org/mailman/listinfo/python-list
Multithreaded class with queues
Hi! I wrote a little class to make multihreading easier. It's based on one of aahz's threading example scripts. What it does: It spawns up number of CollectorThreads and one ProcessThread. The CollectorThreads listen on one queue (inputqueue), read, process the data (with colfunc), put the result onto the outputqueue. The ProcessThread listens on the outputqueue, reads, processes (with prfunc). end. (more details in the attached file) it seems to work with test functions but when I use a network-intensive function (snmp-queries) it just gets slower with maxThreads set to more than 1. Any help? Thanks. see the class attached. ps. Maybe I basically don't understand something... -- --arutz #!/usr/local/bin/python Multithreaded class for the task: multiple collector - one dataprocessor Usage: collector = Collector(data, colfunc, prfunc, maxThreads) collector.run() Internals: Collector spawns up the CollectorThreads and a ProcessThread and puts the data onto the inputQueue. The CollectorThread reads the data from inputQueue and processes it through 'colfunc()'. Then puts the result onto the outputQueue. The ProcessThread only listens on the outputQueue (blocks on it) and feeds the data to `prfunc()`. Thread shutdown: collectorthreads: inputQueue.put(shutdown=True) processthread: outputQueue.put(shutdown=True) import threading import Queue #from operator import truth as _truth #def _xor(a,b): #return _truth(a) ^ _truth(b) class _Token: def __init__(self, data=None, shutdown=None): #if not _xor(data, shutdown): #raise Tsk, tsk, need to set either URL or shutdown (not both) self.data = data self.shutdown = shutdown class _CollectorThread(threading.Thread): Worker thread blocking on inputQueue. The result goes to outputQueue after processed by self.func. def __init__(self, inQueue, outQueue, func): threading.Thread.__init__(self) self.inQ = inQueue self.outQ = outQueue self.func = func def run(self): while True: token = self.inQ.get() if token.shutdown is not None: break else: #collect data from the routers #print token.data result = self.func(token.data) self.outQ.put_nowait(_Token(data=result)) class _ProcessThread(threading.Thread): 'Reader-only' thread processing outputQueue. def __init__(self, outQueue, func): threading.Thread.__init__(self) self.outQ = outQueue self.func = func def run(self): while True: token = self.outQ.get() if token.shutdown is not None: break else: #insert into db or do anything self.func(token.data) class Collector: Spawns up the threadpool (worker and processthreads) and puts tha data onto the inputQueue of the worker threads. Then shuts them down. def __init__(self, data, colfunc, prfunc, maxThreads=5): Parameters: - data: data for collectfunc (type of sequence) - colfunc: function to process inputQueue into outputQueue - prfunc: function to process outputQueue - maxThreads: MAX_THREADS self.data = data self.inputQueue = Queue.Queue() self.outputQueue = Queue.Queue() self.threadPool = [] #Start the worker threads for i in range(maxThreads): collector = _CollectorThread(self.inputQueue, self.outputQueue, colfunc) collector.start() self.threadPool.append(collector) #Start the db thread self.processthread = _ProcessThread(self.outputQueue, prfunc) self.processthread.start() def run(self): Queue the data and shutdown the threads. self._queueData() self._shutdown() def _queueData(self): Put data onto the inputQueue. for d in self.data: self.inputQueue.put_nowait(_Token(data=d)) def _shutdown(self): for i in self.threadPool: self.inputQueue.put(_Token(shutdown=True)) for thread in self.threadPool: thread.join() self.outputQueue.put(_Token(shutdown=True)) self.processthread.join() if __name__ == '__main__': def myprint(s): print s def hashdata(a): return a + ': OK' MAX_THREADS = 5 data = ['1', '2', 'asd', 'qwe'] collect = Collector(data=data, colfunc=hashdata, prfunc=myprint, maxThreads=MAX_THREADS) collect.run() -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
[EMAIL PROTECTED] writes: I really love Jason's 'path' module. Sadly, I've encountered a serious problem with using it. When you try to 'freeze' an application module, and Jason's 'path' module is present in any of the directories that are looked at by freeze's module finder (your app doesn't have to import it), freeze goes into an infinite loop of imports, eventually getting a 'maximum recursion depth' exception. This seems to be related to freeze getting confused between 'os.path' and Jason's 'path'. I encountered this using Jason's latest 'path' module and Python 2.3.2. I was able to solve it for my use by renaming path.py to newpath.py and using 'from newpath import path' in my modules. I've just notified Jason about this. I presume a solution like mine will be used, and look forward to seeing Jason's module in stdlib. That was a bug in modulefinder, which was fixed in Python 2.4 and 2.3.4. See http://www.python.org/sf/876278. Thomas -- http://mail.python.org/mailman/listinfo/python-list
Re: Web-Forms
Use twill:http://www.idyll.org/~t/www-tools/twill.html Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: Detecting computers on network
You could use a sniffer in promiscuous mode. pypcap -- or something like. This will record every packet seen by your network card. Whether is will work depends on whether you are on a true braodcast network. if a box is on and completely inactive you'll never see it, but most boxes do something. Windows boxes positively shout about there presence :-) baically this is pasive nmap, nmap will try to open a tcp or udp connection on every machine. your going to generat a lot of traffic. If you've got access to the boxes enabling ICMP and using that is the proper way. Sandeep Arya wrote: Hello dear I had sent my earlier queries regarding same topic. However just to be more specific this time.. I just wann try to detect that if there are some ip address in a list of some ip address alive or not. How can i do this? Shall i try to connect them and check that my connection is working or not? If working than means alive (connection based) SHalle i send some buffer value (whatever) to socket using sendto(...) and then checking for return value? (Connectionless) Well for me it doesnot matter that i should have connection or connectionless.. I just wannn know who are alive in my LAN? This application will be for my computers in lan. not for maganetwork. LAN will have just some bridges and computers. i need to detect tham all.. however i doesnot matter that all of them replies or not. I just wann know that atleast some of them reply. Rest i will take care of... Sandeep _ NRIs, does your family in India need money urgently? http://creative.mediaturf.net/creatives/icicibank/ICICI_NRI_ERA.htm Open an ICICI Bank NRI savings A/c -- http://mail.python.org/mailman/listinfo/python-list
Get directory from http web site
Hi all :) I was wondering if there's some neat and easy way to get the entire contents of a directory at a specific web url address. I have the following link: http://www.infomedia.it/immagini/riviste/covers/cp and as you can see it's just a list containing all the files (images) that I need. Is it possible to retrieve this list (not the physical files) and have it stored in a variable of type list or something? And, if so, what would be the easiest and most efficient way? Thank you so much in advance. Rock -- http://mail.python.org/mailman/listinfo/python-list
Web frame systems vs. pure Python
I am thinking about a new project and I do not know if I should use Python with HTML code only or use a web frame such as Cherry or a similar ( which one then??) and a template system. Can you please explain what I will get / lose if I use a web frame system? Thanks a lot La. -- http://mail.python.org/mailman/listinfo/python-list
Re: dictionary that discards old items
On 7/21/05, Michael Hoffman [EMAIL PROTECTED] wrote: Will McGugan wrote: I need a collection class that behaves like a dictionary but when it reaches 'n' items it discards the oldest item so that the length never goes above 'n'. (Its for caching search results) I have a vague memory of a module that does this, but I cant remember where I read about it. Can anyone enlighten me? You want a Least Recently Used, or LRU, cache. Here's one: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/252524 http://py.vaults.ca/apyllo.py/514463245.769244789.92554878 -- http://mail.python.org/mailman/listinfo/python-list
Re: RegUnloadkey access denied
solved it! I need to close the key first import ntsecuritycon import win32security import win32api import _winreg import win32con flags = ntsecuritycon.TOKEN_ADJUST_PRIVILEGES | ntsecuritycon.TOKEN_QUERY htoken = win32security.OpenProcessToken(win32api.GetCurrentProcess(), flags) Loadid = win32security.LookupPrivilegeValue(None, 'SeRestorePrivilege') Saveid = win32security.LookupPrivilegeValue(None, 'SeBackupPrivilege') LoadPrivilege = [(Loadid, ntsecuritycon.SE_PRIVILEGE_ENABLED)] SavePrivilege = [(Saveid, ntsecuritycon.SE_PRIVILEGE_ENABLED)] win32security.AdjustTokenPrivileges(htoken, 0, LoadPrivilege) win32security.AdjustTokenPrivileges(htoken, 0, SavePrivilege) key = _winreg.HKEY_USERS hkey = win32api.RegLoadKey(key,'Marc','c:\\ntuser.dat') okey = win32api.RegOpenKeyEx(key,'Marc\\test',0,win32con.KEY_SET_VALUE) win32api.RegSetValueEx(okey,'test',0,_winreg.REG_DWORD,0) win32api.RegCloseKey(okey) win32api.RegUnLoadKey(key,'Marc') -- http://mail.python.org/mailman/listinfo/python-list
find a specified dictionary in a list
I have this list:
[{'i': 'milk', 'oid': 1}, {'i': 'butter', 'oid': 2},{'i':'cake','oid':3}]
All the dictionaries of this list are of the same form, and all the oids
are distinct. If I have an oid and the list, how is the simplest way of
getting the dictionary that holds this oid?
Thanks in advance
--
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så har du alt du trenger for å leve
-Jokke Valentinerne
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Re: PEP on path module for standard library
When you try to 'freeze' an application module, and Jason's 'path' module is present in any of the directories that are looked at by freeze's module finder (your app doesn't have to import it), freeze goes into an infinite loop of imports, eventually getting a 'maximum recursion depth' exception. This seems to be related to freeze getting confused between 'os.path' and Jason's 'path'. This is a bug in distutils. Thomas Hellers py2exe encounters the same bug. As much as I remember our conversation, he submitted a patch to distutils. In the meanwhile I renamed path.py to jpath.py, usings Jason's first letter in a motion of honour while circumventing this bug. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: Cursor navigation
Andy Dustman [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] This is untrue: cursor.scroll() is an optional DB-API 2.0 extension. http://www.python.org/peps/pep-0249.html MySQLdb supports this, but I do not know about your case. Yes 'cursor.scroll()' is optional and pySqlite supports it too, but pyPgSQL does not. Thanks for replying. -- TA -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Having path descend from str/unicode is extremely useful since I can then pass a path object to any function someone else wrote without having to worry about whether they were checking for basestring. I use path.py from Jason to encapsulate a lot of the windows plattform specialities of path dealing. Being able to use path-opjects at every place where I would use str or unicode is very essential, because I often use Python to tame Excel and Word. To open files within these programms needs some plain str as PATH for the file. (which, of course, can also be down by ways to convert PATH to STRING. Harald -- http://mail.python.org/mailman/listinfo/python-list
Re: find a specified dictionary in a list
Odd-R. wrote:
I have this list:
[{'i': 'milk', 'oid': 1}, {'i': 'butter', 'oid': 2},{'i':'cake','oid':3}]
All the dictionaries of this list are of the same form, and all the oids
are distinct. If I have an oid and the list, how is the simplest way of
getting the dictionary that holds this oid?
Something like this:
def oidfinder(an_oid, the_list):
for d in the_list:
if d['oid'] == an_oid:
return d
return None
# These are not the oids you are looking for.
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Re: Web frame systems vs. pure Python
I don't know what your project is, but a web framework might make your system more scalable and maintainable if it gets larger. They often provide useful mechanisms for maintaining state and persistance. Template systems IMHO should be considered separately from App frameworks (although they may be integrated). If you will frequently be rendering web pages that are predominantly static but augmented with dynamically generated/retrieved data, templates are a good way to go. However, they can confuse if your system is only simple. In that case, I wouldn't go for a full blown templating engine but 'roll my own' using python dictionaries and 'string interpolation' (a daft name as it isn't really interpolation). Furthermore, app frameworks are sometimes a pain to install on a webserver, particularly if you do not have control of it. It all depends on your project size, your willingness to spend some serious time climbing the learning curve associated with a framework, and the server you wish to deploy on. -- http://mail.python.org/mailman/listinfo/python-list
Separation of Code in CGI App
Hi, I need to create a planner/calendar system using python cgi scripts. It is my first CGI app (beyond a few tutorial examples). I wish to separate the code according to function. For instance, the code to handle the DB connection, SQL querying, HTML form variable retrieval, rendering of HTML via some sort of template system etc. Each will be a class instantiated when the CGI app is called. To do this, do I just create each of these classes in one, monolithic .cgi file? or is it possible to separate these out into different scripts and have a 'controller' script call them and pass the relevant parameters/data? I guess I could also store the python code in text files and use the 'execfile()' function, although it seems to me that would be an uneccasary performance hit. If that is possible, is that the right way to go? If not, suggestions would be gratefully recieved! -- http://mail.python.org/mailman/listinfo/python-list
Re: Building Python with Tcl/Tk on Cygwin_NT-5.1
Hi Jason, I downloaded your new Cygwin from http://cygwin.com and tried to build install Python/CDAT again. It appears to have built properly, but when I try to execute, it receive a sock error. How do I get around this problem? When I built Cygwin, I instructed it to install everything. Thanks in advance for your help and best regards, Dean -- http://mail.python.org/mailman/listinfo/python-list
Re: wxPython Fedora Core 4
Christophe Lambin enlightened us with: However, since your wxPython package wasn't built for FC4, you may run into other problems. That should be solved by recompiling the wxPython RPMs. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: Get directory from http web site
rock69 enlightened us with: I was wondering if there's some neat and easy way to get the entire contents of a directory at a specific web url address. [...] Is it possible to retrieve this list (not the physical files) and have it stored in a variable of type list or something? Check out the chapter on HTML parsing at http://www.diveintopython.org/ Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: find a specified dictionary in a list
John Machin wrote:
Odd-R. wrote:
I have this list:
[{'i': 'milk', 'oid': 1}, {'i': 'butter', 'oid': 2},{'i':'cake','oid':3}]
All the dictionaries of this list are of the same form, and all the oids
are distinct. If I have an oid and the list, how is the simplest way of
getting the dictionary that holds this oid?
Something like this:
def oidfinder(an_oid, the_list):
for d in the_list:
if d['oid'] == an_oid:
Better indented as:
if d['oid'] == an_oid:
return d
return None
# These are not the oids you are looking for.
--
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Python on a public library computer
This is about how to start a Python interpreter on a very locked down library computer. Some time ago I started a thread about it.(Google won't let me reply to older topics so I'm starting a new topic with the same title) A few days ago I found a Jython console applet that can be run from a webpage: http://tams-www.informatik.uni-hamburg.de/applets/jython/primacheck.html This opens a webpage (well, maybe after some editing, I can't get google to display this link on the same line) which after some time aks the user to sign an applet which then turns out to be a complete Jython editor and interpreter! I'm looking for the sourcecode of a project like this so that I can host such a page myself and include more modules. Can anyone reach the author or has anyone written something like it and is willing to share the code? Alternatively can someone give me some tips about how to write it myself? Currently I'm at the stage where I can compile and run the examples (and the applets!) on the Jython homepage. I'm still wondering about how to sign applets. Maybe the interpreter could be done by using the code.py module from Jython itself and just redirect stdin and stdout to an applet? Anton p.s. John Lee: You remembered correctly, such a thing exists. -- http://mail.python.org/mailman/listinfo/python-list
Re: find a specified dictionary in a list
On 2005-07-22, John Machin [EMAIL PROTECTED] wrote:
Odd-R. wrote:
I have this list:
[{'i': 'milk', 'oid': 1}, {'i': 'butter', 'oid': 2},{'i':'cake','oid':3}]
All the dictionaries of this list are of the same form, and all the oids
are distinct. If I have an oid and the list, how is the simplest way of
getting the dictionary that holds this oid?
Something like this:
def oidfinder(an_oid, the_list):
for d in the_list:
if d['oid'] == an_oid:
return d
return None
# These are not the oids you are looking for.
Thank you for your help, but I was hoping for an even simpler
solution, as I am suppose to use it in a
tal:block tal:define=p python: sentence.
Is there a simpler way of doing it? What if I assume that the
oid I'm searching for really exists?
Thanks again
--
Har du et kjøleskap, har du en TV
så har du alt du trenger for å leve
-Jokke Valentinerne
--
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Re: Difference between and '
Steven D'Aprano wrote: It may shock some people to learn that difference in the sense of mathematical subtraction is not the only meaning of the word, but there it is. One wouldn't, I hope, misunderstand What is the difference between spaghetti marinara and spaghetti pescatora? and attempt to subtract one from the other, since subtraction is not defined for foodstuffs. sum(ord(c) for c in 'spaghetti marinara') - sum(ord(c) for c in spaghetti pescatora) -119 Works for me... ;-) -- http://mail.python.org/mailman/listinfo/python-list
ANN: Spyce 2.0.3
Spyce 2.0.3 released Spyce is a python web application server, combining features of popular frameworks such as ASP.NET and JSP with Pythonic elegance. Spyce may be deployed as a standalone server, proxied behind Apache, under mod_python, FastCGI, or CGI. Spyce 2.0 includes features unique to Python web frameworks such as Active Handlers - reusable components without the leaky abstractions seen in ASP.NET et al. - http://spyce.sourceforge.net/docs/doc-lang_handlers.html Active Tag compiler - http://spyce.sourceforge.net/docs/doc-tag_new2.html 2.0.3 is a bugfix and documentation-improvement release. The installation section of the manual has received particular attention. There is also the new section on starting your first project (http://spyce.sourceforge.net/docs/doc-conf_next.html), which answers the FAQ, how do I organize my Spyce files. Demos and downloads are available at http://spyce.sourceforge.net/. Changelog is at http://svn-hosting.com/svn/spyce/trunk/spyce/CHANGES. Jonathan Ellis http://spyced.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: find a specified dictionary in a list
Odd-R. Hogstad wrote (in private e-mail, with scarcely private
contents):
In comp.lang.python, you wrote:
Odd-R. wrote:
I have this list:
[{'i': 'milk', 'oid': 1}, {'i': 'butter', 'oid': 2},{'i':'cake','oid':3}]
All the dictionaries of this list are of the same form, and all the oids
are distinct. If I have an oid and the list, how is the simplest way of
getting the dictionary that holds this oid?
Something like this:
def oidfinder(an_oid, the_list):
for d in the_list:
if d['oid'] == an_oid:
return d
return None
# These are not the oids you are looking for.
Thank you, however I was hoping for something even simpler,
as I am to use it in a tal:block tal:define="d python:
Sorry, I don't know what tal:block etc etc means.
And I don't know what "even simpler" could mean. Once you have the list
and have defined the function, you can simply deploy it wherever you
need the value.
current_oid = whatever
...
current_dict = oidfinder(current_oid, the_list)
Is this the only way to do it? What if I know that the oid
I am looking for is pressent?
Answering the 2nd question first: ignore the possiblility that the
oidfinder() will return None i.e. just chill out.
Other ways:
(a) use a list comprehension inline:
current_dict = [d for d in the_list if d['oid'] == current_oid][0]
# this is a tad ugly and will blow up if the sought oid is not present
-- but that can't happen, can it ? :-)
(b) preprocess the weird/baroque/byzantine list that you have got.
the_dict = {}
for d in the_list:
the_dict[d['oid']] = d
then you do this:
current_dict = the_dict[current_oid]
# Simpler than that it cannot be.
Now a couple of questions for you:
(1) Have you contemplated that an oid can appear more than once in the
list?
(2) What in tarnation is an "oid"?
Cheers,
John
--
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Re: Python on a public library computer
Anton Vredegoor enlightened us with: Some time ago I started a thread about it.(Google won't let me reply to older topics so I'm starting a new topic with the same title) Why not use a proper Usenet client? A few days ago I found a Jython console applet that can be run from a webpage: Nice! For giggles, try raise SystemExit() ;-) Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
tuple to string?
hiho, what's the clean way to translate the tuple (0x73, 0x70, 0x61, 0x6D) to the string 'spam'? TIA, Francois -- http://mail.python.org/mailman/listinfo/python-list
Re: Python on a public library computer
Sybren Stuvel wrote: Anton Vredegoor enlightened us with: Some time ago I started a thread about it.(Google won't let me reply to older topics so I'm starting a new topic with the same title) Why not use a proper Usenet client? Because he's on a public computer without one installed? -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference between and '
[EMAIL PROTECTED] Can someone tell me the difference between single quote and double quote? There is no strong reason to use one and avoid the other. Yet, while representing strings, Python itself has a _preference_ for single quotes. Programmers can put this duality to good use, by adopting reasonable conventions, which are nothing more than conventions! :-) I would guess many people choose one over the other for minimizing the amount of backslash escape needed. Some people keep double quotes for strings that would later undergo formatting, maybe because in most shells and some other languages, double quotes allow for substitution and single quotes prevent it. But in my opinion, while not dismissing a lot of wisdom developed within other languages, it may be foolish letting other languages blindly dictate what is best Python style. Personally, I keep single quotes for computer strings, and double quotes for human strings. To segregate between computer and human character for a string, I merely ask myself: If I wanted to use this program in another language, would I want this particular string translated or not?. Yes means double quotes, no means single quotes. As single quotes are often use within human text, as apostrophes, this was a wise choice as far as shell escaping goes. This is extendable to triple-quoted strings. I use triple-double quotes for doc strings meant to hold documentation, which is the usual case. If doc strings are used for BNF snippets, like with SPARK, or any other machine data, triple-single quotes are mandatory by my own convention. -- François Pinard http://pinard.progiciels-bpi.ca -- http://mail.python.org/mailman/listinfo/python-list
command line argument passing
hi to all, is it possible in python to pass arguments by using command prompt in windows 2000 and XP ? for example: sourceCode.py factorial 4 gives me the factorial of 4 namely 24. best regards -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference between and '
[Robert Kern] One habit that seems to crop up, though, is that I will use '' for internal strings and for strings that will eventually get seen by the user. Don't ask me why. One sure thing is that it would help, later, if you ever want to internationalise a Python program. Not that it occurs that often! :-) -- François Pinard http://pinard.progiciels-bpi.ca -- http://mail.python.org/mailman/listinfo/python-list
Re: tuple to string?
''.join((chr(e) for e in (0x73, 0x70, 0x61, 0x6D))) -- http://mail.python.org/mailman/listinfo/python-list
Re: tuple to string?
Francois De Serres wrote: hiho, what's the clean way to translate the tuple (0x73, 0x70, 0x61, 0x6D) to the string 'spam'? In [1]: t = (0x73, 0x70, 0x61, 0x6D) In [2]: ''.join(chr(x) for x in t) Out[2]: 'spam' -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: PEP on path module for standard library
Duncan Booth wrote: Personally I think the concept of a specific path type is a good one, but subclassing string just cries out to me as the wrong thing to do. In other words, to me a path represents something in a filesystem, the fact that it has one, or indeed several string representations does not mean that the path itself is simply a more specific type of string. You should need an explicit call to convert a path to a string and that forces you when passing the path to something that requires a string to think whether you wanted the string relative, absolute, UNC, uri etc. Duncan, are you another formerly non-user of path who has this opinion, or have you already attempted to use path extensively in your code? I'm not saying I dismiss the opinions of those who haven't actually tried working with a string-based path object, but it's worth considering that you might adopt a different opinion after using it for a while. I did. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: tuple to string?
Francois De Serres wrote: hiho, what's the clean way to translate the tuple (0x73, 0x70, 0x61, 0x6D) to the string 'spam'? mytuple = (0x73, 0x70, 0x61, 0x6D) ''.join(chr(v) for v in mytuple) 'spam' -- http://mail.python.org/mailman/listinfo/python-list
Re: tuple to string?
Francois De Serres wrote: hiho, what's the clean way to translate the tuple (0x73, 0x70, 0x61, 0x6D) to the string 'spam'? one way is to use a list expression: ''.join([chr(c) for c in (0x73, 0x70, 0x61, 0x6D)]) 'spam' another is to use map: ''.join(map(chr, (0x73, 0x70, 0x61, 0x6D))) 'spam' HTH, deelan. -- deelan, #1 fan of adriana lima! http://www.deelan.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: command line argument passing
Hayri ERDENER wrote: hi to all, is it possible in python to pass arguments by using command prompt in windows 2000 and XP ? for example: sourceCode.py factorial 4 gives me the factorial of 4 namely 24. Yes, the arguments are available as a list in sys.argv . Remember that you need to import sys before you can access that, and that the values will be returned as strings, so if they should be treated as numbers it's up to you to convert them. Use of the getopt or optparse modules is recommended to work with command line arguments more effectively. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: command line argument passing
just remember: sys.argv[0] == script name http://www.artima.com/weblogs/viewpost.jsp?thread=4829 -- http://mail.python.org/mailman/listinfo/python-list
Re: command line argument passing
Hayri ERDENER schrieb: hi to all, is it possible in python to pass arguments by using command prompt in windows 2000 and XP ? for example: sourceCode.py factorial 4 gives me the factorial of 4 namely 24. best regards import sys print sys.argv Or use the optparse module. Docs: http://www.python.org/doc/2.4.1/lib/module-optparse.html Bye, Dennis -- http://mail.python.org/mailman/listinfo/python-list
broken links
How can I find broken links (links that point to files that do not exist) in a directory and remove them using Python? I'm working on RHEL4 Thanks, rbt -- http://mail.python.org/mailman/listinfo/python-list
Re: find a specified dictionary in a list
Odd-R. wrote:
On 2005-07-22, John Machin [EMAIL PROTECTED] wrote:
Odd-R. wrote:
I have this list:
[{'i': 'milk', 'oid': 1}, {'i': 'butter', 'oid': 2},{'i':'cake','oid':3}]
All the dictionaries of this list are of the same form, and all the oids
are distinct. If I have an oid and the list, how is the simplest way of
getting the dictionary that holds this oid?
Something like this:
def oidfinder(an_oid, the_list):
for d in the_list:
if d['oid'] == an_oid:
return d
return None
# These are not the oids you are looking for.
Thank you for your help, but I was hoping for an even simpler
solution, as I am suppose to use it in a
tal:block tal:define=p python: sentence.
Is there a simpler way of doing it? What if I assume that the
oid I'm searching for really exists?
If you really, really, really don't care about proper error handling,
both of these expressions should work: (warning, untested since I'm at
work)
right_oid = [d for d in dictlist if d['oid']==the_oid][0]
right_oid = (d for d in dictlist if d['oid']==the_oid).next()
The last one more efficient as a generator expression, but requires
Python2.4. Both of these error in Really Bad Ways (range error and
StopIteration exceptions, respectively) if the right dictionary isn't
in the list.
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is this possible?
Is it possible to print a PDF file using python without having acrobat reader installed on the machine?? -- http://mail.python.org/mailman/listinfo/python-list
Re: Difference between and '
Peter Hansen wrote:
Steven D'Aprano wrote:
It may shock some people to learn that difference in the sense of
mathematical subtraction is not the only meaning of the word, but
there it is. One wouldn't, I hope, misunderstand What is the
difference between spaghetti marinara and spaghetti pescatora? and
attempt to subtract one from the other, since subtraction is not
defined for foodstuffs.
sum(ord(c) for c in 'spaghetti marinara') - sum(ord(c) for c in
spaghetti pescatora)
-119
Works for me... ;-)
Works for me too:
C:\junkpython --fuzzy --punt
Python 9.4.1 (#165, Mar 30 3005, 09:13:57) [MSC v.13109 1024 bit
(Intel)] on win1024
Type help, copyright, credits or license for more information.
a = foodstuff('spaghetti marinara')
b = foodstuff('spaghetti pescatora')
a - b
0
explain
a.base is b.base
a.topping != b.topping
but
fuzzy mode selected
a.topping isa salty_smelly_stuff
b.topping isa salty_smelly_stuff
punt mode selected
prob(customer_knows_difference) = 0.01
PSF interdiction
all your operator are belong to us
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Re: broken links
I found it: os.path.exists(path) On Fri, 2005-07-22 at 09:22 -0400, rbt wrote: How can I find broken links (links that point to files that do not exist) in a directory and remove them using Python? I'm working on RHEL4 Thanks, rbt -- http://mail.python.org/mailman/listinfo/python-list
Re: dictionary that discards old items
Will McGugan wrote: You want a Least Recently Used, or LRU, cache. Here's one: Thanks. I found the one I saw originally in the Python Cookbook. Only they call it a FIFO cache. A FIFO cache is different, as gene tani points out. You need to consider which one it is you want. -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
time.time() under load between two machines
I am working on some code using python and a distributed system. Some particular message is sent on one machine (with a timestamp logged) and after the message is received, a timestamp is made. I am having problems with negative latencies happening under intense CPU load. There is ntp sync happening so the machines should be very well in sync. Example: machine1 sendTime = time.time() Call to send message machine2 --- Got a message recvTime = time.time() Latency = recvTime-sendTime is NEGATIVE Is it possible that the CPU load is affecting the accuracy of the time.time() call, or that the relative difference in CPU load between the machines is causing this delta inaccuracy? Any help would be appreciated. Kyle Harrigan -- http://mail.python.org/mailman/listinfo/python-list
Re: time.time() under load between two machines
[EMAIL PROTECTED] wrote: I am working on some code using python and a distributed system. Some particular message is sent on one machine (with a timestamp logged) and after the message is received, a timestamp is made. I am having problems with negative latencies happening under intense CPU load. How negative are we talking about? What platforms are you using? -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
