Chicago Python Users Group, April 14
The Chicago Python User Group, ChiPy, will have its next meeting on Thursday, April 14th, starting at 7pm. For more information on ChiPy see http://chipy.org Michael Tobis, who is organizing this meeting, needs to give the building a list of names. If you think it's possible you will come, send email to [EMAIL PROTECTED] so he can put you on the list, and bring an ID. Presentation Topic: Subversion and Making Apples from Applesauce The goal of the Subversion project is to build a version control system that is a compelling replacement for CVS in the open source community. Brian Fitzpatrick will tell us about how to use Subversion, the Python bindings, and about cvs2svn, which he was one of the leads on-- Fitz says that 'cvs2svn is the most difficult piece of code I've ever written--I'm going to write a paper for CodeCon next year about it called Making Apples from Applesauce. ' There will also be time to chat, and many opportunities to ask questions. We encourage people at all levels to attend. Location This month we will be meeting again at the historic Monadnock Building in Downtown Chicago, at 53 W Jackson St. (in the loop at Jackson Dearborn). It is convenient to all CTA lines. Parking lots are available nearby, but expect to pay about $9. About ChiPy --- ChiPy meets once a month, on the second Thursday of the month. If you can't come this month, please join our mailing list: http://lonelylion.com/mailman/listinfo/chipy -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
NetworkX first public release (NX-0.2)
NetworkX is a Python package for the creation, manipulation, and study of the structure, dynamics, and functions of complex networks. The potential audience includes mathematicians, physicists, biologists, computer scientists, and social scientists. http://networkx.sourceforge.net Aric Hagberg Pieter Swart Dan Schult -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
SoCal Python Interest Group, April 19
If you live in the Los Angeles/Orange County area and would like to meet fellow Pythonistas, please consider attending the SoCal Piggies meeting on Tuesday April 19 at 7:30 PM, at the Kerckhoff Marine Lab in Newport Beach. Details are available at http://agile.unisonis.com/socalpiggies . There's also a mailing list you can join at http://lists.idyll.org/listinfo/socal-piggies . Hope to see you there! Grig -- http://mail.python.org/mailman/listinfo/python-announce-list Support the Python Software Foundation: http://www.python.org/psf/donations.html
Re: Python 2.4 killing commercial Windows Python development ?
And, also, with dotNET-framework -- http://mail.python.org/mailman/listinfo/python-list
Module for handling Nested Tables in HTML
Hi guys, Can anyone suggest some good tool for handling nested tables in a HTML page... BeautifulSoup is somehow not working with Nested Tables. Thanks and Regards, Garry -- http://mail.python.org/mailman/listinfo/python-list
Re: Best editor?
Mike Meyer wrote: Yup, that's why emacs stands for Eighty Megabytes And Constantly Swapping. ;-) Gee, it's changed from eight to eighty. Probably because eight is a small app by todays standards. Then again, it's not like 80 is large these days. my emacs starts in no time at all, and consumes just under 6 megs with python- mode and a couple of moderately-sized python modules in memory. that's just over 1% of the available memory on this stock hardware. guess my emacs is broken. /F -- http://mail.python.org/mailman/listinfo/python-list
HTTPSConnection script fails, but only on some servers (long)
This is driving me up the wall... any help would be MUCH appreciated.
I have a module that I've whittled down into a 65-line script in
an attempt to isolate the cause of the problem.
(Real domain names have been removed in everything below.)
SYNOPSIS:
I have 2 target servers, at https://A.com and https://B.com.
I have 2 clients, wget and my python script.
Both clients are sending GET requests with exactly the
same urls, parameters, and auth info.
wget works fine with both servers.
The python script works with server A, but NOT with server B.
On Server B, it provoked a Bad Gateway error from Apache.
In other words, the problem seems to depend on both the client
and the server. Joy.
Logs on server B show malformed URLs ONLY when the client
is my python script, which suggests the script is broken...
but logs on server A show no such problem, which suggests
the problem is elsewhere.
DETAILS
Note, the module was originally written for the express
purpose of working with B.com; A.com was added as a point of reference
to convince myself that the script was not totally insane.
Likewise, wget was tried when I wanted to see if it might be
a client problem.
Note the servers are running different software and return different
headers. wget -S shows this when it (successfully) hits url A:
1 HTTP/1.1 200 OK
2 Date: Tue, 12 Apr 2005 05:23:54 GMT
3 Server: Zope/(unreleased version, python 2.3.3, linux2) ZServer/1.1
4 Content-Length: 37471
5 Etag:
6 Content-Type: text/html;charset=iso-8859-1
7 X-Cache: MISS from XXX.com
8 Keep-Alive: timeout=15, max=100
9 Connection: Keep-Alive
... and this when it (successfully) hits url B:
1 HTTP/1.1 200 OK
2 Date: Tue, 12 Apr 2005 04:51:30 GMT
3 Server: Jetty/4.2.9 (Linux/2.4.26-g2-r5-cti i386 java/1.4.2_03)
4 Via: 1.0 XXX.com
5 Content-Length: 0
6 Connection: close
7 Content-Type: text/plain
Only things notable to me, apart from the servers are the Via: and
Connection: headers. Also the Content-Length: 0 from B is odd, but
that doesn't seem to be a problem when the client is wget.
Sadly I don't grok HTTP well enough to spot anything really
suspicious.
The apache ssl request log on server B is very interesting.
When my script hits it, the request logged is like:
A.com - - [01/Apr/2005:17:04:46 -0500] GET
https://A.com/SkinServlet/zopeskin?action=updateSkinIdfacilityId=1466skinId=406
HTTP/1.1 502 351
... which apart from the 502, I thought reasonable until I realized
there's
not supposed to be a protocol or domain in there at all. So this is
clearly
wrong. When the client is wget, the log shows something more sensible
like:
A.com - - [01/Apr/2005:17:11:04 -0500] GET
/SkinServlet/zopeskin?action=updateSkinIdfacilityId=1466skinId=406
HTTP/1.0 200 -
... which looks identical except for not including the spurious
protocol and domain, and the response looks as expected (200 with size
0).
So, that log appears to be strong evidence that the problem is in my
client
script, right? The failing request is coming in with some bad crap in
the path, which Jboss can't handle so it barfs and Apache responds with
Bad Gateway. Right?
So why does the same exact client code work when hitting server B??
No extra gunk in the logs there. AFAICT there is nothing in the script
that could lead to such an odd request only on server A.
THE SCRIPT
#!/usr/bin/python2.3
from httplib import HTTPSConnection
from urllib import urlencode
import re
import base64
url_re = re.compile(r'^([a-z]+)://([A-Za-z0-9._-]+)(:[0-9]+)?')
target_urls = {
'B': 'https://B/SkinServlet/zopeskin',
'A': 'https://A/zope/manage_main',
}
auth_info= {'B':('userXXX', 'passXXX'),
'A':('userXXX', 'passXXX'),
}
def doRequest(target, **kw):
Provide a trivial interface for doing remote calls.
Keyword args are passed as query parameters.
url = target_urls[target]
user, passwd = auth_info[target]
proto,host,port=url_re.match(url).groups()
if port:
port = int(port[1:]) # remove the ':' ...
else:
port = 443
creds = base64.encodestring(%s:%s % (user, passwd))
headers = {Authorization: Basic %s % creds }
params = urlencode(kw).strip()
if params:
url = '%s?%s' % (url, params)
body = None # only needed for POST
args =('GET', url, body, headers)
print ARGS: %s % str(args)
conn = HTTPSConnection(host)
conn.request(*args)
response = conn.getresponse()
data = response.read()
if response.status = 300:
print
msg = '%i ERROR reported by remote system %s\n' %
(response.status,
url)
msg += data
raise IOError, msg
print OK!
return data
if __name__ == '__main__':
print attempting to connect...
result1 = doRequest('A', skey='id', rkey='id')
result2 = doRequest('B', action='updateSkinId',
skinId='406', facilityId='1466')
print done!
# EOF
Problem with downloading from www
I use Python 2.3 on Windows XP.
I wrote this program:
import httplib
conn = httplib.HTTPConnection(www.x.net)
conn.request(GET, /x/y.jpg)
r1 = conn.getresponse()
print r1.status, r1.reason
data = r1.read()
datei = open('test.jpg','w')
datei.write(data)
datei.close()
It is almost a copy of the manual. Now I can establish the connection and
receive the data. (The first response from the server is 200, OK.) The jpg
file is 198 K. But it is not a valid jpeg file. When I download with my
browser, the file has the length 197K and it is valid, of course. Is this
a problem of writing text or binary data to a file? Can anybody help me?
TIA,
nff
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--
http://mail.python.org/mailman/listinfo/python-list
Re: Module for handling Nested Tables in HTML
Gurpreet Sachdeva wrote: Can anyone suggest some good tool for handling nested tables in a HTML page... BeautifulSoup is somehow not working with Nested Tables. sounds strange. have you tested the latest release? (2.0) http://www.crummy.com/software/BeautifulSoup/ if you cannot get BS to work, and the author cannot help you, you might consider using an HTML-XML converter, and using your favourite XML tool to pull apart the result. some alternatives: http://utidylib.berlios.de/ http://effbot.org/zone/element-tidylib.htm /F -- http://mail.python.org/mailman/listinfo/python-list
some sort of permutations...
hello, i'm looking for a way to have all possible length fixed n-uples from a list, i think generators can help, but was not able to do it myself, maybe some one could point me out to an idea to do it ? for example, from : l = [0, 1, 2, 3, 4] and searching for n-uples of 3, i should produce : ( (0, 1, 2), (0, 1, 3), (0, 1, 4), (0, 2, 3), (0, 2, 4), (0, 3, 4), (1, 2, 3), (1, 2, 4), (1, 3, 4), (2, 3, 4), ) does the set module or itertools can help in such cases ? i still have missed the black magic behind itertools... best regards -- http://mail.python.org/mailman/listinfo/python-list
Re: Problem with downloading from www
NewFilmFan [EMAIL PROTECTED] wrote:
I wrote this program:
import httplib
conn = httplib.HTTPConnection(www.x.net)
conn.request(GET, /x/y.jpg)
r1 = conn.getresponse()
print r1.status, r1.reason
data = r1.read()
datei = open('test.jpg','w')
datei.write(data)
datei.close()
if all you want to do is to download files from the web, urllib is a lot more
convenient:
urllib.urlretrieve(http://www.x.net/x.y.jpg;, test.jpg)
It is almost a copy of the manual. Now I can establish the connection and
receive the data. (The first response from the server is 200, OK.) The jpg
file is 198 K. But it is not a valid jpeg file. When I download with my
browser, the file has the length 197K and it is valid, of course. Is this
a problem of writing text or binary data to a file?
changing the open() call to
datei = open('test.jpg','wb')
should fix this.
see the library documentation for details.
/F
--
http://mail.python.org/mailman/listinfo/python-list
Re: semicolons
Mage mage at mage.hu writes: I amafraid of I will stop using semicolons in other languages after one or two months of python. However I see that python simply ignores the semicolons atd the end of the lines. I notice that when switching between Python and Delphi I'll sometimes type if ... then ... constructs in Python or if ... : in Delphi, or define classes the wrong way, but I get used to the different syntax extremely quickly (I might make a mistake once or twice, that's it). Same goes for semicolons. So I wouldn't worry about it, just write Python in Python, PHP in PHP, C in C, etc. The semicolons are only a very small part of the differences between languages and their absence is detected by the compiler when you forget them. Yours, Andrei -- http://mail.python.org/mailman/listinfo/python-list
Re: some sort of permutations...
Bernard A. wrote: i'm looking for a way to have all possible length fixed n-uples from a list, i think generators can help, but was not able to do it myself, maybe some one could point me out to an idea to do it ? did you try googling for python permutations ? here's the first hit: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465 /F -- http://mail.python.org/mailman/listinfo/python-list
Re: NSInstaller Vs. Inno Setup
Hello dcrespo, Any comments? I'm happy with Inno. Bye. -- Miki Tebeka [EMAIL PROTECTED] http://tebeka.bizhat.com The only difference between children and adults is the price of the toys pgpdEFt0Cm0o9.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: I've broken PythonWin2.4 - Dialogs don't pop up!
Michael Murdock: Rebooting does not help. I uninstalled and removed everything from c:\python2.4 and then downloaded and installed the latest version. Right after installing it, everything worked fine. But when I rebooted, the problem came back. Do you have a copy of win32ui.pyd on the system path? Neil -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Tuesday 12 April 2005 06:36 am Steven Bethard wrote: Uwe Mayer wrote: I've been looking into ways of creating singleton objects. It strikes me that I've never wanted or needed a singleton object. Would you mind sharing your use case? I'm just curious. I am using a class to manage configuration settings in an application. This object should only existe once so that when the user changes a setting through a configuration dialog the change imminent in all locations where access to config settings are needed. I was using a factory function bevore, but since I am starting to use Python 2.4 and I remembered having read about a singleton-decorator I went to look deeper into the possibilities. Ciao Uwe -- http://mail.python.org/mailman/listinfo/python-list
Re: web authoring tools
Brandon J. Van Every wrote: =?iso-8859-15?Q?Pierre-Fr=E9d=E9ric_Caillaud?= [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Ideally, I would like an open source website + html design tool implemented in Python didn't you just say that ideally, you wanted a tool written in lisp or scheme? I honestly got a little tired of the tone of the answers I was getting from that crowd, about what an idiot I am. My query there is still You mean you are interested in a web application programming framework in the spirit of Seaside, or in a HTML/CSS editor in the spirit of Dreamweaver ? I believe Dreamweaver-esque. I see myself writing articles and eventually doing snazzy eye candy layouts. I do not see myself engaging in elaborate flow control or anything terribly programmatic. I want to concentrate on the content, not the mechanism. I've stayed out of this one so far because of a natural disinclination to join religious discussions, but sine we are now talking good common sense I'd like to ask whether a *batch-oriented* system for folding database content into a static web site with common look-and-feel would be of interest. Now PyCon is over I've been able to blog about the techniques used to generate the web site at http://www.holdenweb.com/, and most recently about using reStructured Text in the database to ease authorship problems for the less-taxing content. See http://www.holdenweb.com/blogs/2005/04/versioned-reviews-implemented-post.html to determine whether the overall approach would work for you. regards Steve -- Steve Holden+1 703 861 4237 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: HTTPSConnection script fails, but only on some servers (long)
Paul Winkler wrote:
This is driving me up the wall... any help would be MUCH appreciated.
I have a module that I've whittled down into a 65-line script in
an attempt to isolate the cause of the problem.
(Real domain names have been removed in everything below.)
SYNOPSIS:
I have 2 target servers, at https://A.com and https://B.com.
I have 2 clients, wget and my python script.
Both clients are sending GET requests with exactly the
same urls, parameters, and auth info.
wget works fine with both servers.
The python script works with server A, but NOT with server B.
On Server B, it provoked a Bad Gateway error from Apache.
In other words, the problem seems to depend on both the client
and the server. Joy.
Logs on server B show malformed URLs ONLY when the client
is my python script, which suggests the script is broken...
but logs on server A show no such problem, which suggests
the problem is elsewhere.
DETAILS
Note, the module was originally written for the express
purpose of working with B.com; A.com was added as a point of reference
to convince myself that the script was not totally insane.
Likewise, wget was tried when I wanted to see if it might be
a client problem.
Note the servers are running different software and return different
headers. wget -S shows this when it (successfully) hits url A:
1 HTTP/1.1 200 OK
2 Date: Tue, 12 Apr 2005 05:23:54 GMT
3 Server: Zope/(unreleased version, python 2.3.3, linux2) ZServer/1.1
4 Content-Length: 37471
5 Etag:
6 Content-Type: text/html;charset=iso-8859-1
7 X-Cache: MISS from XXX.com
8 Keep-Alive: timeout=15, max=100
9 Connection: Keep-Alive
... and this when it (successfully) hits url B:
1 HTTP/1.1 200 OK
2 Date: Tue, 12 Apr 2005 04:51:30 GMT
3 Server: Jetty/4.2.9 (Linux/2.4.26-g2-r5-cti i386 java/1.4.2_03)
4 Via: 1.0 XXX.com
5 Content-Length: 0
6 Connection: close
7 Content-Type: text/plain
Only things notable to me, apart from the servers are the Via: and
Connection: headers. Also the Content-Length: 0 from B is odd, but
that doesn't seem to be a problem when the client is wget.
Sadly I don't grok HTTP well enough to spot anything really
suspicious.
The apache ssl request log on server B is very interesting.
When my script hits it, the request logged is like:
A.com - - [01/Apr/2005:17:04:46 -0500] GET
https://A.com/SkinServlet/zopeskin?action=updateSkinIdfacilityId=1466skinId=406
HTTP/1.1 502 351
... which apart from the 502, I thought reasonable until I realized
there's
not supposed to be a protocol or domain in there at all. So this is
clearly
wrong. When the client is wget, the log shows something more sensible
like:
A.com - - [01/Apr/2005:17:11:04 -0500] GET
/SkinServlet/zopeskin?action=updateSkinIdfacilityId=1466skinId=406
HTTP/1.0 200 -
... which looks identical except for not including the spurious
protocol and domain, and the response looks as expected (200 with size
0).
So, that log appears to be strong evidence that the problem is in my
client
script, right? The failing request is coming in with some bad crap in
the path, which Jboss can't handle so it barfs and Apache responds with
Bad Gateway. Right?
So why does the same exact client code work when hitting server B??
No extra gunk in the logs there. AFAICT there is nothing in the script
that could lead to such an odd request only on server A.
THE SCRIPT
#!/usr/bin/python2.3
from httplib import HTTPSConnection
from urllib import urlencode
import re
import base64
url_re = re.compile(r'^([a-z]+)://([A-Za-z0-9._-]+)(:[0-9]+)?')
target_urls = {
'B': 'https://B/SkinServlet/zopeskin',
'A': 'https://A/zope/manage_main',
}
auth_info= {'B':('userXXX', 'passXXX'),
'A':('userXXX', 'passXXX'),
}
def doRequest(target, **kw):
Provide a trivial interface for doing remote calls.
Keyword args are passed as query parameters.
url = target_urls[target]
user, passwd = auth_info[target]
proto,host,port=url_re.match(url).groups()
if port:
port = int(port[1:]) # remove the ':' ...
else:
port = 443
creds = base64.encodestring(%s:%s % (user, passwd))
headers = {Authorization: Basic %s % creds }
params = urlencode(kw).strip()
if params:
url = '%s?%s' % (url, params)
body = None # only needed for POST
args =('GET', url, body, headers)
print ARGS: %s % str(args)
conn = HTTPSConnection(host)
conn.request(*args)
response = conn.getresponse()
data = response.read()
if response.status = 300:
print
msg = '%i ERROR reported by remote system %s\n' %
(response.status,
url)
msg += data
raise IOError, msg
print OK!
return data
if __name__ == '__main__':
print attempting to connect...
result1 = doRequest('A', skey='id', rkey='id')
result2 = doRequest('B', action='updateSkinId',
skinId='406', facilityId='1466')
print done!
# EOF
So... what
How to minimize the window
I wrote a GUI program with wxPython. In the window, there are 3 attributes on left top. _ could let the program to minimize to tool bar. I want to let the program minimized to the system tray. Is there any way to let the window have 4 attributes? . _ O x -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Uwe Mayer wrote: Tuesday 12 April 2005 06:36 am Steven Bethard wrote: Uwe Mayer wrote: I've been looking into ways of creating singleton objects. It strikes me that I've never wanted or needed a singleton object. Would you mind sharing your use case? I'm just curious. I am using a class to manage configuration settings in an application. This object should only existe once so that when the user changes a setting through a configuration dialog the change imminent in all locations where access to config settings are needed. Ahh, I see. I would typically just use a module in this situation, where the configuration settings were just names global to the module. Is there a benefit to using a singleton object over using just a module? STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Uwe Mayer wrote: Tuesday 12 April 2005 06:36 am Steven Bethard wrote: Uwe Mayer wrote: I've been looking into ways of creating singleton objects. It strikes me that I've never wanted or needed a singleton object. Would you mind sharing your use case? I'm just curious. I am using a class to manage configuration settings in an application. This object should only existe once so that when the user changes a setting through a configuration dialog the change imminent in all locations where access to config settings are needed. In this case, you may want to read http://www.aleax.it/5ep.html Grüße Reinhold -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 killing commercial Windows Python development ?
Martin v. Löwis wrote: For developers that need msvcr71.dll on the target system which don't have a license to distribute it, the solution is simple: they just need to advise their users to install python-2.4.1.msi. This comes with msvcr71.dll included. I understand this, and it's obviously a solution. Unfortunately it defeats the whole point of me 'freezing' my code in the first place. The main feature (for me) of the way I could use this, was to create a simple Java launcher that didn't require the user to install anything extra, or end up with a whole stack of unused data on their machine. They would see a .exe file, a dll and a pyd, and then the actual application files, and that was it. It may be fine for a 'knowledgeable' user to install python etc., but not for everyone. Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: NSInstaller Vs. Inno Setup
In message [EMAIL PROTECTED], Martin v. Löwis [EMAIL PROTECTED] writes dcrespo wrote: Any comments? MSI. MSI fails on every NT 4 system I've seen. Even with all the patches from Microsoft. Inno Setup wins every time in this situation. Its also a lot less hassle than MSI for what I need. Stephen -- Stephen Kellett Object Media Limitedhttp://www.objmedia.demon.co.uk RSI Information:http://www.objmedia.demon.co.uk/rsi.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 killing commercial Windows Python development ?
Do Re Mi chel La Si Do wrote: Hi ! This DLL come also with MS-JVM engine, who is free. Therefore... This is very true (and the .NET suggestion as well). However, why should I require an end-user to install MS-JVM or the .NET framework, purely for a simple little launcher application ? The main application it launches is Java, but there's no way it would run on the MS-JVM, and .NET just gives a load more technology that we don't really need (and is a bigger install than the entire application). Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 killing commercial Windows Python development ?
A.B., Khalid wrote: Kindly note that the Python source distribution does include project files for building Python 2.4 with MSVC6. Add to that the fact that with pyMinGW[1] one can build yet another Windows distribution not dependent on mscvr71.dll and some of the logic about not upgrading to Python 2.4, IMHO, just goes away. An official release of installers for either or both versions would I think complicate matters: more choices translate to more confusion. Needless to say that extension authors (for Python 2.4) would then need to make two binaries for every extension they release for Python 2.4: one for the mscvr71.dll dependent Python distribution, and another one for the mscvrt.dll dependent version(s). This I think would hurt Python and its users. The solution is to have those that know enough to really need to build Python on their own according to their requirments. They would then have to deal with compiling the Python 2.4 extensions themselves, of course. But this would make things simple and hopefully address the needs of everyone. This is all very true, and a fair point of what is achievable. It just seems unfortunate that a developer is required to get involved in C compilation and looking after all module dependencies, purely to use Python in a commercial environment. I write Java as my main language. It's what I'm paid to do, and I've spent the best part of the last 8 years doing so. Over the last couple of years, I've been toying with Python, and trying to find ways to integrate it with my daily routine - I now have a complete internal build system written with it, along with several utility scripts. I don't code C. I could probably blag it at a very slow pace, but I'm not going to be given time to play with it. We have some C developers, but again, no resource allocation will ever be made to compile a language that isn't used for the mainstream software we produce. All I'm trying to do is use python wherever I can without having to persuade those in power that it would be a valuable asset (as this would probably be a waste of breath in many circumstances), and yet I can't (from 2.4 at least) because it requires more time and cost to be allocated. I would guess from the responses so far that Python 2.4 just isn't used within commercially shipping products, or is quietly used by an product so as not to incur any legal wrath that might be found. Perhaps it isn't quite ready for what I want to achieve. I don't know. I just know that I am spending the rest of the day migrating back to 2.3 where I will stay. Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: How to minimize the window
Austin [EMAIL PROTECTED] schrieb im Newsbeitrag news:[EMAIL PROTECTED] |I wrote a GUI program with wxPython. | In the window, there are 3 attributes on left top. | _ could let the program to minimize to tool bar. | I want to let the program minimized to the system tray. You can take look at Main.py in the wx Demo. Look for class DemoTaskBarIcon(wx.TaskBarIcon) and how it is used in the wxPythonDemo class. | Is there any way to let the window have 4 attributes? | . _ O x Not that I know of. HTH, -- Vincent Wehren -- http://mail.python.org/mailman/listinfo/python-list
Re: args attribute of Exception objects
Thank you guys for those good advices (and the very interesting example of AST hacking). However, this was an example of use for Exception.args. It does not alleviate my concerns about the fact that the args attribute is poorly designed for standard Exceptions. It is as if the Exception design was only made for end users (display of a string in an interpreter) without thinking about original ways to use them :-) Seb -- http://mail.python.org/mailman/listinfo/python-list
Re: variables exist
Brian van den Broek [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] I'm a hobbyist and still learning, but the claim the try/except is lousy Python surprise me a bit. I think it wasn't the use of try/except as such. It's more that if you're the developer you ought to know whether variables are defined or not. It might be a sign you're using global variables more often than would be considered good style in Python. -- http://mail.python.org/mailman/listinfo/python-list
Python license (2.3)
I have made a module derived from the Queue module deliverd with python 2.3. I would like to make this module (called tube) available for other people. However it is not clear to me how I can do this in accordance with the python license. First of all it seems I have to make a sumary of how my module differs from the original. Second it seems I have to include the following in my code: Copyright (c) 2001, 2002 Python Software Foundation; All Rights Reserved Do I understand correctly? Because I don't mind the first but I'm not so happy with the second. Are there other things I have to watch out for? -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Uwe Mayer wrote: It strikes me that I've never wanted or needed a singleton object. Would you mind sharing your use case? I'm just curious. I am using a class to manage configuration settings in an application. This object should only existe once so that when the user changes a setting through a configuration dialog the change imminent in all locations where access to config settings are needed. So use a module-level object, and be done with it. Or if you're using an application object (you should), just add a config object to the application object (app.config.param = ...). Or use a module to hold the configuration data (import config; config.param = ...); serializing to and from module variables work really well in Python. I was using a factory function bevore, but since I am starting to use Python 2.4 and I remembered having read about a singleton-decorator I went to look deeper into the possibilities. I'm sure your users would love you even more if you spend that time and energy adding stuff to the application... ;-) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: How to minimize the window
Austin wrote: I wrote a GUI program with wxPython. In the window, there are 3 attributes on left top. _ could let the program to minimize to tool bar. I want to let the program minimized to the system tray. Is there any way to let the window have 4 attributes? . _ O x These features of window behavior are normally handled by the Windows or X Window window manager code. Though you can reach behind the interface and change them, it might be easier simply to have a Migrate to System Tray button inside your system's GUI. This could toggle to Normal Iconisation when the window only appeared int he system tray. Or, you could do what the Windows Task Manager does, and provide both a standard icon *and* a system tray icon. Noticed you seem to be pretty new to c.l.py, so while I have your attention: welcome aboard! regards Steve -- Steve Holden+1 703 861 4237 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Why does StringIO discard its initial value?
Raymond Hettinger wrote: [Leif K-Brooks] The obvious workaround is to call buffer.write() with the initial value instead of passing it to StringIO's constructor, More than just a workaround, it is the preferred approach. That makes is easier to switch to cStringIO where initialized objects are read-only. Others may find this helpful ; it's a pure Python wrapper for cStringIO that makes it behave like StringIO in not having initialized objects readonly. Would it be an idea to extend cStringIO like this in the standard library? It shouldn't lose performance if used like a standard cStringIO, but it prevents frustration :-) David class StringIO: def __init__(self, buf = ''): if not isinstance(buf, (str, unicode)): buf = str(buf) self.len = len(buf) self.buf = cStringIO.StringIO() self.buf.write(buf) self.buf.seek(0) self.pos = 0 self.closed = 0 def __iter__(self): return self def next(self): if self.closed: raise StopIteration r = self.readline() if not r: raise StopIteration return r def close(self): Free the memory buffer. if not self.closed: self.closed = 1 del self.buf, self.pos def isatty(self): if self.closed: raise ValueError, I/O operation on closed file return False def seek(self, pos, mode = 0): if self.closed: raise ValueError, I/O operation on closed file self.buf.seek(pos, mode) self.pos = self.buf.tell() def tell(self): if self.closed: raise ValueError, I/O operation on closed file return self.pos def read(self, n = None): if self.closed: raise ValueError, I/O operation on closed file if n == None: r = self.buf.read() else: r = self.buf.read(n) self.pos = self.buf.tell() return r def readline(self, length=None): if self.closed: raise ValueError, I/O operation on closed file if length is not None: r = self.buf.readline(length) else: r = self.buf.readline(length) self.pos = self.buf.tell() return r def readlines(self): if self.closed: raise ValueError, I/O operation on closed file lines = self.buf.readlines() self.pos = self.buf.tell() return lines def truncate(self, size=None): if self.closed: raise ValueError, I/O operation on closed file self.buf.truncate(size) self.pos = self.buf.tell() self.buf.seek(0, 2) self.len = self.buf.tell() self.buf.seek(self.pos) def write(self, s): if self.closed: raise ValueError, I/O operation on closed file origpos = self.buf.tell() self.buf.write(s) self.pos = self.buf.tell() if origpos + len(s) self.len: self.buf.seek(0, 2) self.len = self.buf.tell() self.buf.seek(self.pos) def writelines(self, lines): if self.closed: raise ValueError, I/O operation on closed file self.buf.writelines(lines) self.pos = self.buf.tell() self.buf.seek(0, 2) self.len = self.buf.tell() self.buf.seek(self.pos) def flush(self): if self.closed: raise ValueError, I/O operation on closed file self.buf.flush() def getvalue(self): if self.closed: raise ValueError, I/O operation on closed file return self.buf.getvalue() -- http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Sizer == Sizer [EMAIL PROTECTED] writes: Sizer Looking at my followup, I really didn't make it clear that Sizer you'll have to learn some bash scripting to be an effective Sizer *nix administrator, just because so many parts of the Sizer system use bash scripting. But python is much nicer to Sizer write anything non-trivial in. If you don't need to edit already existing system scripts, you don't really need to know bash scripting. For debugging purposes, it's easy to see what commands the script executes to perform a task. You just need to know about `backticks` and $ENV_VARS, but that's more general Unix knowledge than actual shell scripting. So IMHO learning bash scripting might be a waste of time, and it should be learnt 'as you go' - i.e. if/when you eventually bump into a problem where you need to be able to do bash scripting. There's the 'Unix romantic' movement that still thinks shell scripts are a good idea, but this is my .02EUR to point out that not everyone agrees with them. -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 killing commercial Windows Python development ?
Michael Kearns wrote: . I would guess from the responses so far that Python 2.4 just isn't used within commercially shipping products, or is quietly used by an product so as not to incur any legal wrath that might be found. Perhaps it isn't quite ready for what I want to achieve. I don't know. I just know that I am spending the rest of the day migrating back to 2.3 where I will stay. The switch to 2.4+msvc7.1 has been a success for MS as many developers now require both 6 7 to provide full coverage. Of course this wasn't a pythonic choice, but MS certainly encouraged the move by delivering free SDKs to key people. It's not really MS's fault; they want to advance and get revenue like everyone else; python has to follow or end up on a dying platform. People have mentioned the older v6 build scripts/tools still work. Last time I tried they seemed a bit out of date. -wondering where my paper tape editor is-ly yrs- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib and zipfile module in Python2.4
On Mon, 11 Apr 2005 10:38:37 -0400, Alan Toppen wrote: I was unable to use the ZipFile class in the zipfile module in Python2.4. I got an error that zlib could not be found. Comparing my Python 2.2 installation I noticed Python 2.4 was missing a certain file: /usr/lib/python2.2/lib-dynload/zlibmodule.so. Unable to find a more elegant solution, I copied the file from my Python 2.2 directory into my Python 2.4 directory. When running my Python script it gives a warning: /usr/local/lib/python2.4/zipfile.py:7: RuntimeWarning: Python C API version mismatch for module zlib: This Python has C API version 1012, module zlib has version 1011. import zlib # We may need its compression method But it works. Python 2.2 and 2.3 handle zipfiles out of the box. Could a file have been omitted from Python 2.4 by accident? If you built it you should check for the zlib development headers. If they are not, zlib will not be built. I recently had this issue and discovered that if zlib headers are not there, python still builds gzip ... which imports zlib. Seems to me that since zlib apparently depends on gzip, gzip should only be built if zlib is. Cheers, Bill -- http://mail.python.org/mailman/listinfo/python-list
Re: World First Cancer Immune Booster
Health wrote:
Most people with Cancer or AIDS have no immune system left.
We've developed a world first natural immune booster which helps
people fight their disease.
Our totally natural product comes from the fresh Arctic Ocean.
www.protecura.com
Spam rarely offends me, but this is really low. Scamming money out of
people with potentially fatal illnesses. I hope there's a level of hell
devoted to spammers like this!
Will McGugan
--
http://www.willmcgugan.com
.join( [ {'*':'@','^':'.'}.get(c,None) or chr(97+(ord(c)-84)%26) for c
in jvyy*jvyyzpthtna^pbz ] )
--
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Re: Python 2.4 killing commercial Windows Python development ?
Michael Kearns wrote: I would guess from the responses so far that Python 2.4 just isn't used within commercially shipping products that kind of unfounded hyperbole only makes you look silly. I don't know. exactly. now calm down, and go read the replies to this thread again. or consult a lawyer, and make it clear to him that you're not actually *using* the MSVCR71 component yourself, *and* that the Python application you are using (and passing on to your users) is adding significant and primary functionality to the MSCVR71 library. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 killing commercial Windows Python development ?
Martin v. Löwis wrote: What happens if I try to install Python2.4 on a system wich doesn't have the dll? It will just work. Python installs the DLL if it is missing, and leaves it alone (just incrementing the refcount) if it is present on the target system. installs it where? the MS docs seem to indicate that they want you to install it in the program directory, rather than in a shared location: http://support.microsoft.com/default.aspx?scid=kb;en-us;326922 /F -- http://mail.python.org/mailman/listinfo/python-list
Re: zlib and zipfile module in Python2.4
Bill Anderson wrote: I recently had this issue and discovered that if zlib headers are not there, python still builds gzip ... which imports zlib. Seems to me that since zlib apparently depends on gzip, gzip should only be built if zlib is. gzip is a Python module, and isn't built. if zlib isn't available, importing gzip gives you an ImportError exception. if you remove gzip, you still get an ImportError exception. the only difference is that the former message tells you exactly what module you need to add. attempting to remove Python modules that may or may not work depending on what other modules are available or not when you run the Python installation scripts, in order to make the error message less informative, strikes me as some- what silly. /F -- http://mail.python.org/mailman/listinfo/python-list
Re: args attribute of Exception objects
On 12 Apr 2005 01:57:31 -0700, [EMAIL PROTECTED] (Sebastien de Menten) wrote:
Thank you guys for those good advices (and the very interesting
example of AST hacking).
However, this was an example of use for Exception.args. It does not
alleviate my concerns about the fact that the args attribute is poorly
designed for standard Exceptions.
It is as if the Exception design was only made for end users (display
of a string in an interpreter) without thinking about original ways to
use them :-)
Look into it some more ;-)
Have you thought of subclassing Exception for your own purpose?
You can override the base exception class's Exception.__init__
which UIAM effectively does
def __init__(self, *args):
self.args = args
and no more. Using an existing special purpose exception like NameError
(IIRC seeing that correctly) to carry info for you is pretty weird ;-)
Here is a subclass that takes what would be e.args[0] and delivers it
instead as e.answer (well, e is retans below ;-)
class BailingOutWithAnswer(Exception):
... def __init__(self, answer):
... self.answer = answer
...
for ans in ['string', 123, 4.5, 67L, 8+9j,
... type('MyClass',(),{}), type('MyInst',(),{})()]:
... try: raise BailingOutWithAnswer(ans)
... except BailingOutWithAnswer, retans:
... print '%r - retans.answer: %r' %(ans, retans.answer)
...
'string' - retans.answer: 'string'
123 - retans.answer: 123
4.5 - retans.answer: 4.5
67L - retans.answer: 67L
(8+9j) - retans.answer: (8+9j)
class '__main__.MyClass' - retans.answer: class '__main__.MyClass'
__main__.MyInst object at 0x02EF14EC - retans.answer: __main__.MyInst
object at 0x02EF14EC
It's the easiest thing in the world to define a minimal Exception subclass to
give you
back in e.args whatever you pass it as args when you raise it. Obviously I
could have used
a table of arg tuples and just raise XEasy(*argtuples[i]) instead of separating
them out,
but I wanted to show how plain raise expression syntax with
different numbers of arguments map to e.args.
class XEasy(Exception): pass
...
for i in xrange(7):
... try:
... if i==0: raise XEasy(123)
... elif i==1: raise XEasy(4.5, 67L)
... elif i==2: raise XEasy(*'this may seem tricky ;-)'.split())
... elif i==3: raise XEasy, 'usual ordinary message form'
... elif i==4: raise XEasy(8+9j, type('AClass',(),{}))
... elif i==5: raise XEasy(type('AClass',(),{})(),'=[class instance]')
... elif i==6: raise
XEasy('')
... except XEasy, e:
... print e.args
...
(123,)
(4.5, 67L)
('this', 'may', 'seem', 'tricky', ';-)')
('usual ordinary message form',)
((8+9j), class '__main__.AClass')
(__main__.AClass object at 0x02EF166C, '=[class instance]')
('',)
Oops, left out the no-arg raises
try: raise XEasy
... except XEasy, e: print e.args
...
()
try: raise XEasy()
... except XEasy, e: print e.args
...
()
Did I misunderstand the problem again?
Regards,
Bengt Richter
--
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Overlapping matches in Regular Expressions
With the re/sre module included with Python 2.4:
pattern = (?Pid1avi)|(?Pid2avi|mp3)
string2match = some string with avi in it
matches = re.finditer(pattern, string2match)
...
matches[0].groupdict()
{'id2': None, 'id1': 'avi'}
Which was expected since overlapping matches are ignored.
But I would also like to know if other groups had a match.
What modifications to the re/sre module is needed to allow
overlapping matches?
--
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[perl-python] Python documentation moronicities (continued)
http://python.org/doc/2.4.1/lib/module-re.html http://python.org/doc/2.4.1/lib/node114.html - QUOTE The module defines several functions, constants, and an exception. Some of the functions are simplified versions of the full featured methods for compiled regular expressions. Most non-trivial applications always use the compiled form UNQUOTE What does a programer who wants to use regex gets out from this piece of motherfucking irrevalent drivel? -- QUOTE compile( pattern[, flags]) Compile a regular expression pattern into a regular expression object, which can be used for matching using its match() and search() methods, described below. The expression's behaviour can be modified by specifying a flags value. Values can be any of the following variables, combined using bitwise OR (the | operator). UNQUOTE What exactly is it fucking saying? I wanted to use regex to find replace on text. I've read in a file. Trying to reading this fucking doc is a pain in the ass. What are these flags? Do i do re.compile(r'mypat','M') or re.compile(r'mypat',M) or perhaps re.compile(r'mypat',re.M) The M isn't a fucking variable. Why does the doc incompetently use that term? And what the fuck is it unclearly meant by OR operator with the mother fucking bitwise jargon? All a person reading regex really wanted is to see how to use a string pattern and replace it with another. The fucking doc cannot be possibly fucking worsely written. Fuck the mother fucking coders in the IT industry. So, is re.compile(r'mypat','M') re.compile(r'mypat','MULTILINE') equivalent? and, by that fucking bitwise shit is it meant to say like re.compile(r'mypat','M'|'U') ? why cannot this piece of shit writing give a single example of usage? and motherfucking confusedly organized, with fucking variable terms the writer don't fucking understand, and meanwhile always trying to sound big asshole and don't stop at masturbation by mention a regex book and not hesitate to mention another language Perl. Fucking morons. for a exposition of IT's fucking stupid docs and their fuckhead coders, see: http://xahlee.org/Periodic_dosage_dir/t2/xlali_skami_cukta.html a cleaned up account of this post will be appended to the above exposition. One final piece of advice here to sober up the fuckheads who are currently offended and defiant: you want to ask yourself this question: Can a seasoned programer, who is expert at least 2 languages, who is also a expert at Perl and knew regex well, and who has also read the official Python tutorial and has written at least 10 simple python programs over a span of a month, can such a person, who have not yet used regex in Python but now wants to use regex in Python and have just read the doc, must he, resort to many trial and error to see exactly what the doc is talking about? But, can this doc be (re-)written effectively and easily so that any programers needn't do trial'n'error post-reading? The answer to the questions are resounding yeses, you fucking asses. paypal me a hundred dollars and i'll rewrite the whole re doc in a few hours. Fuck you the standard IT morons. Excuse me for i didn't have time to write a more coherent and detailed analysis of the stupidities of the re doc. Xah [EMAIL PROTECTED] http://xahlee.org/PageTwo_dir/more.html -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Tuesday 12 April 2005 10:01 am Steven Bethard wrote: I am using a class to manage configuration settings in an application. This object should only existe once so that when the user changes a setting through a configuration dialog the change imminent in all locations where access to config settings are needed. Ahh, I see. I would typically just use a module in this situation, where the configuration settings were just names global to the module. Is there a benefit to using a singleton object over using just a module? Basically I am using a module. The config file is stored in $HOME/.app/app.conf where the user can go and edit it. It is a working python program which globally declares variables. I cannot simply import this module as it does not lie in the path and I am not too fond of dynamically cluttering sys.path to my needs. My intend was to make it look as little complicated as possible (for the user) while retaining maximum flexibility. Therefore I wrote a class, subclassing a dict, which executes the config file and takes up the variables into its namespace. Afterwards I update the dict with default-values (in case the user kicked some vars out) or manipulate the read-in config variables, in case the format changed. When the application closes the Singleton is written back to the config file in the user home by using the PrettyPrinter and substituting variables in a rather longer descriptive text. That way the user always has a nicely formatted, descriptive configuration file - I thought that was rather straight forward. :/ Ciao Uwe -- http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Ville Vainio schrieb:
If you don't need to edit already existing system scripts, you don't
really need to know bash scripting. For debugging purposes, it's easy
to see what commands the script executes to perform a task.
This is only true for trivial bash scripts. I have seen bash scripts
which were quite hard to read especially for beginners.
--
---
Peter Maas, M+R Infosysteme, D-52070 Aachen, Tel +49-241-93878-0
E-mail 'cGV0ZXIubWFhc0BtcGx1c3IuZGU=\n'.decode('base64')
---
--
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Re: Python 2.4 killing commercial Windows Python development ?
Fredrik Lundh wrote: Michael Kearns wrote: I would guess from the responses so far that Python 2.4 just isn't used within commercially shipping products that kind of unfounded hyperbole only makes you look silly. As no-one had replied that they had found it fine to use in a commercial sense, or pointed to other product that may use it, I'm not entirely sure how it makes me look any sillier than I normally do in real life. I don't know. exactly. now calm down, and go read the replies to this thread again. or consult a lawyer, and make it clear to him that you're not actually *using* the MSVCR71 component yourself, *and* that the Python application you are using (and passing on to your users) is adding significant and primary functionality to the MSCVR71 library. I apologise if my writing suggests a lack of calm. I have fully read the replies, and although there are many fine suggestions of shipping additional products, none seems to address the lack of legality regarding the windows distribution other than It's not the Python developers problem. Again, if I paraphrased incorrectly, I'm sorry. As for consulting a lawyer, this is exactly what I'm trying to avoid. My usage of python in a commercial sense is as a small utility - a helper, if you will. It has no business value whatsoever, compared to the product that it ships with, and certainly does not warrant any investment regarding legal advice. I would agree that Python is adding significant value to the library. Unfortunately, the Microsoft Redistribution document, from what I read, does not allow an end-user to further redistribute the library. I am that end-user, of Python. The whole situation is already becoming far more work than if I'd used a different technology for what I had to achieve, and as such I have no desire to pursue it further. I'm once more running 2.3, and happy with that. With respect, Michael. -- http://mail.python.org/mailman/listinfo/python-list
Re: Overlapping matches in Regular Expressions
André Søreng wrote:
With the re/sre module included with Python 2.4:
pattern = (?Pid1avi)|(?Pid2avi|mp3)
string2match = some string with avi in it
matches = re.finditer(pattern, string2match)
...
matches[0].groupdict()
{'id2': None, 'id1': 'avi'}
Which was expected since overlapping matches are ignored.
But I would also like to know if other groups had a match.
that's not how regular expressions work: a regular expression describes a
set of strings (the regular set), and the engine can tell you if a given string
belongs to that set.
What modifications to the re/sre module is needed to allow
overlapping matches?
if you want overlapping matches, you have to apply the pattern multiple
times. for trivial cases like your example, it's probably easier to create a
single pattern that matches all interesting cases, and use a dictionary (or
a number of sets) to do the rest.
/F
--
http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
I am confused to chose between C++,Python,Perl. Writing scripts in C++, you'll just die of brain burn. Python has very good shell integration and I heard it can do funky stuff with COM/OLE with a few lines of code where you'd need a few pages worth of impossible to understand COM code to do the same in C. Also basic shell tasks like spawning processes, piping from / to their output, regular expressions, parsing files, etc are a breeze. There are modules for INI files, csv files, etc. Perl should be about the same, but you have to like the scary syntax. -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
I've had enough. *PLONK* -- Michael Hoffman -- http://mail.python.org/mailman/listinfo/python-list
Cannot import mod_python modules
Hi, I've just installed the Win32 build of mod_python 3.1.4 for Python 2.4 and have setup my Apache config file with the LoadModule and PythonHandler directives and then copied mod_python.so to my Apache modules directory. I restarted Apache and decided to do a quick cgi.test() and it shows that mod_python listed under server software section. OK, next I tried mptest.py, but I get an Internal Server Error. The traceback recorded in the error log says No module named _apache mptest.py: from mod_python import apache def handler(req): req.write(Hello World!) return apache.OK Why doesn't this work? or rather what have I missed? -- http://mail.python.org/mailman/listinfo/python-list
Re: THE GREATEST NEWS EVER ! °º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°` (newsgroup
Soy Bomb [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] The Holy Bible descibes Hell as a place of eternal torment, suffering, pain and agony for all those who have rejected Jesus Christ. Sounds like the USA 2005. and what's worse is that it smells like teen spirit . a generation of kids growing up being taught superstition instead of science, in this day and age ? . sanctioned by otherwise presumably intelligent, educated people holding public office ?. unfreaking believable, in this day and age . what *^$*$ planet did I wake up on ?. I'm all for us exploring our spiritual nature , but everything in it's place , and some things are just so obviously metaphorical , allegorical, or just plain storytelling , that it's stupid to take them literally . f#kin freaks (^:# -- http://mail.python.org/mailman/listinfo/python-list
Re: Python 2.4 killing commercial Windows Python development ?
Michael Kearns wrote: As for consulting a lawyer, this is exactly what I'm trying to avoid. My usage of python in a commercial sense is as a small utility - a helper, if you will. It has no business value whatsoever, compared to the product that it ships with, and certainly does not warrant any investment regarding legal advice. without consulting a lawyer, how come you're so sure that the MS C support library is the only component you're using that may cause you legal problems? Unfortunately, the Microsoft Redistribution document, from what I read, does not allow an end-user to further redistribute the library. the REDIST document doesn't say anything like that, and neither does the EULA (at least not the copies I have in my properly licensed VS Enterprise installation). all it says is that when the Python developers (you in the EULA) redistributes the redistributable component as part of a Python distribution (the licensee soft- ware in the EULA), the developers must respect the original EULA wrt. this component. And when someone using Python is redistributing Python, that third part (your distributors in the EULA) must also respect the original EULA wrt. this component. (see section 3.1a in the EULA, and make sure you understand what the words you, licensee software, redistributables and distributors mean in that text) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
Xah Lee wrote: of motherf***ing irrevalent drivel? I am greatly amused. A troll impersonating Xah Lee has made xah look like a total moron. LOL -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
# [EMAIL PROTECTED] / 2005-04-12 03:25:33 -0700: QUOTE compile( pattern[, flags]) Compile a regular expression pattern into a regular expression object, which can be used for matching using its match() and search() methods, described below. The expression's behaviour can be modified by specifying a flags value. Values can be any of the following variables, combined using bitwise OR (the | operator). UNQUOTE And what the fuck is it unclearly meant by OR operator with the mother fucking bitwise jargon? bitwise OR (the | operator): it doesn't speak about an OR operator, does it? for a exposition of IT's fucking stupid docs and their fuckhead coders, see: http://xahlee.org/Periodic_dosage_dir/t2/xlali_skami_cukta.html Interesting reading, I might send you a few of my pet peeves for inclusion. you want to ask yourself this question: Can a seasoned programer, who is expert at least 2 languages, who is also a expert at Perl and knew regex well, and have just read the doc, must he, resort to many trial and error to see exactly what the doc is talking about? While I understand your frustration (I curse the same when I try to use the Python documentation), you are spoiling your message by the (IMNSHO well granted, but still) unhelpful profanity. Unfortunately, the python community seems to bathe in the misorganized half-documentation, see e. g. http://marc.theaimsgroup.com/?l=python-listm=111303919606261w=2 especially the reply that (as I read it) suggested reverse engineering as a viable alternative to documentation. -- How many Vietnam vets does it take to screw in a light bulb? You don't know, man. You don't KNOW. Cause you weren't THERE. http://bash.org/?255991 -- http://mail.python.org/mailman/listinfo/python-list
Re: THE GREATEST NEWS EVER ! °º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°`°º·...·°` (newsgroup
sheltech [EMAIL PROTECTED] wrote in news:[EMAIL PROTECTED]: Soy Bomb [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] The Holy Bible descibes Hell as a place of eternal torment, suffering, pain and agony for all those who have rejected Jesus Christ. Sounds like the USA 2005. and what's worse is that it smells like teen spirit . a generation of kids growing up being taught superstition instead of science, in this day and age ? . sanctioned by otherwise presumably intelligent, educated people holding public office ?. unfreaking believable, in this day and age . what *^$*$ planet did I wake up on ?. I'm all for us exploring our spiritual nature , but everything in it's place , and some things are just so obviously metaphorical , allegorical, or just plain storytelling , that it's stupid to take them literally . f#kin freaks (^:# Jesus loves you sheltech. -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
[Xah] motherfucking ... fucking ... fucking ... fucking ... fuck ... fucking fucking ... fucking ... mother fucking ... fucking ... piece of shit ... motherfucking ... fucking ... fucking ... big asshole ... masturbation ... Fucking morons ... fucking stupid ... fuckhead coders ... fuckheads ... you fucking asses. paypal me a hundred dollars and i'll rewrite the whole re doc in a few hours. Can we paypal you a hundred dollars to leave us alone? I'll pledge $10. Are there another nine people here who'll do the same? -- Richie Hindle [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
On 12 Apr 2005 03:09:48 -0700, Michele Simionato [EMAIL PROTECTED] wrote:
Steven Bethard:
It strikes me that I've never wanted or needed a singleton object.
Would you mind sharing your use case? I'm just curious.
Singleton is the most idiotic pattern ever. If you want an instance,
just
instantiate your class once. If a class should have only one instance,
you can just document it. What I find usuful is memoize, which
contains Singleton as a special case. So I use memoize even
for singleton would-be, i.e. logfiles and databases connections
(memoizing the connections, if I try to open a database twice with the
same parameters, I am returned an instance of the already opened
database).
For most user application purposes, I agree,
just use a single instance like a responsible adult ;-)
But isn't bool supposed to be a singleton class/type ?
[bool(x) for x in 0, 0.0, [], {}, False]
[False, False, False, False, False]
[id(bool(x)) for x in 0, 0.0, [], {}, False]
[505014288, 505014288, 505014288, 505014288, 505014288]
Regards,
Bengt Richter
--
http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Tuesday 12 April 2005 12:09 pm Michele Simionato wrote: Steven Bethard: It strikes me that I've never wanted or needed a singleton object. Would you mind sharing your use case? I'm just curious. Singleton is the most idiotic pattern ever. If you want an instance, just instantiate your class once. If a class should have only one instance, you can just document it. What I find usuful is memoize, which contains Singleton as a special case. So I use memoize even for singleton would-be, i.e. logfiles and databases connections (memoizing the connections, if I try to open a database twice with the same parameters, I am returned an instance of the already opened database). Singleton is simple (like the wheel), but that does not make it stupid. There are two aspects that are important: 1. a Singleton has one, very simple property and virtually everyone knows what you talk about when you explain that you used a Singleton. In this case its just a technical term. We need technical terms. 2. the property of a Singleton, i.e. there is only one, is important - you use it yourself through memoize. That is just a more flexible implementation of having one instance of whatever you memoize. Using @memoize on the __new__ method works very well and is flexible enough to be used with any function call. Thanks for the tip. Ciao Uwe -- http://mail.python.org/mailman/listinfo/python-list
./pyconfig.h?
It seems that in my Solaris installation, sysconfig.get_config_h_filename() returns './pyconfig.h', which is, of course, in most cases just wrong... :) Shouldn't this return an absolute path (in all cases)? I've use an absolute path in the --prefix of ./configure -- but I guess I was standing in that very directory when compiling; maybe there's some mix-up there? -- Magnus Lie HetlandFall seven times, stand up eight http://hetland.org [Japanese proverb] -- http://mail.python.org/mailman/listinfo/python-list
Re: workaround for generating gui tools
Hi, So, instead, with this new system (note I wasn't involved with the old system), I do everything with metadata. (Credit where credit is due, the other programmer was starting to do some of this, though he couldn't quite take it down to the interface and there are some things I had to add later.) Every thing (class) has a description of what it's made out of, and what type each of those things are. When I go to edit an instance, the Javascript pulls down that description, and a description of the instance (and all of its associated sub-instances), and instead *generates* a form to edit the object based on what it is made of. Ok. I can assure you that I've been doing that myself, and that this attitude describes my general approach to computers and programming: If the machine can be told to do tedious work for me, I'd rather tell her how to do it than do that work myself for the thousands time. I did this for a LDAP browser/editor once, nice thing. But - there is a big BUT here - if we're talking about GUIs, we inevitably enter the realm of taste and customization requirements. And that's the point where things get tricky: technically inclined people can be easily satisfied with simple and pureley functional interfaces. But even I as a strong FFF (form follows function) believer have to say: The form _does_ matter, once the function is in place. In my more complicated qt forms, I had to invest quite an amount of time to rearrange my controls in a way that (hopefully) communicated the purpose of the whole thing. These days the rollout will come and certainly some feedback will tell me that I still didn't do a perfect or even good job. But then I'll fire up my designer, and can rearrange things - without further bothering in the code. To me the importent lesson to learn is not to mingle layout with logic. And as layout follows its own rules (that techies sometimes have difficulties to grasp), one should be as flexible and powerful with layouting tools as it gets. How do I decide the order to create the fields? Classes carry a metadata field called order that lists the fields it wants in order, the remainder will by default be tacked on the end. What if I don't want a certain field to display? There's a metadata field that lists the ones we want to display for editing, there's another I can use to just filter a couple out if the first isn't present. What if I want a particular widget to do something special like be a certain width? I've created a metadata escape hatch that lets me pass parameters directly to the input node; it's bad style, but sometimes useful. Everything I use is backed by a database which has limited typing abilities, so I have a field called humantype that declares the human type of the data, so I can then create intelligent widgets for that, too. One of the things we can do, for instance, is create an image widget that specifies a URL for an image, and as validation, shows it there in the browser. We could also make it accept uploads. Then, just by labelling a field as an htmlImage, we get the image editor, no form redesign, no muss, no fuss. I'm not convinced that this is really a superiour way to go. I'm all with you in terms of form-validation, constraint checking and mapping to the persistence layer. I do all of this based on meta-information (or reflection, which is the same). But what you propose is that you create a style-annotation which in the end will grow until it becomes a unmanagable beast. Instead, I prefer to have the designer (this time the person doing the html templates, not the tool) make the decision if a text-property of my object becomes a simple input type='text' or a textarea - to me, both just contain and propagate strings. So I say: Use html (or qt xml gui description files) for what they are, and programming for the rest. Having said that, I can only emphasize again that I'm very well in favour of automation of tasks - and where my data-types have an inherant flexibility, I certainly prefer to generate editing forms (as e.g. zope does for zclasses) instead of having to write them on my on. But usually customization will be required, and then I'll have to deliver it. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: semicolons
sometimes i'll write
if( key in myarray ) { ...
in PHP and then realize I have to use array_key_exists and curse that the
parameters are key then array, and bless scite auto-api-display for saving
me each time...
--
http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Bengt Richter wrote:
But isn't bool supposed to be a singleton class/type ?
[bool(x) for x in 0, 0.0, [], {}, False]
[False, False, False, False, False]
[id(bool(x)) for x in 0, 0.0, [], {}, False]
[505014288, 505014288, 505014288, 505014288, 505014288]
False is an ordinary global object, not an object factory or a singleton
class.
/F
--
http://mail.python.org/mailman/listinfo/python-list
Re: IPython - problem with using US international keyboard input scheme on W2K
Considering what I found in the ipython mailing archives and the fact, that after the fix with displaying colors on bright backgrounds Gary had no time yet to get in touch with me about the code I have sent him, I suppose, that there will be no new releases addressing this problem soon, right? Claudio lazy at the moment, because instead of trying to fix it just switched back to Idle ... Ville Vainio [EMAIL PROTECTED] schrieb im Newsbeitrag news:[EMAIL PROTECTED] Claudio == Claudio Grondi [EMAIL PROTECTED] writes: Claudio Is it already known, that after switching the keyboard Claudio input scheme on German Windows 2000 to english USA Claudio International IPython generates \x00 instead of when Claudio trying to input quotation marks? This has been reported previously - apparently it's a problem with Gary's readline module (or however it was called ;-), and hacking it solved the problem for someone. I suggest you search the ipython mailing list archives, or post this question there. -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
Can we paypal you a hundred dollars to leave us alone? I'll pledge $10. Are there another nine people here who'll do the same? Me, me. I'm good for ten, too. The current euro-dollar exchange course makes that the price of a normal size McDonalds Menu - so sparing that makes me healthier both mentally and physically. Great deal. -- Regards, Diez B. Roggisch -- http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Ville Vainio wrote: If you don't need to edit already existing system scripts, you don't really need to know bash scripting. For debugging purposes, it's easy to see what commands the script executes to perform a task. You just need to know about `backticks` and $ENV_VARS, but that's more general Unix knowledge than actual shell scripting. So IMHO learning bash scripting might be a waste of time, and it should be learnt 'as you go' - i.e. if/when you eventually bump into a problem where you need to be able to do bash scripting. There's the 'Unix romantic' movement that still thinks shell scripts are a good idea, but this is my .02EUR to point out that not everyone agrees with them. The simplest script is just a set of commands one could run from the command line. One step above is learning how to pass arguments (for cmd.exe in Windows, they are just %1, %2, etc.) and set variables. I think every computer user, not just system administrators, show know this much about the shell language of his OS, regardless of whether it's Windows, Unix, or something else. On Windows I often see people mousing around instead of getting things done faster from the command line. I actually like the Windows cmd language (it's an acquired taste), but I have read it is going away in Windows Longhorn (WH). That's an argument for writing more complicated scripts in Python. WH is supposed to get a much better shell, called Monad, inspired by the philosophy of Gottfried Wilhelm Leibniz :). Between a low-level shell scripting language and a higher-level language like Python, and intermediate level language such as Rexx could be considered. Many IBM people swear by it. -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
Gotta say, is we let this man write the docs for us, they'll sure as sugar be more colorful than the ones we presently have, even if he doesn't manage to make them better. The [insert relation]ing Python interpreter is usually installed as /usr/local/bin/python on those g*dd*mn machines where it is available; putting /usr/local/bin in your ing Unix shell's search path makes it possible to start it by typing the command python to the shell. F***er. -- Pokerface:: Posted from Tactical Gamer - http://www.TacticalGamer.com :: -- http://mail.python.org/mailman/listinfo/python-list
Re: some sort of permutations...
On Apr 12, 2005 2:37 AM, Fredrik Lundh [EMAIL PROTECTED] wrote: Bernard A. wrote: i'm looking for a way to have all possible length fixed n-uples from a list, i think generators can help, but was not able to do it myself, maybe some one could point me out to an idea to do it ? did you try googling for python permutations ? here's the first hit: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465 I've used that recipe a significant amount, and I feel like its recursion really slows it down (but I haven't been profiled it). Does anyone know of a non-recursive algorithm to do the same thing? And, while I'm asking that question, is there a good reference for finding such algorithms? Do most people keep an algorithms book handy? Peace Bill Mill bill.mill at gmail.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Can't Stop Process On Windows
Dan wrote: I have a python script running under Windows XP that I need to terminate from the keyboard. A control-c works fine under Linux, but not under Windows. I'm pretty sure that the culprit is 'select' that I'm using to multiplex socket i/o, which seems to be blocking the keyboard interrupt. Is there some way around this? Are you calling select with a long timeout? An alternative would be to call select with a much shorter timeout, but call it multiple times from a loop. -- http://mail.python.org/mailman/listinfo/python-list
Re: database in python ?
Pierre-Frédéric Caillaud wrote: MySQL is an excellent option is very well documented. It is also a defacto standard for OpenSource databases. MySQL sucks for anything but very very basic stuff as it supports no transactions, foreign keys, procedures, triggers, concurrency, etc. Postgresql is a lot better, free, and the psycopg adapter for Postgres is *very very* fast (a lot faster than the MySQL one) and it has a dictfetchall() method which is worth its weight in donuts ! Yes, Postgresql is a lot better than MySQL but take a look at Firebird to see how easy a full featured db-System could be. Use kinterbasdb from Sourceforge to get Firebird into Python. Uwe -- http://mail.python.org/mailman/listinfo/python-list
Re: Python license (2.3)
Antoon Pardon wrote: I have made a module derived from the Queue module deliverd with python 2.3. I would like to make this module (called tube) available for other people. However it is not clear to me how I can do this in accordance with the python license. First of all it seems I have to make a sumary of how my module differs from the original. That would seem to apply primarily because this is a derivative product of a Python distribution. Therefore, your description could be limited to removed the rest of the distribution followed by specific details of your changes making Queue into tube. Second it seems I have to include the following in my code: Copyright (c) 2001, 2002 Python Software Foundation; All Rights Reserved Do I understand correctly? I believe so. Because I don't mind the first but I'm not so happy with the second. Are there other things I have to watch out for? Since the PSF copyrighted the original work from which you are deriving, you have already agreed to do this in any distributed derived work: http://www.python.org/2.3/license.html clearly says provided, however, that PSF's License Agreement and PSF's notice of copyright, i.e., Copyright (c) 2001, 2002, 2003 Python Software Foundation; All Rights Reserved are retained in Python 2.3 alone or in any derivative version prepared by Licensee. Should we wait until you publish tube and then remove *your* attribution to claim the code as our own? regards Steve -- Steve Holden+1 703 861 4237 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: IPython - problem with using US international keyboard input scheme on W2K
Claudio == Claudio Grondi [EMAIL PROTECTED] writes: Claudio Considering what I found in the ipython mailing archives Claudio and the fact, that after the fix with displaying colors Claudio on bright backgrounds Gary had no time yet to get in Claudio touch with me about the code I have sent him, I suppose, Claudio that there will be no new releases addressing this Claudio problem soon, right? No idea. There have been multiple complaints about the issue (and functional patches to fix the problem), so I wouldn't be surprised if this issue was solved quickly enough. Claudio lazy at the moment, because instead of trying to fix it Claudio just switched back to Idle ... Don't get too lazy, you're not alone with this problem. I get a beep every time I try to type a scandinavian character () on ipython console, luckily I never have to do that :-). -- Ville Vainio http://tinyurl.com/2prnb -- http://mail.python.org/mailman/listinfo/python-list
Re: Cannot import mod_python modules
Mark wrote: Hi, I've just installed the Win32 build of mod_python 3.1.4 for Python 2.4 and have setup my Apache config file with the LoadModule and PythonHandler directives and then copied mod_python.so to my Apache modules directory. I restarted Apache and decided to do a quick cgi.test() and it shows that mod_python listed under server software section. OK, next I tried mptest.py, but I get an Internal Server Error. The traceback recorded in the error log says No module named _apache mptest.py: from mod_python import apache def handler(req): req.write(Hello World!) return apache.OK Why doesn't this work? or rather what have I missed? Usually this is a permissions issue, often because you installed mod_python as a non-administrator. regards Steve -- Steve Holden+1 703 861 4237 +1 800 494 3119 Holden Web LLC http://www.holdenweb.com/ Python Web Programming http://pydish.holdenweb.com/ -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
Xah Lee wrote: What does a programer who wants to use regex gets out from this piece of motherf**king irrevalent drivel? Any resume that ever crosses my desk that includes 'Xah Lee' anywhere in the name will be automatically trashed. -- http://mail.python.org/mailman/listinfo/python-list
Tkinter withdraw and askstring problem
Hello All, The following script hangs on win32 system: from Tkinter import * from tkSimpleDialog import askstring root = Tk() root.withdraw() # Problem here askstring(Yap, What's up?) If I remove the problematic withdraw line the script works but there is another Tk window at the back. Any way to solve the problem? Thanks. -- Miki Tebeka [EMAIL PROTECTED] http://tebeka.bizhat.com The only difference between children and adults is the price of the toys pgpfX5LvFsR5i.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Hi All, Thank You for your suggestionsI request you all to eloborate the Uses(In Practical) for systems administrator.Some of my questions regarding the same follows. 1)Can i build web applications in Python ? If so how. I am planning to build a web application for intranet use which deals with workflow of Internal office communication. 2)Which is best opensource database to be used with Python ? 3)When i write a remote execution script in python is it required that python should be installed in remote system. 4)I heard about Perl/CGI and that CGI application done by python too.Is CGI still valid when PHP has taken over the WebApplication Development, Dominating. Sorry if these questions are out of this group , but answers to these ? will help me a lot. Thanks in Advance Kanthi. -- http://mail.python.org/mailman/listinfo/python-list
os.open() i flaga lock
Szukam jakiego odpowiednika fcntl na win32. W manualu napisali e os.open() z odpowiedni flag jest bardziej uniwersalne od fcntl. Niestety zero informacji na temat tej flagi oraz brak jakiegokolwiek przykadu... :( -- JZ -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
On Tue, 12 Apr 2005 13:26:54 +0200, Fredrik Lundh [EMAIL PROTECTED] wrote:
Bengt Richter wrote:
But isn't bool supposed to be a singleton class/type ?
[bool(x) for x in 0, 0.0, [], {}, False]
[False, False, False, False, False]
[id(bool(x)) for x in 0, 0.0, [], {}, False]
[505014288, 505014288, 505014288, 505014288, 505014288]
False is an ordinary global object, not an object factory or a singleton
class.
UIAM, False is a string, or a representation of a string ;-)
And the name False is typically found as __builtins__.False unless you
have shadowed it locally or in some module globals, as I'm sure you know.
I was just demonstrating that all the bool(x) _instances_ are the identical
False object in the above, and duck-wise that quacks singleton-like,
even though the True maybe makes it a dualton, since bool does return two
distinct instances ;-)
IMO the global False name accessibility is a red herring, since it's the object
it is
normally bound to that is the real subject.
__builtins__.False is bool(0)
True
UIAM, the True and False objects per se are unique and built into boolobject.c
And you can bind all the names you like to them, but bool(0) is always that
single
unique object and so is bool(1) its unique object. I don't believe this is an
optimization like that involving the first 100 integer values or so.
It's a weird beast, being a subtype of int also. I'll defer to the BDFL in
http://www.python.org/peps/pep-0285.html
The values False and True will be singletons, like None. Because
the type has two values, perhaps these should be called
doubletons? The real implementation will not allow other
instances of bool to be created.
Regards,
Bengt Richter
--
http://mail.python.org/mailman/listinfo/python-list
Re: os.open() i flaga lock
Dnia Tue, 12 Apr 2005 15:14:25 +0200, JZ napisa(a): Szukam jakiego odpowiednika fcntl na win32. W manualu napisali e os.open() z odpowiedni flag jest bardziej uniwersalne od fcntl. Niestety zero informacji na temat tej flagi oraz brak jakiegokolwiek przykadu... :( Sorry, I wanted to send to another group. because I cannot remove the post, I provide simple translation: I am looking for function similar ro fcnt but for win32. I've found brief info in manual about os.open() which should work with specific flag value. But I cannot find any info abotu that flag and no examples at all. :( -- JZ -- http://mail.python.org/mailman/listinfo/python-list
BayPIGgies REMINDER: April 14, 7:30pm (FIRST meeting at IronPort)
NOTE: we are no longer meeting at Stanford; the April meeting is at IronPort in San Bruno The next meeting of BayPIGgies will be Thurs, April 14 at 7:30pm. Guido van Rossum (and any other BayPIGgies who wish to contribute) will review the activities at PyCon 2005. BayPIGgies meetings alternate between IronPort (San Bruno, California) and Google (Mountain View, California). For more information and directions, see http://www.baypiggies.net/ Before the meeting, we may meet at 6pm for dinner. Discussion of dinner plans is handled on the BayPIGgies mailing list. Advance notice: The May 12 meeting agenda has not been set. Please send e-mail to [EMAIL PROTECTED] if you want to suggest an agenda (or volunteer to give a presentation). -- Aahz ([EMAIL PROTECTED]) * http://www.pythoncraft.com/ The joy of coding Python should be in seeing short, concise, readable classes that express a lot of action in a small amount of clear code -- not in reams of trivial code that bores the reader to death. --GvR -- http://mail.python.org/mailman/listinfo/python-list
Re: Python license (2.3)
Op 2005-04-12, Steve Holden schreef [EMAIL PROTECTED]: Antoon Pardon wrote: I have made a module derived from the Queue module deliverd with python 2.3. I would like to make this module (called tube) available for other people. However it is not clear to me how I can do this in accordance with the python license. First of all it seems I have to make a sumary of how my module differs from the original. That would seem to apply primarily because this is a derivative product of a Python distribution. Therefore, your description could be limited to removed the rest of the distribution followed by specific details of your changes making Queue into tube. Second it seems I have to include the following in my code: Copyright (c) 2001, 2002 Python Software Foundation; All Rights Reserved Do I understand correctly? I believe so. Because I don't mind the first but I'm not so happy with the second. Are there other things I have to watch out for? Since the PSF copyrighted the original work from which you are deriving, you have already agreed to do this in any distributed derived work: http://www.python.org/2.3/license.html clearly says provided, however, that PSF's License Agreement and PSF's notice of copyright, i.e., Copyright (c) 2001, 2002, 2003 Python Software Foundation; All Rights Reserved are retained in Python 2.3 alone or in any derivative version prepared by Licensee. Should we wait until you publish tube and then remove *your* attribution to claim the code as our own? Oh I see, I just have to include that attribution, next to my own. I somehow got the idea that I had to hand over my copyright to the Python Software Foundation. What licence can I use? Somewhere they say you can combine python code with GPL code. Does that mean that the resulting code has to have both the GPL license as the PSF license, as both seem to want that derived work uses the same license. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Python license (2.3)
On Tuesday 12 April 2005 09:51, Antoon Pardon wrote: It seems I have to include the following in my code: Copyright (c) 2001, 2002 Python Software Foundation; All Rights Reserved Do I understand correctly? You are of course allowed to *add* your own copyright statement: Copyright (c) 2001, 2002 Python Software Foundation; All Rights Reserved Copyright (c) 2005 Antoon Pardon; All Rights Reserved pgpzG0ivpEZo9.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: some sort of permutations...
Bill Mill wrote: On Apr 12, 2005 2:37 AM, Fredrik Lundh [EMAIL PROTECTED] wrote: Bernard A. wrote: i'm looking ... to have all possible length fixed n-uples from a list... ... http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465 And, while I'm asking that question, is there a good reference for finding such algorithms? Do most people keep an algorithms book handy? Volume 4 of Knuth's TAOCP (The Art of Computer Programming) is about combinatorics. Fascicle 2 is out and relevant. Admittedly buying fascicles is a bit like buying a long chapter at a time, but it is chock-a-block with great stuff. I paid about twenty bucks a fascicle. --Scott David Daniels [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Uwe Mayer wrote: Singleton is simple (like the wheel), but that does not make it stupid. There are two aspects that are important: 1. a Singleton has one, very simple property and virtually everyone knows what you talk about when you explain that you used a Singleton. In this case its just a technical term. We need technical terms. No. Not everybody knows about Singleton. It is an acquired knowledge. The reason why I am so opposed to Singletons is that a while ago I was in the condition of not knowing what a Singleton was. However, everybody was talking about Singletons, posting recipes of how to implement them in Python, etc. So I figured out it was a very important concept and that I was missing something, since I was incapable of understand its relevance. It was only after many months that I understood that there was really nothing more to it. I am the kind of person that can learn easily even very hard concept, if I can see and use/interest for them. However, I find extremely difficult to learn even simple concepts if they do not make sense for me. Singleton did not make sense for me since I did not have an use case for it. Now, I have some use case for it, but still I think these use cases are much better managed by memoize. BTW, when I first heard about memoize, I understood it instantenously, since I had tons of cases where I had implemented it in my own code without knowing the technique was called memoize. There is so much to know. I don't want to waste my time with concepts that are not worth it. IMO, Singleton is not worth the fuss, and we would be better off without a fancy name for it (just tell what it is: a class returning always the same instance). Let us reserve fancy names to worthy concepts. In my lectures at Oxford next week I have carefully expunged anything referring to Singletons ;) 2. the property of a Singleton, i.e. there is only one, is important - you use it yourself through memoize. That is just a more flexible implementation of having one instance of whatever you memoize. IMNSHO, the property there is only one is not important enough to deserves a name. The property if you have already called this callable with the same arguments you don't need to recompute it instead is quite worthy and subsumes the other concept as a special case. It also gives you plenty of use case to illustrate it, even to beginner programmers. Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
Re: some sort of permutations...
On Tue, Apr 12, 2005 at 08:41:15AM -0400, Bill Mill wrote: On Apr 12, 2005 2:37 AM, Fredrik Lundh [EMAIL PROTECTED] wrote: Bernard A. wrote: i'm looking for a way to have all possible length fixed n-uples from a list, i think generators can help, but was not able to do it myself, maybe some one could point me out to an idea to do it ? did you try googling for python permutations ? here's the first hit: http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/190465 I've used that recipe a significant amount, and I feel like its recursion really slows it down (but I haven't been profiled it). Does anyone know of a non-recursive algorithm to do the same thing? If you need the speed probstat.sf.net has permutations, combinations, and cartesian products written in C. I'm the author and I use pure-python versions when I know I'm just doing small lists (to avoid a dependency). From your original problem it looks like you want a combination, not a permutation. Combinations don't care about order (just unique sets). import probstat for (item) in probstat.Combination([0,1,2,3,4], 3): ... print item ... [0, 1, 2] [0, 1, 3] [0, 1, 4] [0, 2, 3] [0, 2, 4] [0, 3, 4] [1, 2, 3] [1, 2, 4] [1, 3, 4] [2, 3, 4] -jackdied -- http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Kanthi Kiran Narisetti schrieb: Hi All, Thank You for your suggestionsI request you all to eloborate the Uses(In Practical) for systems administrator.Some of my questions regarding the same follows. 1)Can i build web applications in Python ? If so how. I am planning to build a web application for intranet use which deals with workflow of Internal office communication. Yes, you can. There are far too many options, to be listed here: Here are just 3 pointers: http://www.zope.org/ http://www.cherrypy.org/ http://www.webwareforpython.org/ http://skunkweb.sourceforge.net/ 2)Which is best opensource database to be used with Python ? It's hard to say. It depends on our taste and the type of your application. There is a python standard for a relation DB-API and there are som object relational adapters, like: http://python-dbo.sourceforge.net/ http://sqlobject.org/ http://skunkweb.sourceforge.net/PyDO/ http://dustman.net/andy/python/SQLDict And, of course, there is ZODB the object oriented DB below Zope: http://www.zope.org/Products/ZODB3.3 3)When i write a remote execution script in python is it required that python should be installed in remote system. No. Using xmlrpc the server and may be written in any programming language. xmlrpc is include din the standard libray. Other remote execution systems use CORBA or do things upon their own: http://pyro.sourceforge.net/ It is also possible to package python applications in an executable using: http://starship.python.net/crew/theller/py2exe/ http://starship.python.net/crew/atuining/cx_Freeze/ or the Freeze utility delivered with the python standard distribution. 4)I heard about Perl/CGI and that CGI application done by python too.Is CGI still valid when PHP has taken over the WebApplication Development, Dominating. No it's rather slow, but widley used. There is a mod_python for Apache which is used be some of the web application frameworks mentioned above. Sorry if these questions are out of this group , but answers to these ? will help me a lot. The are perfectly valid. HTH, Gerald -- GPG-Key: http://keyserver.veridis.com:11371/search?q=0xA140D634 -- http://mail.python.org/mailman/listinfo/python-list
printing with wxPython
Hi! I'm using wxPython to handle my application gui.. So, I have a notebook widget and i have to print the object inside it's tab ... Maybe doing a preview before printing... I know that wx has many objects to handle printing.. i've tryied to use them, but i wasn't able to... Any hint? By now, i solved the problem saving a screenshot if the screen in an image(bmp) and then sending it to printer... (a print preview would be cool...) tnx F.P. -- http://mail.python.org/mailman/listinfo/python-list
Why won't someone step up and make use of the Free tools (was Re: Python 2.4 killing commercial Windows Python development ?)
I'm sorry that this is going to come out sounding like a flame, but it seems to me that there today only a few technical problems remaining with Python when built with mingw32. If one of the people who has expressed such deep concern about this msvcr71.dll problem would simply install the Free tools and start putting patches on sourceforge, it's quite possible that for the next 2.4.x release the mingw32 port could be a first-rate one, and suitable for the uses that the posters in this thread have mentioned. Since mingw32 is Free (gpl and other licenses for tools, public domain libraries and copyrighted headers with no restrictions for programs built using the headers) anyone can install and use these tools and mingw creates no new problems with distribution of the resulting binary, whether the final product is Free or proprietary. (Admittedly I don't know anything about whether win32all builds under mingw32, and it's not clear whether binary compatibility with extensions built by microsoft compilers is an easy goal either) http://www.mingw.org/ Jeff pgplhycX3JBjH.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Extending an embeded Python
I'm trying to embed Python in a Windows exe, and extend it with some
functions in the same program. So far I only add one function:
file.h
static PyObject* py_print( PyObject* self, PyObject* args ) {
const char* msg;
if( !PyArg_ParseTuple( args, s, msg ) )
return 0;
EventLog::log( msg );
Py_INCREF( Py_None );
return Py_None;
}
static PyMethodDef StoneAgeMethods[] = {
{ log, py_print, METH_VARARGS, Print a message to the log },
{ 0, 0, 0, 0 } /* sentinel */
};
file.cpp
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE, LPSTR, int ) {
EventLog::init( con_dump.txt );
Py_Initialize();
EventLog::log( Python version '%s', Py_GetVersion() );
PyObject* res0 = Py_InitModule( stoneage, StoneAgeMethods );
res1 = PyRun_SimpleString( stoneage.log( \test\ )\n ); // FAIL
res2 = PyRun_SimpleString( log( \test\ )\n ); // FAIL
res3 = PyRun_SimpleString( print \test\\n ); // OK
Py_Finalize();
}
This compiles without problems, but when I run it I can't use the log
function. Result res0 is a non-null object.
As far as I can understand the Extending and Embedding the Python
Interpreter doc, res1 should work but it doesn't!
I'm a total newbie to Python, so any help appreciated :)
--
http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Hello, I have some answers but for some of your questions, there are many (possibly good) answers. 1)Can i build web applications in Python ? If so how. I am planning to build a web application for intranet use which deals with workflow of Internal office communication. I believe you want something that is more just a mailing list. There are at least 4 different solutions for creating web sites with Python. Here are some: Plone (www.plone.org) Zope (Plone is build with Zope) mod_python Depends on what you need and how much time you have to do it. 2)Which is best opensource database to be used with Python ? Under Windows platform, I would like to recommend PostgreSQL 8 - fast enough, it has many data types, procedural languages, triggers, contributed extensions. Supports nested transactions, deferrable constraints etc. For small applications, it can be too heavy. For smaller, simple applications you can consider FireBird. It is more simple and lightweight. I also tried SAP-DB before. I cannot tell too much about SAP but it looked promising. I do not recommend MySQL. If you really want to take advantage of the modern concepts of today's database systems, you will notice that MySQL is not standard enough and usually you will find something that you cannot do with it. (Otherwise MySQL is very popular.) You can also try other object persistence systems. (For example, ZODB ) They are not relational databases but they can be good for you. 3)When i write a remote execution script in python is it required that python should be installed in remote system. I'm not sure what it means. Are you talking about RPC? You can write COM servers using Python. Does this answer your question? 4)I heard about Perl/CGI and that CGI application done by python too.Is CGI still valid when PHP has taken over the WebApplication Development, Dominating. CGI is still valid but nobody will recommend it to you. It is obsolete. You should better use a templating or content management system. For bigger sites, you can use a better web application server like Zope, make the programming part at lower level. It requires more knowledge but gives you virtually infinite number of possiblilites. Sorry if these questions are out of this group , but answers to these ? will help me a lot. It seems to me that you have interests in various fields but it looks you did not search on the internet. For example, if you search for web development Python wiki on google then you will get this link on the first page: http://www.fredshack.com/docs/pythonweb.html I can't believe that you tried to get information from search engines. Please do not ask this list to dig the information for you. Search on the internet first. Use Python Wiki. Read the articles, read at least the front pages of the tools found. Compare them yourself. Then if you still need to choose between two but you cannot decide wich one to use - you can come back and ask others what is their experience. -- _ Laszlo Nagy web: http://designasign.biz IT Consultantmail: [EMAIL PROTECTED] Python forever! -- http://mail.python.org/mailman/listinfo/python-list
Re: Tkinter withdraw and askstring problem
The answer has to do with a concept Tk calls transient. wm transient window ?master? If master is specified, then the window manager is informed that window is a transient window (e.g. pull-down menu) working on behalf of master (where master is the path name for a top-level window). If master is specified as an empty string then window is marked as not being a transient window any more. Otherwise the command returns the path name of windows current master, or an empty string if window isnt currently a transient window. A transient window will mirror state changes in the master and inherit the state of the master when initially mapped. It is an error to attempt to make a window a transient of itself. In tkSimpleDialog, the dialog window is unconditionally made transient for the master. Windows is simply following the documentation: The askstring window inherit[s] the state of the master [i.e., withdrawn] when initially mapped. The fix is to modify tkSimpleDialog.Dialog.__init__ to only make the dialog transient for its master when the master is viewable. This mirrors what is done in dialog.tcl in Tk itself. You can either change tkSimpleDialog.py, or you can include a new definition of __init__ with these lines at the top, and the rest of the function the same: def __init__(self, parent, title = None): ''' the docstring ... ''' Toplevel.__init__(self, parent) if parent.winfo_viewable(): self.transient(parent) ... # Thanks for being so dynamic, Python! tkSimpleDialog.Dialog.__init__ = __init__; del __init__ Jeff pgp4ueSCXQcCg.pgp Description: PGP signature -- http://mail.python.org/mailman/listinfo/python-list
Re: HELP ! Anybody knows where the stackless python website is ?
Hi! Pierre-Frédéric Caillaud wrote: I've been trying desperately to access http://www.stackless.com but it's been down, for about a week now ! The stackless webpage is working again. Regards, Carl Friedrich Bolz -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Tuesday 12 April 2005 14:51 pm Michele Simionato wrote: No. Not everybody knows about Singleton. It is an acquired knowledge. Well, what isn't? What I ment to say, but failed to do so more explicitly, was that it is a term I felt which was generally known to the programming society. Or that it is a term that might pop up in a comunity where software design is an issue. This of course does not mean that you could not have used it without knowing that someone had thought of a fancy name for it. [...] It was only after many months that I understood that there was really nothing more to it. I agree. There really isn't much to Singletons. There was a time when I also did not know about Singletons or design pattern in general. But thats always the case somehow, somewhere. [...] In my lectures at Oxford next week I have carefully expunged anything referring to Singletons ;) Perhapts you shouldn't. Otherwise people might stumble over the same problem you did. IMNSHO, the property there is only one is not important enough to deserves a name. The problem here is: it has already a name. It is the probably most simple pattern there is. And if only it serves as a mind-boggingly example of a design pattern, why not call it a singleton. Why call it a class that can only be instanciated once? I do not yet feel there is being made too much fuss about it. People do not start name-dropping on singletons. Design pattern in general, perhaps. The property if you have already called this callable with the same arguments you don't need to recompute it instead is quite worthy and subsumes the other concept as a special case. It also gives you plenty of use case to illustrate it, even to beginner programmers. To step in your argument, you could also call that caching a function call. BTW: @memoize on the __new__ method isn't quite enough. You'll have to call it on __init__ as well, otherwise it is executed again on the already initialised object. Also calling @memoize on the __init__ does not suffice either, because can call it with different parameters... Ciao Uwe -- http://mail.python.org/mailman/listinfo/python-list
Northampton, UK
Just on the off chance I thought I'd ask if there were any Pythoneers out there local to Northampton UK ? Best Regards, Fuzzy http://www.voidspace.org.uk/python -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
Hi All-- Richie Hindle wrote: [Xah] motherfucking ... fucking ... fucking ... fucking ... fuck ... fucking fucking ... fucking ... mother fucking ... fucking ... piece of shit ... motherfucking ... fucking ... fucking ... big asshole ... masturbation ... Fucking morons ... fucking stupid ... fuckhead coders ... fuckheads ... you fucking asses. paypal me a hundred dollars and i'll rewrite the whole re doc in a few hours. Can we paypal you a hundred dollars to leave us alone? I'll pledge $10. Are there another nine people here who'll do the same? Why don't we pay him $100 to re-write the PERL docs? Metta, Ivan -- Ivan Van Laningham God N Locomotive Works http://www.andi-holmes.com/ http://www.foretec.com/python/workshops/1998-11/proceedings.html Army Signal Corps: Cu Chi, Class of '70 Author: Teach Yourself Python in 24 Hours -- http://mail.python.org/mailman/listinfo/python-list
Informixdb: New maintainer, new version
Hi Everybody: Since the current maintainer of the informixdb module appears to have gone missing, I have decided to take over the project. The new home of the informixdb module is http://sourceforge.net/projects/informixdb . Version 1.4 features the following improvements: * Build uses distutils instead of deprecated Makefile.pre.in mechanism. * Connect method takes optional username and password parameters for connecting to a remote database. * Cursor attribute .sqlerrd exposes Informix's sqlca.sqlerrd resulting from the cursor's most recent .execute() call. If you have any questions or comments, please let me know. Best regards, -- Carsten Haese - Software Engineer |Phone: (419) 861-3331 Unique Systems, Inc. | FAX: (419) 861-3340 1446 Reynolds Rd, Suite 313 | Maumee, OH 43537| mailto:[EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Fredrik Lundh wrote: Or if you're using an application object (you should), just add a config object to the application object (app.config.param = ...). Do you have a link or two that describe what you mean by an application object? The you should comment makes me think this is something of a design pattern, but googling around wasn't able to satisfy my curiosity. STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: [perl-python] Python documentation moronicities (continued)
On Tue, 12 Apr 2005 04:02:20 -0700, Joe Smith wrote: Xah Lee wrote: of motherf***ing irrevalent drivel? I am greatly amused. A troll impersonating Xah Lee has made xah look like a total moron. LOL The fucking doc cannot be possibly fucking worsely written. This is very Xahish though, even if it's not him. It's right up there with AND, the writting as usuall is fantastic incompetent. -- http://mail.python.org/mailman/listinfo/python-list
Re: singleton objects with decorators
Uwe Mayer wrote: Tuesday 12 April 2005 10:01 am Steven Bethard wrote: I am using a class to manage configuration settings in an application. This object should only existe once so that when the user changes a setting through a configuration dialog the change imminent in all locations where access to config settings are needed. Ahh, I see. I would typically just use a module in this situation, where the configuration settings were just names global to the module. Is there a benefit to using a singleton object over using just a module? Basically I am using a module. The config file is stored in $HOME/.app/app.conf where the user can go and edit it. It is a working python program which globally declares variables. I cannot simply import this module as it does not lie in the path and I am not too fond of dynamically cluttering sys.path to my needs. Hmmm... Maybe you could use a memoized wrapper to imp.load_source? I've never used it, but it looks kinda like it might do what you want... But I guess that probably doesn't really gain you too much over the Singleton solution... STeVe -- http://mail.python.org/mailman/listinfo/python-list
exporting imports to reduce exe size?
In looking at ways to reduce the size of exe's created with py2exe, I've noticed that it will include a whole library or module even if I only need one function or value from it. What I would like to do is to import individual functions and then export 'write' them to a common resource file and import that with just the resources I need in them. Has anyone tried this? I'm considering using pickle to do it, but was wondering if this is even a viable idea? Is it possible to pickle the name space after the imports and then reload the name space in place of the imports later? Cheers, Ron -- http://mail.python.org/mailman/listinfo/python-list
Re: Programming Language for Systems Administrator
Kanthi Kiran Narisetti [EMAIL PROTECTED] wrote in message news:[EMAIL PROTECTED] .Some of my questions regarding the same follows. Most of these have been discussed many times. You can use Google to search the archives of this newsgroup. I strongly recommend that you learn to use that resource. 1)Can i build web applications in Python ? If so how. I am planning to build a web application for intranet use which deals with workflow of Internal office communication. Yes, see Google 2)Which is best opensource database to be used with Python ? Currently being debated in another thread. See Google for previous discussions. 3)When i write a remote execution script in python is it required that python should be installed in remote system. Yes. I think there are a couple of options that have been discussed. Terry J. Reedy -- http://mail.python.org/mailman/listinfo/python-list
Re: Python / Win32 extensions compatibility with Windows XP
Matthew wrote: Hi: I recently installed Python 2.4 and the Win 32 extensions on Windows XP. I had some problems with the COM makepy utility for the Excel COM libraries. I reported this problem to the sourceforge bug tracker. My question is , is python 2.3 and the win32 extensions more stable than Python 2.4? Thank You Matthew Harelick There were some memory issues that caused makepy on Python 2.4 to crash for some large type libraries (including Excel). This problem has been fixed in build 204 of pywin32, released just today. Regards, Jim -- http://mail.python.org/mailman/listinfo/python-list
