Re: SocketServer and a Java applet listener
Steve Horsley schreef: [EMAIL PROTECTED] wrote: Dear newsgroup, I give up, I must be overseeing something terribly trivial, but I can't get a simple (Java) applet to react to incoming (python) SocketServer messages. Without boring you with the details of my code (on request available, though), here is what I do : I have a TCPServer and BaseRequestHandler . Connecting via telnet : everything goes OK. Connecting from Applet : problem 1 (worked around it) : java has some 'propietary' UTF-8 format, python's unicode doesn't seem to handle it correctly and I have to strip the first two bytes/chars , then all goes OK . Those 2 bytes are important! They are a string length indicator. Here are the docs that tell you that it puts a 2-byte length on the front: http://java.sun.com/j2se/1.5.0/docs/api/java/io/DataOutputStream.html#writeUTF(java.lang.String) If you are ignoring these bytes, then how can you be sure you have received the whole string? Please don't tell me you just hope that the whole string will always arrive in a single read() call. There is no guarantee of that. TCP does NOT have message boundaries, and TCP packets can be both fragmented and coalesced. Ah, I see... I worked around this (see below), the workaround is consistent with what you assume. My question How to send/receive between python SocketServer and java Applet (SocketListener) then seems to be boiling down to: How to interface between python unicode and java read/writeUTF? Probably the same problem. If you didn't send a 2 byte length indicator first, then java's readUTF() will have tried to interpret the first 2 bytes that you did actually send as the string length, and may well simply be waiting patiently for the rest to arrive. I just couldn't get read/writeUTF and python unicode to interface, so I refactored the applet's socketlistener to convert the socket.getInputStream to a BufferedInputReader on which I call the readline() method. I still skip the first two bytes in the python receiver which seems harmless since python doesn't use the byte length. On both sides I have other way to know when the end-of-message has been reached. A timeout mechanism provides some safety for partial transmission handling. Thanks ! Thijs -- http://mail.python.org/mailman/listinfo/python-list
Re: telnet.read_until() from telnetlib
my newsreader told me that [EMAIL PROTECTED] wrote: Please post the minimum code necessary to duplicate the problem. It's impossible, because I am writting performance tests for big commercial project, I am trying to understand why they sometime fail. By definition of read_until() it should return expected data (if it doesn't wait timeout seconds). Anyway, I am trying to use telnet.expect now, thanks. -- Free Software - find interesting programs and change them NetHack - meet interesting creatures, kill them and eat their bodies Usenet - meet interesting people from all over the world and flame them Decopter - unrealistic helicopter simulator, get it from http://decopter.sf.net -- http://mail.python.org/mailman/listinfo/python-list
Re: variable hell
I'm sorry for top-posting and not marking quoted text, but my e-mail reader
(Novell Groupwise 6 for Linux) does not mark quoted text. The only thing it
does is the $NAME $EMAIL $DATE above the quoted text. Therefore I add
my comments at the top. The only alternative I have is copying all text to an
editor, adding quote marks by hand, then copying it back into a new e-mail
message, but this takes to much of m time. If this is to confusing I will just
stop posting in this list.
My original code was: exec(eval('a%s=%s' % (count, value)))
Then Rafi said: exec('a%s=%s' % (count, value))
To which I responded that his example does not work in my Python, and I think
it's invalid.
Then Martin came with: exec 'a%s = %s' % (count, value)
This does work.
But he seems to keep telling me I'm quoting him wrong, while I'm quoting Rafi.
Furthermore I'm going with your suggestion of checking the imp, globals() and
locals().
Adriaan Renting.
Mike Meyer [EMAIL PROTECTED] 08/27/05 2:24 am
[The context is totally hosed by top posting and failure to mark
quoted text. I gave up on recovering it.]
Adriaan Renting [EMAIL PROTECTED] writes:
Not in my Python.
for count in range(0, 10):
... value = count
... exec('a%s=%s' % (count, value))
You left in the extra set of quotes. Try this:
for count in range(10):
... value = count
... exec 'a%s = %s' % (count, value)
...
dir()
['__builtins__', '__doc__', '__file__', '__name__', 'a0', 'a1', 'a2', 'a3',
'a4', 'a5', 'a6', 'a7', 'a8', 'a9', 'count', 'help', 'readline', 'rlcompleter',
'sys', 'value']
I also removed the extraneous parens that you and Rafi both used -
exec is a statement, not a function.
Of course, your two examples are better done using imp and globals() or
locals().
mike
dir()
['__builtins__', '__doc__', '__name__', 'count', 'value']
for count in range(0, 10):
... value = count
... exec(eval('a%s=%s' % (count, value)))
...
dir()
['__builtins__', '__doc__', '__name__', 'a0', 'a1', 'a2', 'a3', 'a4', 'a5',
'a6', 'a7', 'a8', 'a9', 'count', 'value']
I myself use code like this to load user defined classes.
exec(eval('from %s import %s' % (script, script)))
exec(eval('self.user_class = %s()' % script))
self.user_class.run()
But this can probably be done with the imp module too.
rafi [EMAIL PROTECTED] 08/25/05 6:03 pm
Adriaan Renting wrote:
You might be able to do something along the lines of
for count in range(0,maxcount):
value = values[count]
exec(eval('a%s=%s' % (count, value)))
why using the eval?
exec ('a%s=%s' % (count, value))
should be fine
--
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Imagination is more important than knowledge.
(Albert Einstein)
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Re: Lossless Number Conversion
Am Sonntag, den 28.08.2005, 21:36 + schrieb Chris Spencer: Is there any library for Python that implements a kind of universal number object. Something that, if you divide two integers, generates a ratio instead of a float, or if you take the square root of a negative, generates a complex number instead of raising an exception? Lisp has something like this, and it makes number crunching much more convenient. Yes and no. There isn't general solution. But for example you want to allow complex number, just use cmath. Andreas signature.asc Description: Dies ist ein digital signierter Nachrichtenteil -- http://mail.python.org/mailman/listinfo/python-list
Re: aproximate a number
Michael Sparks wrote: def approx(x): return int(x+1.0) I doubt this is what the OP is looking for. approx(3.2) 4 approx(3.0) 4 Others have pointed to math.ceil, which is most likely what the OP wants. /Mikael Olofsson Universitetslektor (Senior Lecturer [BrE], Associate Professor [AmE]) Linköpings universitet --- E-Mail: [EMAIL PROTECTED] WWW: http://www.dtr.isy.liu.se/en/staff/mikael Phone: +46 - (0)13 - 28 1343 Telefax: +46 - (0)13 - 28 1339 --- Linköpings kammarkör: www.kammarkoren.com Vi söker tenorer och basar! -- http://mail.python.org/mailman/listinfo/python-list
Re: telnet.read_until() from telnetlib
I have same problem with expect :-( I am calling: l=[expected] result=self.telnet.expect(l,timeout) it works in most cases, but sometimes (with exacly same expected value) it returns -1,Nil,some text the point is, that: - connection is still active, so it should read more! - it doesn't wait timeout seconds (I used time.time() to check that, time is zero, timeout is about 20s)! In what case expect or read_until will stop reading without waiting for timeout? -- Free Software - find interesting programs and change them NetHack - meet interesting creatures, kill them and eat their bodies Usenet - meet interesting people from all over the world and flame them Decopter - unrealistic helicopter simulator, get it from http://decopter.sf.net -- http://mail.python.org/mailman/listinfo/python-list
Re: OpenSource documentation problems
Marked -1 Flamebait, but I'll respond anyway. I've read the documents he refers to, and although I agree that the Python docs aren't perfect, I do not agree with him on which points. I for example do think it's important to incude info on which versions of the language support a feature. He seems to think the GNU man pages are nice, but I find them very awkward as they have no hierarchical organization, and most miss examples. I do agree that a lot of OSS projects seem to lack somewhat in the documentation department, compared to a lot of commercial software. I would give the man page of gcc as an example, it's just one 6600 line blurb. The other part where a lot of OSS seems to be lacking is user interface design. I think the cause is that the OSS movement is almost solely comprised of programmers, while in a commercial environment there will be a lot of documentation writers and interface designers (and marketing, etc...) I know I write my own documentation for the code I create, but I know I'll not do as good a job as a separate good doc writer would. In general I think the programmers should not write the documentation, and should not be the sole designers of the UI either. The good commercial docs are better because there it is understood how important this is. I myself have always liked the Borland documentation a lot. The big question is: how to attract more doc writers to the OSS movement? Adriaan Renting. -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question: Sub-interpreters for CAD program
On Saturday 27 August 2005 03:21 am, David MacQuigg wrote: The discouraging thing about the EDA tools situation is that no matter how loudly design engineers complain about the poor quality of the proprietary tools they are using, there is very little interest in participating in an open-source project. They just can't see how it would ever do what their expensive tools do now. Yes. I think this is analogous to the problems with word processors and office workers. The concern is driven I think by a fear of incompatibility. It's certainly difficult to deal with the reality that many people in business insist on distributing information in whatever nasty variant of .doc format their word processor happens to spit out, and it's not easy to be sure you can read it. Similarly, if you can't read AutoCAD formatted CAD files in a mechanical design business, you're basically screwed. That's a strong motivation to keep using AutoCAD no matter how awful the program itself is. It will take a really big, long-term push by a fair number of interested people to give a free alternative a chance against such an entrenched existing proprietary application. In the long term, it would be worth it, but a lot of people have to back it for a long time, and that's hard to organize. There is a similar lack of interest in the academic community. None of this is likely to lead to publications in scholarly journals. I'm confused by what you meant by this. Are you saying that academics are afraid of using or creating open source CAD tools, or that they have a lack of interest in tools development, because it won't generate papers (directly anyway)? -- Terry Hancock ( hancock at anansispaceworks.com ) Anansi Spaceworks http://www.anansispaceworks.com -- http://mail.python.org/mailman/listinfo/python-list
Python built email message doesn't support OutLook Express
Dear All,
I am working in web based email system project.
Here I try to build email message
from scratch. I used below code to build email
message
msg = email.MIMEBase('text','html')
msg['Return-Path'] = user+'@'+domain
msg['Date'] = formatdate(localtime=1)
msg['Subject'] = subject
msg['From'] = from_name
msg['To'] = to
msg['Cc'] = cc
msg.set_payload(Body of the email messagge)
fh = os.popen('/bin/sendmail %s'% (eachid),'w')
fh.write(msg.as_string())
fh.close()
This code will build plain email message properly.
But after building the message. If a email user
download this mail through out look express then
this email message will display without any alignment.
If a user type 3 paragraph message
outlook express display as a single line. What
could be problem?. Kindly let me know ASAP
regards
Prabahar
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reg email packages work
Dear All,
I am working in web based email system project.
Here I try to build email message
from scratch. I used below code to build email
message
msg = email.MIMEBase('text','html')
msg['Return-Path'] = user+'@'+domain
msg['Date'] = formatdate(localtime=1)
msg['Subject'] = subject
msg['From'] = from_name
msg['To'] = to
msg['Cc'] = cc
msg.set_payload(Body of the email messagge)
fh = os.popen('/bin/sendmail %s'% (eachid),'w')
fh.write(msg.as_string())
fh.close()
This code will build plain email message properly.
But after building the message. If a email user
download this mail through out look express then
this email message will display without any alignment.
If a user type 3 paragraph message
outlook express display as a single line. What
could be problem?. Kindly let me know ASAP
regards
Prabahar
__
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FREE with Yahoo! Photos http://in.photos.yahoo.com
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Re: Bug in string.find; was: Re: Proposed PEP: New style indexing,was Re: Bug in slice type
Robert Kern wrote: If I may digress for a bit, my advisor is currently working on a project that is processing seafloor depth datasets starting from a few decades ago. A lot of this data was orginally to be processed using FORTRAN software, so in the idiom of much FORTRAN software from those days, is often used to mark missing data. Unfortunately, is a perfectly valid datum in most of the unit systems used by the various datasets. Now he has to find a grad student to traul through the datasets and clean up the really invalid 's (as well as other such fun tasks like deciding if a dataset that says it's using feet is actually using meters). I'm afraid this didn't end with FORTRAN. It's not that long ago that I wrote a program for my wife that combined a data editor with a graph display, so that she could clean up time lines with length and weight data for children (from an international research project performed during the 90's). 99cm is not unreasonable as a length, but if you see it in a graph with other length measurements, it's easy to spot most of the false ones, just as mistyped year part in a date (common in the beginning of a new year). Perhaps graphics can help this grad student too? It's certainly much easier to spot deviations in curves than in an endless line of numbers if the curves would normally be reasonably smooth. -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing portable applications
Mike Meyer wrote: I'm still waiting for an answer to that one - where's the Java toolkit that handles full-featured GUIs as well as character cell interfaces. Without that, you aren't doing the job that the web technologies do. Where is the text-mode browser that would even run part of the web apps I use, like home-banking, all web forums, server configuration interfaces, etc.? I think we should leave both these questions open. (In fact, as to UIs using Java, blech! Haven't seen a really good one...) I just wonder who wrote fully standards compliant web browsers for those 90 platforms. Nobody. I doubt there's a fully standards compliant web browser Nobody, huh? Then how could you run just ANY web application on those platforms? The same way you write POSIX applications in the face of buggy implementations - by working around the bugs in the working part of the implementation, and using conditional code where that makes a serious difference. But as soon as some user of platform 54 tries your website, she'll encounter some weird behavior without even knowing why. And maybe so will you, especially if you don't have that platform there for testing. I don't understand how this web thing changes anything... With POSIX at least you have a real bug-report for the guy responsible for it. If a platform keeps being buggy, with no fixes coming, screw them. Every user will see that sooner or later, and these platforms die. Even Windows is quite stable/reliable after 10+ years NT! available for *any* platform, much less any non-trivial collection of them. You write portable web applications to the standards, and design them to degrade gracefully. Then you go back and work around any new Oh right, they degrade gracefully. So without Javascript or cookies (the former is often not implemented) you get a HTML page with an error notice -- if you're lucky. You left off the important part of what I had to say - that the application be written by a moderately competent web author. But if you can cater for all kinds of sub-platforms, then why not just provide a CLI as well as those GUI interfaces, when we're duplicating work to begin with? ;) If it doesn't run without JS, then you lock out 90% of all alive platforms (and maybe 1% of all alive users :D) anyway. A server AND client for a simple protocol designed for its task (i.e. not FTP for instance) can be implemented in much less work than even designing even part of a web application backend that does that kind of stuff. Well, if it that easy (and web applications are dead simple), it should be done fairly frequently. Care to provide an example? We have all the web standards, with various extensions over the years. Some FTP clients even don't crash if they see that some server doesn't yet support the extension from RFC [EMAIL PROTECTED] Then there's tons of inter-application traffic in XML already, growing fast. Then there are s-expressions (Lisp XML if you want). Then probably thousands of ad-hoc line-based text protocols, but I don't know how well they can be extended. There's CORBA. Most web standards are simple, at least if you would subtract the weird stuff (and IMHO there should be new versions of everything with the crap removed). XML is somewhat simple, just hook libxml. There's NNTP. There's RSS. There's Atom. The latter two emerged quite painlessly, even though you could maybe use some website for what they provide. But this way you have lots of clients for lots of platforms already. You think you're done. A lot of developers think you can stop with the first one or two. You're all right for some applications. For others, you're not. Personally, I like applications that run on all the platforms I use - and your set doesn't cover all three of those systems. Ok, I'd be interested to hear what those are. VMS, RiscOS, Mac OS 9...? FreeBSD, OS X and a Palm Vx. Didn't I say, a GUI for the Mac, for X11, and Windows? That only leaves out the Palm. I heard they aren't too hard to program for, either. But I haven't heard of a really decent browser for pre-OS5 PalmOS (not sure about OS5). If a system's scheduler, or select implementation sucks, though, I'd complain to the vendor or simply abandon the platform for another. Competition is good :) Complaining to the vendor doesn't always get the bug fixed. And refusing to support a platform isn't always an option. Sometimes, you have to byte the bullet and work around the bug on that platform. Sure, but you can tell your customers that unfortunately their system vendor refuses to fix a bug and ask THEM to ask that vendor. Boy, will they consider another platform in the future, where bugs do get fixed ;) same thing applies to threads, except such code typically includes a third option of not using threads at all. And so on. Well, who doesn't do threads after several years of POSIX IMHO can't be taken
sslerror: (8, 'EOF occurred in violation of protocol') ???
On some connections only from some computers/network setups I get this error: Traceback (most recent call last): File interactive input, line 1, in ? File ClientCookie\_urllib2_support.pyo, line 524, in open File ClientCookie\_urllib2_support.pyo, line 424, in http_response File ClientCookie\_urllib2_support.pyo, line 541, in error File urllib2.pyo, line 306, in _call_chain File ClientCookie\_urllib2_support.pyo, line 185, in http_error_302 File ClientCookie\_urllib2_support.pyo, line 518, in open File urllib2.pyo, line 326, in open File urllib2.pyo, line 306, in _call_chain File ClientCookie\_urllib2_support.pyo, line 759, in https_open File ClientCookie\_urllib2_support.pyo, line 608, in do_open File httplib.pyo, line 712, in endheaders File httplib.pyo, line 597, in _send_output File httplib.pyo, line 564, in send File httplib.pyo, line 985, in connect File socket.pyo, line 73, in ssl sslerror: (8, 'EOF occurred in violation of protocol') The server is always the same and ok. but different client-OS/proxies/firewalls/routers are in use. What is the nature of this error? How is it possible that an EOF in ssl-connections (during connect?) occures? What can be done to handle/circumvent that problem? Robert -- http://mail.python.org/mailman/listinfo/python-list
Re: OpenSource documentation problems
Adriaan Renting [EMAIL PROTECTED] writes: He seems to think the GNU man pages are nice, but I find them very awkward as they have no hierarchical organization, and most miss examples. The GNU man pages are an afterthought to meet expectations of Un*x users who were used to man pages and the man command. The good GNU docs are in texinfo format, not man pages. They have lots of examples and they hierarchical structure and were designed to be navigated with a pre-www hypertext browser or alternatively generate printed manuals. These days there are also programs to render them as html so you can navigate them with web browses. I do agree that a lot of OSS projects seem to lack somewhat in the documentation department, compared to a lot of commercial software. I would give the man page of gcc as an example, it's just one 6600 line blurb. The other part where a lot of OSS seems to be lacking is user interface design. The man page only exists for the sake of users who insisted on having a doc in that inferior format. The official gcc doc is at: http://gcc.gnu.org/onlinedocs/gcc-4.0.1/gcc/ The big question is: how to attract more doc writers to the OSS movement? It's traditionally been a problem. The FSF has hired a number of tech writers over the years, and paid them to write docs. That's one way. -- http://mail.python.org/mailman/listinfo/python-list
Re: Bug in string.find; was: Re: Proposed PEP: New style indexing,was Re: Bug in slice type
Op 2005-08-27, Terry Reedy schreef [EMAIL PROTECTED]: Paul Rubin http://phr.cx@NOSPAM.invalid wrote in message news:[EMAIL PROTECTED] Terry Reedy [EMAIL PROTECTED] writes: The try/except pattern is a pretty basic part of Python's design. One could say the same about clutter for *every* function or method that raises an exception on invalid input. Should more or even all be duplicated? Why just this one? Someone must have thought str.find was worth having, or else it wouldn't be in the library. Well, Guido no longer thinks it worth having and emphatically agreed that it should be added to one of the 'To be removed' sections of PEP 3000. I think a properly implented find is better than an index. If we only have index, Then asking for permission is no longer a possibility. If we have a find that returns None, we can either ask permission before we index or be forgiven by the exception that is raised. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Bug in string.find; was: Re: Proposed PEP: New style indexing, was Re: Bug in slice type
Op 2005-08-27, Steve Holden schreef [EMAIL PROTECTED]: If you want an exception from your code when 'w' isn't in the string you should consider using index() rather than find. Sometimes it is convenient to have the exception thrown at a later time. Otherwise, whatever find() returns you will have to have an if in there to handle the not-found case. And maybe the more convenient place for this if is in a whole different part of your program, a part where using -1 as an invalid index isn't at all obvious. This just sounds like whining to me. If you want to catch errors, use a function that will raise an exception rather than relying on the invalidity of the result. You always seem to look at such things in a very narrow scope. You never seem to consider that various parts of a program have to work together. So what happens if you have a module that is collecting string-index pair, colleted from various other parts. In one part you want to select the last letter, so you pythonically choose -1 as index. In an other part you get a result of find and are happy with -1 as an indictation for an invalid index. Then these data meet. -- Antoon Pardon -- http://mail.python.org/mailman/listinfo/python-list
Re: Bug in string.find; was: Re: Proposed PEP: New style indexing,was Re: Bug in slice type
Magnus Lycka wrote: Robert Kern wrote: If I may digress for a bit, my advisor is currently working on a project that is processing seafloor depth datasets starting from a few decades ago. A lot of this data was orginally to be processed using FORTRAN software, so in the idiom of much FORTRAN software from those days, is often used to mark missing data. Unfortunately, is a perfectly valid datum in most of the unit systems used by the various datasets. Now he has to find a grad student to traul through the datasets and clean up the really invalid 's (as well as other such fun tasks like deciding if a dataset that says it's using feet is actually using meters). I'm afraid this didn't end with FORTRAN. It's not that long ago that I wrote a program for my wife that combined a data editor with a graph display, so that she could clean up time lines with length and weight data for children (from an international research project performed during the 90's). 99cm is not unreasonable as a length, but if you see it in a graph with other length measurements, it's easy to spot most of the false ones, just as mistyped year part in a date (common in the beginning of a new year). Perhaps graphics can help this grad student too? It's certainly much easier to spot deviations in curves than in an endless line of numbers if the curves would normally be reasonably smooth. Yes! In fact, that was the context of the discussion when my advisor told me about this project. Another student had written an interactive GUI for exploring bathymetry maps. My advisor: That kind of thing would be really great for this new project, etc. etc. -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: variable hell
Adriaan Renting wrote:
My original code was: exec(eval('a%s=%s' % (count, value)))
Then Rafi said: exec('a%s=%s' % (count, value))
To which I responded that his example does not work in my Python, and I think
it's invalid.
Then Martin came with: exec 'a%s = %s' % (count, value)
This does work.
But he seems to keep telling me I'm quoting him wrong, while I'm quoting Rafi.
Read more carefully. rafi did not put in the extraneous quotes.
rafi:
Adriaan Renting wrote:
You might be able to do something along the lines of
for count in range(0,maxcount):
value = values[count]
exec(eval('a%s=%s' % (count, value)))
why using the eval?
exec ('a%s=%s' % (count, value))
should be fine
--
rafi
See? No extra quotes.
--
Robert Kern
[EMAIL PROTECTED]
In the fields of hell where the grass grows high
Are the graves of dreams allowed to die.
-- Richard Harter
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Re: Question
Much more useful stuff for beginners is here: http://wiki.python.org/moin/BeginnersGuide -- http://mail.python.org/mailman/listinfo/python-list
Re: close failed: [Errno 0] No error goes to stdout
I run a Java command line program. The point is, that it's not the program that output this error message for sure. And I don't expect popen3() to catch and report errors. I just want to keep my screen output clean, and I expect popen3() to run the program and not let anything slip to the screen, after all as I understood it is supposed to capture STDERR and STDOUT, but maybe I didn' t understand it right (it's quite probable). Anyway anyway I can do such a thing? Thanks. Peter Hansen wrote: Yoav wrote: I use the following code to the console output: def get_console(cmd): try: p_in, p_out, p_err = os.popen3(cmd) except: pass out_str = '' for obj in p_out: out_str = out_str + obj for obj in p_err: out_str = out_str + obj return out_str for some reason some exceptions (stderr outputs) are not captured by the try method, and slip to the screen. Any one has any idea on how can prevent from any output that I don't want to? The output I get on these exceptions is: close failed: [Errno 0] No error What makes you think the errors are getting past the try/except? Could they be printed by the program you are invoking with popen3() instead? What does cmd equal when you get this failure? Maybe you are expecting that popen3() will somehow raise exceptions when the called program fails, exceptions which the except statement would catch. That's not the case. -Peter -- http://mail.python.org/mailman/listinfo/python-list
RE: Python built email message doesn't support OutLook Express
I used below code to build email message [...] msg.set_payload(Body of the email messagge) [...] This code will build plain email message properly. But after building the message. If a email user download this mail through out look express then this email message will display without any alignment. What do you mean without any alignment? Text always has an alignment (unless the letters are scattered across the screen, I suppose). You're sending a plain-text email (with a MIME type of 'html'), so it's up to the client (OE) to decide how to display it. If a user type 3 paragraph message outlook express display as a single line. Are you putting line breaks in the message? I suspect that what you're missing is that you're meaning to put some HTML in the message, and aren't (the content type hints at this). =Tony.Meyer -- http://mail.python.org/mailman/listinfo/python-list
Re: Python built email message doesn't support OutLook Express
praba kar enlightened us with: This code will build plain email message properly. It's not a plain email message. It's an html email without a plain text part. Highly annoying to many people. But after building the message. If a email user download this mail through out look express then this email message will display without any alignment. Post the msg.as_string() output so we can see whay you're sending. Sybren -- The problem with the world is stupidity. Not saying there should be a capital punishment for stupidity, but why don't we just take the safety labels off of everything and let the problem solve itself? Frank Zappa -- http://mail.python.org/mailman/listinfo/python-list
Re: Python built email message doesn't support OutLook Express
--- Sybren Stuvel
[EMAIL PROTECTED] wrote:
praba kar enlightened us with:
This code will build plain email message properly.
It's not a plain email message. It's an html email
without a plain
text part. Highly annoying to many people.
But after building the message. If a email user
download this mail
through out look express then this email message
will display
without any alignment.
Post the msg.as_string() output so we can see whay
you're sending.
msg = email.MIMEBase('text','html')
msg['Return-Path'] = user+'@'+domain
msg['Date'] = formatdate(localtime=1)
msg['Subject'] = subject
msg['From'] = from_name
msg['To'] = to
msg['Cc'] = cc
msg.set_payload(Body of the email messagge)
fh = os.popen('/bin/sendmail %s'% (eachid),'w')
fh.write(msg.as_string())
fh.close()
Here I am sending what I was built in the message
example to headers(address,cc address, subject) and
Body of the mail content (ie) msg.set_payload(Body of
the email messagge)
regards
Prabahar
__
Free antispam, antivirus and 1GB to save all your messages
Only in Yahoo! Mail: http://in.mail.yahoo.com
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Re: SocketServer and a Java applet listener
[EMAIL PROTECTED] wrote: Steve Horsley schreef: Probably the same problem. If you didn't send a 2 byte length indicator first, then java's readUTF() will have tried to interpret the first 2 bytes that you did actually send as the string length, and may well simply be waiting patiently for the rest to arrive. I just couldn't get read/writeUTF and python unicode to interface, so I refactored the applet's socketlistener to convert the socket.getInputStream to a BufferedInputReader on which I call the readline() method. I still skip the first two bytes in the python receiver which seems harmless since python doesn't use the byte length. On both sides I have other way to know when the end-of-message has been reached. A timeout mechanism provides some safety for partial transmission handling. I would encourage you to re-think this. There are two normal ways to delineate messages in the byte-stream: An explicit length indication up front (which java read/writeUTF chooses), or a unique end-of-message indication at the end such as your readline() for strings that end in linefeed. HTTP is an interesting mixture of these - the header contains a content-length line telling you how long the payload is, but the header itslef is variable length, terminated by a blank line. In chunked encoding, there is a variable number of chunks, and the last chunk is marked as such in the header. Anyway, either approach is good. But using timing to separate messages is Bad. There is always the chance that you will get bitten by strange timings happening later on. If you choose to go for the java read/writeUTF approach, the 2-byte length indicator goes Most Significant Byte first, so a 100 char string would be preceded by 00 64 ... Also, the indicator gives the number of bytes after encoding, not the number of characters before encoding. Steve -- http://mail.python.org/mailman/listinfo/python-list
Re: Lossless Number Conversion
Chris Spencer wrote: Is there any library for Python that implements a kind of universal number object. Something that, if you divide two integers, generates a ratio instead of a float, or if you take the square root of a negative, generates a complex number instead of raising an exception? Lisp has something like this, and it makes number crunching much more convenient. Chris If you are on any Unix-like platform, you might want to check out clnum. It works like the gmpy package but has complex versions of rationals and arbitrary precision floats. http://calcrpnpy.sourceforge.net/clnum.html -- http://mail.python.org/mailman/listinfo/python-list
CHANGE OF EMAIL ADDRESS NOTIFICATION
CHANGE OF EMAIL ADDRESS NOTIFICATION Dear Clients, Suppliers Friends, Effective August 1st 2005, my new email address will be [EMAIL PROTECTED] During this transition period, I'll still be receiving mails from my old account. Thanks Regards, Tracy Taw SWOT Brand Architecture Sdn Bhd an entity of SWOT DESIGN GROUP T. 603 7877 6000 F. 603 7877 9005 E. [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: ideas for university project ??
Am Fri, 26 Aug 2005 12:21:36 -0400 schrieb Steve Holden: Thomas Guettler wrote: Am Fri, 26 Aug 2005 11:49:34 +0100 schrieb Jon Hewer: you could port Python to the WRT54. The Linksys WRT54 is a WLAN-Router which runs Linux. See http://openwrt.org/ I think it is a good project for a university. It is software and hardware related. Thomas It would be a good final-year project, but you may want to try something that hasn't already been done ... see http://skreak.com/wrt54g/python.php Hi, I know this. This is NFS mounted. You could strip down python to get it running standalone. Thomas -- Thomas Güttler, http://www.thomas-guettler.de/ -- http://mail.python.org/mailman/listinfo/python-list
Re: Python built email message doesn't support OutLook Express
That is not what Sybren requested - we need the message text. If you send html, make sure your paragraphs are html paragraphs (enclosed in p-tags) and not pure whitespace, as html ignores these. Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
In comp.lang.perl.misc Mike Meyer [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] writes: In comp.lang.perl.misc John Bokma [EMAIL PROTECTED] wrote: Chris Head [EMAIL PROTECTED] wrote: What advantages would those be (other than access from 'net cafes, but see below)? And workplaces. Some people have more then one computer in the house. My partner can check her email when I had her over the computer. When I want to check my email when she is using it, I have to change the session, fire up Thunderbird (which eats away 20M), and change the session back. Not a Windows solution, but I find the 'screen' utility invaluable as I can have my email, news, and an editor open in different screens and then when I need to move to a different machine, I can simply detach and reattach screen without disturbing anything that might be running. For a more portable solution, check out VNC. I know... but it is a bugger to set up and I believe it is no longer freeware (if it ever was), and it does not have the stark simplicity which screen has... I only need to have a compiled version of screen on the machine on which I do most of my work and be able to ssh/telnet to that machine without involving any additional software installations on other machines. Axel -- http://mail.python.org/mailman/listinfo/python-list
Re: aproximate a number
Mikael Olofsson wrote: Michael Sparks wrote: def approx(x): return int(x+1.0) I doubt this is what the OP is looking for. ... Others have pointed to math.ceil, which is most likely what the OP wants. I agree that's likely but, as Michael pointed out in the text you removed, his version does do what the OP's spec states, when interpreted literally. Very likely there's a language issue involved, and Michael was aware of that as well, I'm sure. Still, others had already posted on math.ceil(), so Michael was just trying to make sure that the OP realized his specification was inadequate and -- just in case he wanted something other than math.ceil -- he provided a valid alternative. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Re: close failed: [Errno 0] No error goes to stdout
(Please don't top-post. It makes quoting difficult and it's hard for people to follow the conversation.) Yoav wrote: I run a Java command line program. The point is, that it's not the program that output this error message for sure. Okay. Since you don't provide any proof, we'll have to take you at your word. In that case, please provide the *complete traceback*, cut and pasted from your console window. Don't just retype the error message. Generally people leave out crucial information when they do that. The traceback (which Python will always print when it raises an exception) shows the failing line of code and the stack trace. With it we can help you troubleshoot the problem. Without it, you haven't provided enough information yet for anyone to do more than guess. -Peter -- http://mail.python.org/mailman/listinfo/python-list
Pointers and ctypes
Hello, i've got a problem with pointers in the following function which i want to use: I16 __stdcall DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value) The function is supposed to read out the status of a digital port of analog digital interface card. I got this function from Dask.h which came with the card. The relevant lines concerning this function are the following: typedef short I16; typedef unsigned short U16; typedef unsigned long U32; I16 __stdcall DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value) I tried to implement this function into python: # I16 __stdcall DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value); ReadOPort = dask.DO_ReadPort ReadOPort.argtypes = [c_ushort, c_ushort, c_ulong] ReadOPort.restype = c_short I can't handle the pointer Value which should be an unsigned long pointer. I'd be very happy, if u could give me a hint how to implement this pointer into python. Thanks a lot Carlo and Pierre -- http://mail.python.org/mailman/listinfo/python-list
NYC Opening
A major Investment Bank is searching for a strong Java or C++ developer that can build Pipes to Electronic Exchanges and ECNs. This is a new Internal Hedge Fund Business and they are looking for superb C++ or Java programmers that can enable them to go live in 1-2 months and begin trading. THIS IS AN OPPORTUNITY TO WORK IN THE BUSINESS UNIT OF A MAJOR TOP-TIERED BANK! Required Skills: -Expert Java or C++ -Extensive Multi-threading -OOA/OOD Must have Design Patterns Experience -Must have experience building Pipes/Connectivity Infrastructure/FIX -Linux, Unix, SQL/RDBMS Eventually this person will learn Stat/Arb business for Equities/FX and will get to learn about trading strategies and work closely with Quants/Prop Traders. THEY ARE LOCATED IN NEW YORK, THIS IS FULL-TIME ONLY, WILL NOT CONSIDER ANYONE FROM OUTSIDE THE US! THIS TEAM IS AN ELITE TEAM, YOU BETTER BE GOOD Also have numerous opportunities so if you program in C++ or Java send me an email or give me a call. - Kevin M McGann Senior Technology Recruiter Continuity Partners Inc. (212) 624-9187 www.cpi-search.com [EMAIL PROTECTED] - -- http://mail.python.org/mailman/listinfo/python-list
Re: using common lisp with python.
[EMAIL PROTECTED] a écrit : is there a way to embed common lisp programs in python? It depends on what you call embedding ... can you be more specifiv about what you want ? -- http://mail.python.org/mailman/listinfo/python-list
Re: variable hell
Oops, you're completely right. I'm sorry, it is indeed my mistake. I was thinking people were telling me I was quoting Martin wrong, while I was quoting Rafi wrong. I'll promise not quote anybody anymore until I have an e-mail program that can quote/copy properly. As reading it in one window, then typing it in another to test it, then copying it back, obviously introduced a PEBKAC error. Adriaan Renting -- http://mail.python.org/mailman/listinfo/python-list
Re: Writing portable applications (Was: Jargons of Info Tech industry)
On Sat, 27 Aug 2005 14:35:05 -0400, Mike Meyer [EMAIL PROTECTED] wrote: Ulrich Hobelmann [EMAIL PROTECTED] writes: Mike Meyer I wonder could you guys stop cross-posting this stuff to comp.lang.perl.misc? The person who started this thread - a well-known troll - saw fit to post it there, and now all your posts are going there too. -- Henry LawManchester, England -- http://mail.python.org/mailman/listinfo/python-list
Re: Pointers and ctypes
Le 29 Aug 2005 06:19:17 -0700, [EMAIL PROTECTED] a écrit : Hello, i've got a problem with pointers in the following function which i want to use: I16 __stdcall DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value) The function is supposed to read out the status of a digital port of analog digital interface card. I got this function from Dask.h which came with the card. The relevant lines concerning this function are the following: typedef short I16; typedef unsigned short U16; typedef unsigned long U32; I16 __stdcall DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value) I tried to implement this function into python: # I16 __stdcall DO_ReadPort (U16 CardNumber, U16 Port, U32 *Value); ReadOPort = dask.DO_ReadPort ReadOPort.argtypes = [c_ushort, c_ushort, c_ulong] ReadOPort.restype = c_short I can't handle the pointer Value which should be an unsigned long pointer. I'd be very happy, if u could give me a hint how to implement this pointer into python. You can use the ctypes.byref() function (as it is in an argulent list): ReadOPort.argtypes = (c_ushort, c_ushort, ctypes.POINTER(c_ulong) ) ReadOPort.restype = c_short status = c_ulong() # status value to be read number = c_ushort(1) # CardNumber = 1 port = c_ushort(11) rc = ReadOPort(number, port, ctypes.byref(status)) print rc, ststus Thanks a lot Carlo and Pierre -- http://mail.python.org/mailman/listinfo/python-list
Re: NYC Opening
Kevin McGann wrote: -Expert Java or C++ Now why exactly do you post that in c.l.python? THEY ARE LOCATED IN NEW YORK, THIS IS FULL-TIME ONLY, WILL NOT CONSIDER ANYONE FROM OUTSIDE THE US! THIS TEAM IS AN ELITE TEAM, YOU BETTER BE GOOD I'm pretty sure you've some spelling wrong here, you certainly want ELITE to be written as 733T to get the attention of the proper people. SCNR, Diez -- http://mail.python.org/mailman/listinfo/python-list
Re: What are new-style classes?
Vaibhav wrote: I recently heard about 'new-style classes'. I am very sorry if this sounds like a newbie question, but what are they? I checked the Python Manual but did not find anything conclusive. Could someone please enlighten me? Thanks! In short: They have inherited object from somewhere. (This is probably technically inaccurate, but it's the only thing I have seen which defines a 'new-style class'). What it means *practically*, is that you can use properties. For a long while I didn't really understand the point or properties, until I needed them. I have written a flowcharting application in Python. All objects on the flowchat are derived from a base object which has the attribute text (all objects have some form of, sometimes internal only, title). Problem is that when some objects change text, I want to perform some recalculations. So I wrote a text property, which - in its settext-method - does all the calculations if required. That way, the application can till use: obj.text = 'Blah' ..and still have the chance to act on the text change. I could have simply written a setText() method, but imho properties are neater - but that's just a matter of opinion. -- Kind Regards, Jan Danielsson Te audire no possum. Musa sapientum fixa est in aure. -- http://mail.python.org/mailman/listinfo/python-list
Re: Pointers and ctypes
thanks a bunch, i just got the answer myself. next time i think about it a little longer. thanks again carlo -- http://mail.python.org/mailman/listinfo/python-list
Re: Pointers and ctypes
F. Petitjean wrote: Le 29 Aug 2005 06:19:17 -0700, [EMAIL PROTECTED] a écrit : ... You can use the ctypes.byref() function (as it is in an argulent list): ReadOPort.argtypes = (c_ushort, c_ushort, ctypes.POINTER(c_ulong) ) ReadOPort.restype = c_short status = c_ulong() # status value to be read number = c_ushort(1) # CardNumber = 1 port = c_ushort(11) rc = ReadOPort(number, port, ctypes.byref(status)) print rc, ststus Just as an FYI, Thomas has recently added code which does the byref automatically. The version of ctypes in CVS HEAD will allow you to pass in a c_ulong where the argtype is ctypes.POINTER(c_ulong). Have fun, Mike -- Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com -- http://mail.python.org/mailman/listinfo/python-list
Re: python image thumbnail generator?
Paul Rubin wrote (1) Can this be done with python? If so, what module do I need to look up? You could do it with PIL, or run jpegtran in an external process. jpegtran may be easier. eh? are you sure you know what jpegtran does? JPEGTRAN(1) JPEGTRAN(1) NAME jpegtran - lossless transformation of JPEG files SYNOPSIS jpegtran [ options ] [ filename ] DESCRIPTION jpegtran performs various useful transformations of JPEG files. It can translate the coded representation from one variant of JPEG to another, for example from baseline JPEG to progressive JPEG or vice versa. It can also perform some rearrangements of the image data, for example turning an image from landscape to portrait format by rotation. jpegtran works by rearranging the compressed data (DCT coefficients), without ever fully decoding the image /.../ /F -- http://mail.python.org/mailman/listinfo/python-list
Re: python image thumbnail generator?
Mike C. Fletcher wrote: The core function looks something like this: import Image # this is PIL def getThumbnail( filename, size = (32,32) ): '''Get a thumbnail image of filename''' image = Image.open(filename) rx, ry = image.size[0]/float(size[0]), image.size[1]/float(size[1]) if rx ry: resize = int(size[0]), int(round(image.size[1]*(1.0/rx), 0)) else: resize = int(round(image.size[0]*(1.0/ry), 0)), int(size[1]) image = image.resize( resize, Image.BILINEAR ) footnote: if you're creating thumbnails from JPEG or PhotoCD images, using the thumbnail method can be a lot more efficient (unlike resize, it tweaks the codec so it doesn't have to load the entire full-sized image). footnote 2: Image.ANTIALIAS is slower, but tends to give a much better result than Image.BILINEAR, especiall for noisy images. /F -- http://mail.python.org/mailman/listinfo/python-list
Python and file locking - NFS or MySQL?
Hi all... ...I've got a Python script running on a bunch of boxen sharing some common NFS-exported space. I need (not want :) to lock files for writing, and I need (not want :) to do it safely (i.e. atomically). I'm doing this in Linux; NFS4 is available. As I understand it, my options are: 1. Python's fcntl() is an interface to the fcntl(2) system call, which is claimed to work mostly over NFS v = 3. 2. open(2) is atomic on a local FS, I've read discussions that imply that link(2) is atomic over NFS (is it?), so I can link from local lockfile to remote target atomically. I don't grok this; open(2) + link(2) + stat(2) == 3 calls on my fingers. HTH is this supposed to work? 3. Atomically update a MySQL database indicating that the file is locked - MySQL has atomic transactions now, right? And how good is the Python MySQL API - IIRC Perl didn't have atomic transactions last year; will this work in contemporary Python? I've got a while (several weeks) to chew this problem over (my current implementation is ``assert(Poof! File locked)''). What are my options for safely locking files via NFS? I don't want to get involved with NLM as my impression is it's being buggy and unwieldy. Thanks in advance! I was present at an undersea, unexplained mass sponge migration. -- Christopher DeMarco [EMAIL PROTECTED] Alephant Systems (http://alephant.net) PGP public key at http://pgp.alephant.net +1 412 708 9660 signature.asc Description: Digital signature -- http://mail.python.org/mailman/listinfo/python-list
Re: py-serial + CSV
Thanks you all, guys, for your suggestions and help. Everything now works great :) Regards Petr Jakes -- http://mail.python.org/mailman/listinfo/python-list
Robust statistics and optimmization from Python
I use Python to generate a huge amount of data in a .csv file which I then process using Excel. In particular, I use Excel's solver to solve a number of non-linear equation, and then regress the results of hundreds of calls to Solver against a set of known values, enabling me to calibrate my model. This is a pain: i'd much rather perform all the computations in Python and improve on Excels' regression as well. Questions: 1. Is there a way to perform (or make a call to) a non-linear optimization from Python? 2. Do Python packages for robust statistics (robust regression in particular) exist. If so, which one would you recommend/ Thanks, as always, in advance for the guidance Thomas Philips -- http://mail.python.org/mailman/listinfo/python-list
python xml DOM? pulldom? SAX?
Hi, I want to get text out of some nodes of a huge xml file (1,5 GB). The architecture of the xml file is something like this parent page titlebla/title id/id revision id/id textblablabla/text revision /page page /page /parent I want to combine the text out of page:title and page:revision:text for every single page element. One by one I want to index these combined texts (so for each page one index) What is the most efficient API for that?: SAX ( I don´t thonk so) DOM or pulldom? Or should I just use Xpath somehow. I don`t want to do anything else with his xml file afterwards. I hope someone will understand me. Thank you very much Jog -- http://mail.python.org/mailman/listinfo/python-list
Re: overload builtin operator
Robert Kern wrote: Shaun wrote: Thanks for your replies, obviously this isn't a simple thing to do so I'll take a different tack. The exact problem I am trying to solve here is to avoid the ZeroDivisionError in division. I have c++ code which delegates to python to calculate expressions on table cells. The values of the table cell are arbitary numbers and the expressions to be calculated are fairly simple python arithmetic and math functions. The problem being that some users want an expression like '(100/x)+ 3' where x=0 to return 3. So that dividing a number by zero results in 0. You have silly users. You mean you don't? Damn. Can I have some of yours? Iain -- http://mail.python.org/mailman/listinfo/python-list
GIL, threads and scheduling - performance cost
Hi all, Wondering if a GIL lock/unlock causes a re-schedule/contect swap when embedding Python in a multi-threaded C/C++ app on Unix ? If so, do I have any control or influence on this re-scheduling ? The app suffers from serious performance degradation (compared to pure c/C++) and high context switches that I suspect the GIL unlocking may be aggravating ? Thanks for any help. Alan -- http://mail.python.org/mailman/listinfo/python-list
Re: Robust statistics and optimmization from Python
[EMAIL PROTECTED] wrote: I use Python to generate a huge amount of data in a .csv file which I then process using Excel. In particular, I use Excel's solver to solve a number of non-linear equation, and then regress the results of hundreds of calls to Solver against a set of known values, enabling me to calibrate my model. This is a pain: i'd much rather perform all the computations in Python and improve on Excels' regression as well. Questions: 1. Is there a way to perform (or make a call to) a non-linear optimization from Python? Look at scipy. http://www.scipy.org In [1]: from scipy import optimize In [2]: optimize? ... Optimization Tools == A collection of general-purpose optimization routines. fmin-- Nelder-Mead Simplex algorithm (uses only function calls) fmin_powell -- Powell's (modified) level set method (uses only function calls) fmin_cg -- Non-linear (Polak-Rubiere) conjugate gradient algorithm (can use function and gradient). fmin_bfgs -- Quasi-Newton method (can use function and gradient) fmin_ncg-- Line-search Newton Conjugate Gradient (can use function, gradient and hessian). leastsq -- Minimize the sum of squares of M equations in N unknowns given a starting estimate. Constrained Optimizers (multivariate) fmin_l_bfgs_b -- Zhu, Byrd, and Nocedal's L-BFGS-B constrained optimizer (if you use this please quote their papers -- see help) fmin_tnc -- Truncated Newton Code originally written by Stephen Nash and adapted to C by Jean-Sebastien Roy. fmin_cobyla -- Contrained Optimization BY Linear Approximation 2. Do Python packages for robust statistics (robust regression in particular) exist. If so, which one would you recommend/ Offhand, I can't think of any, but it's easy enough to do maximum likelihood with Laplacians and the functions above. If you find suitable FORTRAN or C code that implements a particular robust algorithm, it can probably wrapped for scipy relatively easily. -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: trictionary?
Adam Tomjack wrote:
I'd write it like this:
bin = {}
for start, end, AS, full in heard:
week = int((start-startDate)/aWeek)
counters = bin.setdefault(week, [0, 0])
if full:
counters[0] += 1
else:
counters[1] += 1
for week, (times_full, times_not_full) in bin.iteritems():
print ...
Seriously, use setdefault() as often as you can. It may be a little
awkward at first, but after a little bit, you instantly know what it
means. It takes out a whole if/else statement which will make your code
smaller and more readable at the same time.
However, you should be aware that it can make your code slower. If the
default value is expensive to create,
value = dct.setdefault(key, expensive_func())
will often be slower and/or more memory intensive than
try:
value = dct[key]
except KeyError:
value = expensive_func()
or
if key in dct:
value = dct[key]
else:
value = expensive_func()
Personally, I waver back and forth between using setdefault. It's kind
of handy, but it never reads quite right. While I've used it often
enough to grok it pretty quickly, it's still consumes more of my mental
processing than some other approaches.
I also tend to agree with the assessment[1] (I believe due to Raymond
Hettinger) that setdefault is poorly designed, and should instead set a
default value for the entire dictionary, e.g. so that you could do:
counts = {}
counts.setdefault(value=0)
for elem in data:
counts[elem] += 1
Unfortunately, this is pretty badly backwards incompatible, so I can
only really hope for this change in Python 3.0 which is still a number
of years off.
STeVe
[1]http://wiki.python.org/moin/Python3%2e0Suggestions#head-b384410f8b2dc16fd74c9eec764680e428643d73
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Re: overload builtin operator
Iain King wrote: Robert Kern wrote: You have silly users. You mean you don't? Damn. Can I have some of yours? No, you may not. Mine! All mine! -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Python port on Palm Treo?
Has anyone done or worked on a port of Python to the Treo? -- http://mail.python.org/mailman/listinfo/python-list
Re: trictionary?
[EMAIL PROTECTED] wrote:
import csv
temp1 = []
temp2 = []
reader = csv.reader(file(rpy_monsters.csv))
for rec in reader:
temp1.append(rec)
for i in temp1[1:]:
temp2.append((i[0],dict(zip(temp1[0][1:],i[1:]
monsters = dict(temp2)
I would tend to write this as:
import csv
reader = csv.reader(file(rpy_monsters.csv))
labels = reader.next()[1:]
monsters = dict((row[0], dict(zip(labels, row[1:])))
for row in reader)
which I believe gives equivalent output:
py csv_text = \
...
name,hardiness,agility,friend,courage,room,weight,special_def_odds,armor,weapon,odds,dice,side,hits,reaction,desc
... PIRATE,5,20,0,10,26,300,0,0,11,60,1,10,0,not met,You see a man
with a beard and a brass ring in his ear. He is wearing clothes made
of silk and is wielding a very fancily engraved sword.
py f = StringIO.StringIO(csv_text)
py reader = csv.reader(f)
py labels = reader.next()[1:]
py monsters = dict((row[0], dict(zip(labels, row[1:])))
... for row in reader)
py monsters
{'PIRATE': {'reaction': 'not met', 'agility': '20', 'room': '26',
'weight': '300', 'armor': '0', 'weapon': '11', 'hits': '0', 'side':
'10', 'special_def_odds': '0', 'courage': '10', 'hardiness': '5',
'desc': 'You see a man with a beard and a brass ring in his ear. He is
wearing clothes made of silk and is wielding a very fancily engraved
sword.', 'odds': '60', 'friend': '0', 'dice': '1'}}
STeVe
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Re: Jargons of Info Tech industry
John Bokma wrote: T Beck [EMAIL PROTECTED] wrote: [snip] alongside of it. The internet is a free-flowing evolving place... to try to protect one little segment like usenet from ever evolving is just ensuring it's slow death, IMHO. And if so, who cares? As long as people hang out on Usenet it will stay. Does Usenet need al those extra gimmicks? To me, it would be nice if a small set would be available. But need? No. The death of Usenet has been predicted for ages. And I see only more and more groups, and maybe more and more people on it. As long as people who have to say something sensible keep using it, it will stay. I suppose I was (as many people on the internet have a bad habit of doing) being more caustic than was strictly necessary. I don't really forsee the death of usenet anytime soon, I just don't think the idea of it evolving is necessarily bad. I don't really have alot of vested interest one way or the other, to be honest, and I'm perfectly happy with the way it is. I just think it's a naive view to presume it never will change, because change is what the internet as a whole was built on. I think I'll calmly butt out now ^_^ -- T Beck -- http://mail.python.org/mailman/listinfo/python-list
socket.gaierror from httplib
this code
h=httplib.HTTPConnection('euronext.com')
h.request('GET',
'http://www.euronext.com/home/0,3766,1732,00.html')
fails with this message
File httplib.py, line 532, in connect
socket.SOCK_STREAM):
socket.gaierror: (-2, 'Name or service not known')
what am i doing wrong?
thanks
eric
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Re: using common lisp with python.
basically, what I'm looking to do is use python as a bridge between C and Common Lisp to create a virtual city that contains Artificial life. -- http://mail.python.org/mailman/listinfo/python-list
Re: trictionary?
Randy Bush wrote: Steven Bethard wrote: It would probably help if you explained what the real problem is you're trying to solve. actually, that code fragment was meant to do that. it's pretty much what i needed to do at that point, just the variable names made simple. Yeah, I gathered that. Sometimes though, you may not ever need to get to that point if the surrounding code can be properly reorganized. But I can't tell if that's possible unless you explain what the goal of the program is, not just how your current code tries to approach that goal. So I'm going to try to pump you for a little more information here. Is your goal to count, for each week, how many times it's full and how many times it's not full? What do you use the counts for? What does full mean? Is it always a 0 or 1? What's the importance of the output formatting? so, to do this using the real names, it looks like for [start, end, AS, full] in heard: week = int((start-startDate)/aWeek) if week in bin: if full: bin[week][0] += 1 else: bin[week][1] += 1 else: if full: bin[week] = [1, 0] else: bin[week] = [0, 1] ... for i, (j, k) in bin.iteritems(): if j == 0: print str(i) + ,, + str(k) elif k == 0: print str(i) + , + str(j) else: print str(i) + , + str(j) + , + str(k) For the current code, I'd probably go with something like: for start, end, AS, full in heard: week = int((start-startDate)/aWeek) if week in bin: bin[week][not full] += 1 else: # I'm assuming full takes the values 0 or 1 # but if not, you can coerce it with bool() bin[week] = [full, int(not full)] ... for i, (j, k) in bin.iteritems(): result = [str(i), j and str(j) or ''] # special-case k because if it's zero, the reference # code drops a comma if k: result.append(str(k)) print ','.join(result) But if you're just trying to count the number of times a week is full or not full, I'd probably do something like: for start, end, AS, full in heard: week = int((start-startDate)/aWeek) if week in bin: bin[week].append(full) else: bin[week] = [full] ... for i, fulls in bin.iteritems(): j = sum(fulls) k = len(fulls) - j ... STeVe -- http://mail.python.org/mailman/listinfo/python-list
Re: GIL, threads and scheduling - performance cost
[EMAIL PROTECTED] a écrit : Hi all, Wondering if a GIL lock/unlock causes a re-schedule/contect swap when embedding Python in a multi-threaded C/C++ app on Unix ? If so, do I have any control or influence on this re-scheduling ? The app suffers from serious performance degradation (compared to pure c/C++) and high context switches that I suspect the GIL unlocking may be aggravating ? Well, where do you observe this degradation ? When replacing part of the C++ code by Python's code ? Or on C++ code running parallel to your Python code ? Because in the first case, well, this is just something natural ! Python runtime overhead is much greater than C++ because of its dynamic nature (it has to resolve all the symbols at runtime ...). And given the policy for locking/releasing the GIL, I doubt it has serious performance issues compared to the Python interpreter itself. If current performance is an issue, consider implementing more in C/C++ ! This will be mainly true if you currently have some heavy looping in Python. Python is very neat to put together processor-intensive functions written in other languages, but not to implement them. (as an exemple looh at that: http://www.python.org/doc/essays/list2str.html ) Thanks for any help. Alan Pierre -- http://mail.python.org/mailman/listinfo/python-list
Re: GIL, threads and scheduling - performance cost
Merci Pierre, Yes I agree and plan to move more to C/C++ and releasing the GIL when entering C/C++. I also need to understand my original question re GIL and rescheduling. I fear that lock/unlock too often is also causing delays due to context switching. BTW do you have any hints/comments on SWIG/BOOST etc to glue PY and C/C++ ? Alan -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
Why on earth was this cross-posted to comp.lang.c.? Followups set. On Mon, 29 Aug 2005 12:26:11 GMT, [EMAIL PROTECTED] wrote: In comp.lang.perl.misc Mike Meyer [EMAIL PROTECTED] wrote: [EMAIL PROTECTED] writes: In comp.lang.perl.misc John Bokma [EMAIL PROTECTED] wrote: Chris Head [EMAIL PROTECTED] wrote: What advantages would those be (other than access from 'net cafes, but see below)? And workplaces. Some people have more then one computer in the house. My partner can check her email when I had her over the computer. When I want to check my email when she is using it, I have to change the session, fire up Thunderbird (which eats away 20M), and change the session back. Not a Windows solution, but I find the 'screen' utility invaluable as I can have my email, news, and an editor open in different screens and then when I need to move to a different machine, I can simply detach and reattach screen without disturbing anything that might be running. For a more portable solution, check out VNC. I know... but it is a bugger to set up and I believe it is no longer freeware (if it ever was), and it does not have the stark simplicity which screen has... I only need to have a compiled version of screen on the machine on which I do most of my work and be able to ssh/telnet to that machine without involving any additional software installations on other machines. Axel -- Al Balmer Balmer Consulting [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
Hi, I'd advocate for using SAX, as DOM related methods implies loading the complete XML content in memory whereas SAX grab things on the fly. SAX method should therefore be faster and less memory consuming... By the way, if your goal is to just combine the text out of page:title and page:revision:text for every single page element, maybe you should also consider an XSLT filter. Regards, Thierry -- http://mail.python.org/mailman/listinfo/python-list
Re: Robust statistics and optimmization from Python
Robert Kern wrote: snip If you find suitable FORTRAN or C code that implements a particular robust algorithm, it can probably wrapped for scipy relatively easily. An alternative would be to call R (a free statistical package) from Python, using something like the R/SPlus - Python Interface at http://www.omegahat.org/RSPython/ . Many statistical algorithms, including those for robust statistics, have been implemented in R, usually by wrapping C or Fortran 77 code. -- http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
On 29 Aug 2005 08:17:04 -0700 jog [EMAIL PROTECTED] wrote: I want to get text out of some nodes of a huge xml file (1,5 GB). The architecture of the xml file is something like this [structure snipped] I want to combine the text out of page:title and page:revision:text for every single page element. One by one I want to index these combined texts (so for each page one index) What is the most efficient API for that?: SAX ( I don´t thonk so) DOM or pulldom? Definitely SAX IMHO, or xml.parsers.expat. For what you're doing, an event-driven interface is ideal. DOM parses the *entire* XML tree into memory at once, before you can do anything - highly inefficient for a large data set like this. I've never used pulldom, it might have potential, but from my (limited and flawed) understanding of it, I think it may also wind up loading most of the file into memory by the time you're done. SAX will not build any memory structures other than the ones you explicitly create (SAX is commonly used to build DOM trees). With SAX, you can just watch for any tags of interest (and perhaps some surrounding tags to provide context), extract the desired data, and all that very efficiently. It took me a bit to get the hang of SAX, but once I did, I haven't looked back. Event-driven parsing is a brilliant solution to this problem domain. Or should I just use Xpath somehow. XPath usually requires a DOM tree on which it can operate. The Python XPath implementation (in PyXML) requires DOM objects. I see this as being a highly inefficient solution. Another potential solution, if the data file has extraneous information: run the source file through an XSLT transform that strips it down to only the data you need, and then apply SAX to parse it. - Michael -- http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
jog wrote: I want to get text out of some nodes of a huge xml file (1,5 GB). The architecture of the xml file is something like this I want to combine the text out of page:title and page:revision:text for every single page element. One by one I want to index these combined texts (so for each page one index) here's one way to do it: try: import cElementTree as ET except ImportError: from elementtree import ElementTree as ET for event, elem in ET.iterparse(file): if elem.tag == page: title = elem.findtext(title) revision = elem.findtext(revision/text) print title, revision elem.clear() # won't need this any more references: http://effbot.org/zone/element-index.htm http://effbot.org/zone/celementtree.htm (for best performance) http://effbot.org/zone/element-iterparse.htm /F -- http://mail.python.org/mailman/listinfo/python-list
Re: trictionary?
bin = {}
for start, end, AS, full in heard:
week = int((start-startDate)/aWeek)
counters = bin.setdefault(week, [0, 0])
if full:
counters[0] += 1
else:
counters[1] += 1
yes! thanks!
Using an idea you used earlier, you could get smaller code by saying:
for start, end, AS, full in heard:
week = int((start-startDate)/aWeek)
counters = bin.setdefault(week, [0, 0])
counters[not full] += 1
Or
for start, end, AS, full in heard:
week = int((start-startDate)/aWeek)
bin.setdefault(week, [0, 0])[not full] += 1
Or even
for start, end, AS, full in heard:
bin.setdefault(int((start-startDate)/aWeek), [0, 0])[not full] += 1
as you say, too clever.
Using lists to represent structs is perfectly fine if the list doesn't
live longer than about one screen of code.
i can definitely see that. in last weeks installment, i buried a
complex trinary tree in a class.
thanks for the advice!
randy
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Re: GIL, threads and scheduling - performance cost
[EMAIL PROTECTED] a écrit : Merci Pierre, Yes I agree and plan to move more to C/C++ and releasing the GIL when entering C/C++. I also need to understand my original question re GIL and rescheduling. I fear that lock/unlock too often is also causing delays due to context switching. Well, concerning GIL and rescheduling, releasing a lock is very likely to induce rescheduling and context switch, but it won't if the system considers it worthless. But this is true that lock/unlock has a cost and so, doing it too much will slow down your app. BTW do you have any hints/comments on SWIG/BOOST etc to glue PY and C/C++ ? Well, for C I would recommand SWIG. For C++, I personnaly use Boost.Python. However, you must know that SWIG did not support C++ well when I had to choose between the two, so there was no question for me. Then, somehow it depends on how you feel with the tools: SWIG depends on a specific language and has its own tools while Boost is entirely written in C++ and uses heavily templates. For performances, Boost generate better code that SWIG, mainly because SWIG relies on Python code that encapsulate the actual C functions while Boost does everything in C++. Also, at least with G++, compiling Boost extension is very time- and memory-consuming due to its heavy use of templates. As I don't use SWIG, I don't know about the community, but at least for Boost.Python it is quite active and questions on the mailing list are answered quickly enough. Well, this is very quick but if you need more detailed information, I recommend you to visit both websites. Alan Pierre -- http://mail.python.org/mailman/listinfo/python-list
Re: Bug in string.find; was: Re: Proposed PEP: New style indexing,was Re: Bug in slice type
Antoon Pardon wrote: I think a properly implented find is better than an index. See the current thread in python-dev[1], which proposes a new method, str.partition(). I believe that Raymond Hettinger has shown that almost all uses of str.find() can be more clearly be represented with his proposed function. STeVe [1]http://mail.python.org/pipermail/python-dev/2005-August/055781.html -- http://mail.python.org/mailman/listinfo/python-list
ANN: PyDev 0.9.8 released
Hi All, PyDev - Python IDE (Python Development Enviroment for Eclipse) version 0.9.8 has just been released. Check the homepage (http://pydev.sourceforge.net/) for more details. Details for Release: 0.9.8 Major highlights: --- * Jython integrated. * Jython debugger support added. Others that are new and noteworthy: - * jython integration supports spaces for jython.jar and java install * jython code-completion support for new style objects (jython 2.2a1) has been enhanced. * many templates were added * the grammar evolved a lot, so, now you actually have decorators in the grammar, list comprehension on method calls and tuples and the new from xxx import (a,b,c) syntax. * pylint supports spaces * pylint is no longer distributed with pydev (it must be installed in the site-packages and its location must be specified in the preferences) * some problems regarding 'zombie processes' after eclipse exit with the shells used for code-completion should be fixed Special thanks --- This release would not be possible without help from: OctetString, for the financial support for making jython support possible! Vitor Oba for debugger patches! Cheers, Fabio -- Fabio Zadrozny -- Software Developer ESSS - Engineering Simulation and Scientific Software www.esss.com.br PyDev - Python Development Enviroment for Eclipse pydev.sf.net pydev.blogspot.com -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
On Fri, 26 Aug 2005 16:47:10 GMT, Chris Head [EMAIL PROTECTED] wrote: This point I agree with. There are some situations - 'net cafes included - - where thick e-mail clients don't work. Even so, see below. I use Portable Thunderbird, on a USB memory stick. All I need is a USB port and an internet connection. -- Al Balmer Balmer Consulting [EMAIL PROTECTED] -- http://mail.python.org/mailman/listinfo/python-list
Exploring outlook contents
Hi, I am trying to build an application to explore the contents of an outlook .pst files. All the reference that I have seen uses the registry to do so. Does any one know any other way of doing this. Also, is anyone has any code which does something related to this, please let me know. -Subir -- http://mail.python.org/mailman/listinfo/python-list
Re: trictionary?
So I'm going to try to pump you for a little more information here. Is your goal to count, for each week, how many times it's full and how many times it's not full? What do you use the counts for? What does full mean? Is it always a 0 or 1? What's the importance of the output formatting? 'full' is boolean. it says whether a particular bgp announcement was for the entire ip address allocation, or is a longer prefix. e.g., if an allocation was for 666.42.0.0/16 and we heard a bgp announcement for 666.42.1.0/24 that is !full, while an announcement for the prefix 666.42.0.0/16 is full. you asked :-) for start, end, AS, full in heard: week = int((start-startDate)/aWeek) if week in bin: bin[week][not full] += 1 else: # I'm assuming full takes the values 0 or 1 # but if not, you can coerce it with bool() bin[week] = [full, int(not full)] hmmm. this also reads well. as an old pascal and modula-2 bondage and discipline type, i gotta say is it a breath of fresh air to be in a language and community which care about how code reads more than how clever it is. randy -- http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
[jog]
I want to get text out of some nodes of a huge xml file (1,5 GB). The
architecture of the xml file is something like this
[snip]
I want to combine the text out of page:title and page:revision:text
for every single page element. One by one I want to index these
combined texts (so for each page one index)
What is the most efficient API for that?:
SAX ( I don´t thonk so)
SAX is perfect for the job. See code below.
DOM
If your XML file is 1.5G, you'll need *lots* of RAM and virtual memory
to load it into a DOM.
or pulldom?
Not sure how pulldom does it's pull optimizations, but I think it
still builds an in-memory object structure for your document, which will
still take buckets of memory for such a big document. I could be wrong
though.
Or should I just use Xpath somehow.
Using xpath normally requires building a (D)OM, which will consume
*lots* of memory for your document, regardless of how efficient the OM is.
Best to use SAX and XPATH-style expressions.
You can get a limited subset of xpath using a SAX handler and a stack.
Your problem is particularly well suited to that kind of solution. Code
that does a basic job of this for your specific problem is given below.
Note that there are a number of caveats with this code
1. characterdata handlers may get called multiple times for a single xml
text() node. This is permitted in the SAX spec, and is basically a
consequence of using buffered IO to read the contents of the xml file,
e.g. the start of a text node is at the end of the last buffer read, and
the rest of the text node is at the beginning of the next buffer.
2. This code assumes that your revision/text nodes do not contain
mixed content, i.e. a mixture of elements and text, e.g.
revisiontextThis is a piece of brevision/b
text/text/revision. The below code will fail to extract all
character data in that case.
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
import xml.sax
class Page:
def append(self, field_name, new_value):
old_value =
if hasattr(self, field_name):
old_value = getattr(self, field_name)
setattr(self, field_name, %s%s % (old_value, new_value))
class page_matcher(xml.sax.handler.ContentHandler):
def __init__(self, page_handler=None):
xml.sax.handler.ContentHandler.__init__(self)
self.page_handler = page_handler
self.stack = []
def check_stack(self):
stack_expr = / + /.join(self.stack)
if '/parent/page' == stack_expr:
self.page = Page()
elif '/parent/page/title/text()' == stack_expr:
self.page.append('title', self.chardata)
elif '/parent/page/revision/id/text()' == stack_expr:
self.page.append('revision_id', self.chardata)
elif '/parent/page/revision/text/text()' == stack_expr:
self.page.append('revision_text', self.chardata)
else:
pass
def startElement(self, elemname, attrs):
self.stack.append(elemname)
self.check_stack()
def endElement(self, elemname):
if elemname == 'page' and self.page_handler:
self.page_handler(self.page)
self.page = None
self.stack.pop()
def characters(self, data):
self.chardata = data
self.stack.append('text()')
self.check_stack()
self.stack.pop()
testdoc =
parent
page
titlePage number 1/title
idp1/id
revision
idr1/id
textrevision one/text
/revision
/page
page
titlePage number 2/title
idp2/id
revision
idr2/id
textrevision two/text
/revision
/page
/parent
def page_handler(new_page):
print New page
print title\t\t%s % new_page.title
print revision_id\t%s % new_page.revision_id
print revision_text\t%s % new_page.revision_text
print
if __name__ == __main__:
parser = xml.sax.make_parser()
parser.setContentHandler(page_matcher(page_handler))
parser.setFeature(xml.sax.handler.feature_namespaces, 0)
parser.feed(testdoc)
#-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
HTH,
--
alan kennedy
--
email alan: http://xhaus.com/contact/alan
--
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Re: Newbie question: Sub-interpreters for CAD program
On Sat, 27 Aug 2005 16:56:03 -0500, Terry Hancock [EMAIL PROTECTED] wrote: On Saturday 27 August 2005 03:21 am, David MacQuigg wrote: There is a similar lack of interest in the academic community. None of this is likely to lead to publications in scholarly journals. I'm confused by what you meant by this. Are you saying that academics are afraid of using or creating open source CAD tools, or that they have a lack of interest in tools development, because it won't generate papers (directly anyway)? It seems like a lack of interest in tools development, because there are no new fundamental principles, sophisticated math, or anything that could help directly and in the short term to get a publication. There is probably also a perception, shared with engineers in industry, that the complexity of these tools is inherent in the task. It's OK for a full-time engineer to spend a few months learning the intricacies of a poorly-designed scripting language that works with just one tool, but not appropriate for students. My hope is that we can get a few good projects to demonstrate the utility of Python in doing sophisticated designs with simple tools. Then we will have a foothold in the Universities. Next will be small companies that can't afford a CAD department with 10 engineers dedicated to tool setup. -- Dave -- http://mail.python.org/mailman/listinfo/python-list
Re: Newbie question: Sub-interpreters for CAD program
On 27 Aug 2005 17:00:07 -0700, sonicSpammersGoToHellSmooth [EMAIL PROTECTED] wrote: Cool, I went to the UofA for my MS in ECE, 2000. I did my theses under Chuck Higgins. -- http://neuromorph.ece.arizona.edu/pubs/ma_schwager_msthesis.pdf The tools we had were constantly underwhelming me, so I've been thinking for years that a properly designed new toolset for students should be marketable, etc. I'll take a look at your site (although I think I may have come across it before.) A toolset for students is exactly what we need. Whether that turns into a marketable product is a question for later. At this point, we need a few people with a strong motivation to help students. Sounds like you might have what it takes. Send me an email if you are interested. -- Dave -- http://mail.python.org/mailman/listinfo/python-list
command history behavior in windows and linux
Does someone know if there is a setting in the python Unix world to make the command history behave as it does in the Windows intepreter? Specifically, I like the fact that the command history remembers which of a sequence of commands is the one that I last issued. For example, suppose that I typed the following lines into the interpreter: import foo for e in foo.container: print e In Unix, I would have to tap up arrow 3 times for each line: up up up gives me import foo. I press enter. up up up gives me for I press enter. up up up gives meprint I press enter. In Windows, I get this behavior I like better: up up up gives me import foo. I press enter. down gives me for I press enter. down gives meprint I press enter. How do I get the second behavior to take place in all the platforms I use? Also, the windows version remembers my commands across sections. How do I enable that in the python version? I tried editing the inputrc file that controls the readline library by adding the following lines: $if python set history-preserve-point on $endif but this did not seem to work. TIA, Leo. -- http://mail.python.org/mailman/listinfo/python-list
Re: using common lisp with python.
Your best bet is probably to look into your LISP environment's FFI (Foreign Function Interface). Most LISP environments have some way to call C code directly. Insofar as going back the other way... that I'm a little more sketchy on. Guile (the Scheme compiler from GNU) is a strong contender, though. It's not Common LISP, but it's a LISP with copious documentation for how to call it from C. I really can't see a reason to use Python as a glue layer. I'd recommend rewriting your LISP code in Python before I'd recommend using Python to interface between Common LISP and C. -- http://mail.python.org/mailman/listinfo/python-list
Re: using common lisp with python.
[EMAIL PROTECTED] wrote: Your best bet is probably to look into your LISP environment's FFI (Foreign Function Interface). Most LISP environments have some way to call C code directly. Insofar as going back the other way... that I'm a little more sketchy on. Guile (the Scheme compiler from GNU) is a strong contender, though. It's not Common LISP, but it's a LISP with copious documentation for how to call it from C. ECL might be a good choice for real Common Lisp (more or less). http://ecls.sourceforge.net/ I really can't see a reason to use Python as a glue layer. I'd recommend rewriting your LISP code in Python before I'd recommend using Python to interface between Common LISP and C. Agreed. -- Robert Kern [EMAIL PROTECTED] In the fields of hell where the grass grows high Are the graves of dreams allowed to die. -- Richard Harter -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
Alan Balmer [EMAIL PROTECTED] wrote: Why on earth was this cross-posted to comp.lang.c.? Followups set. Your reply is even more meaningless and more noise compared to the crosspost. Why? You didn't add anything, you quote an entire message and you just tweaked the follow up to header in a bad way. -- John Small Perl scripts: http://johnbokma.com/perl/ Perl programmer available: http://castleamber.com/ Happy Customers: http://castleamber.com/testimonials.html -- http://mail.python.org/mailman/listinfo/python-list
Re: Jargons of Info Tech industry
Alan Balmer [EMAIL PROTECTED] wrote: On Fri, 26 Aug 2005 16:47:10 GMT, Chris Head [EMAIL PROTECTED] wrote: This point I agree with. There are some situations - 'net cafes included - - where thick e-mail clients don't work. Even so, see below. I use Portable Thunderbird, on a USB memory stick. All I need is a USB port and an internet connection. It's a brave internetcafe that allows such things. (I mean technically one can have a Portable Spam Device :-). -- John Small Perl scripts: http://johnbokma.com/perl/ Perl programmer available: http://castleamber.com/ Happy Customers: http://castleamber.com/testimonials.html -- http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
Alan Kennedy wrote: SAX is perfect for the job. See code below. depends on your definition of perfect... using a 20 MB version of jog's sample, and having replaced the print statements with local variable assignments, I get the following timings: 5 lines of cElementTree code: 7.2 seconds 60+ lines of xml.sax code: 63 seconds (Python 2.4.1, Windows XP, Pentium 3 GHz) /F -- http://mail.python.org/mailman/listinfo/python-list
Re: Cygwin font problems
Steve Holden wrote: Is anyone aware of (a fix for) problems I'm having getting PIL 1.1.5 to create bitmaps using TrueType and openType fonts? When I create an image using the standard PIL fonts everything seems fine, but when I use ImageFont.truetype(font-file, size) no text is drawn. setup.py reports from debug print statements that it's finding freetype21. The same code using (Fredrik's pre-built binary) on Windows runs correctly and produces correct images. Cygwin runs Python 2.4.1, Windows runs 2.4. Any light on this mystery gratefully received. regards Steve Could PIL have been compiled without freetype support perhaps? -- Robin Becker -- http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
[Alan Kennedy] SAX is perfect for the job. See code below. [Fredrik Lundh] depends on your definition of perfect... Obviously, perfect is the eye of the beholder ;-) [Fredrik Lundh] using a 20 MB version of jog's sample, and having replaced the print statements with local variable assignments, I get the following timings: 5 lines of cElementTree code: 7.2 seconds 60+ lines of xml.sax code: 63 seconds (Python 2.4.1, Windows XP, Pentium 3 GHz) Impressive! At first, I thought your code sample was building a tree for the entire document, so I checked the API docs. It appeared to me that an event processing model *couldn't* obtain the text for the node when notified of the node: the text node is still in the future. That's when I understood the nature of iterparse, which must generate an event *after* the node is complete, and it's subdocument reified. That's also when I understood the meaning of the elem.clear() call at the end. Only the required section of the tree is modelled in memory at any given time. Nice. There are some minor inefficiencies in my pure python sax code, e.g. building the stack expression for every evaluation, but I left them in for didactic reasons. But even if every possible speed optimisation was added to my python code, I doubt it would be able to match your code. I'm guessing that a lot of the reason why cElementTree performs best is because the model-building is primarily implemented in C: Both of our solutions run python code for every node in the tree, i.e. are O(N). But yours also avoids the overhead of having function-calls/stack-frames for every single node event, by processing all events inside a single function. If the SAX algorithm were implemented in C (or Java) for that matter, I wonder if it might give comparable performance to the cElementTree code, primarily because the data structures it is building are simpler, compared to the tree-subsections being reified and discarded by cElementTree. But that's not of relevance, because we're looking for python solutions. (Aside: I can't wait to run my solution on a fully-optimising PyPy :-) That's another nice thing I didn't know (c)ElementTree could do. enlightened-ly'yrs, -- alan kennedy -- email alan: http://xhaus.com/contact/alan -- http://mail.python.org/mailman/listinfo/python-list
python and ajax
Hi, I was wondering if anybody knew of any good tutorial/example of AJAX/xmlhttprequest in python. Thanks. -Steve Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs -- http://mail.python.org/mailman/listinfo/python-list
Re: Exploring outlook contents
Subir wrote: Hi, I am trying to build an application to explore the contents of an outlook .pst files. All the reference that I have seen uses the registry to do so. Does any one know any other way of doing this. Also, is anyone has any code which does something related to this, please let me know. -Subir Check this out: http://www.boddie.org.uk/python/COM.html HTH -- http://mail.python.org/mailman/listinfo/python-list
Re: python and ajax
Hi ! Here : http://wikipython.flibuste.net/moin.py/AJAX @-salutations Michel Claveau -- http://mail.python.org/mailman/listinfo/python-list
Re: python image thumbnail generator?
Fredrik Lundh [EMAIL PROTECTED] writes: You could do it with PIL, or run jpegtran in an external process. jpegtran may be easier. eh? are you sure you know what jpegtran does? JPEGTRAN(1) Whoops, sorry, right, jpegtran is for rotating the images. I meant: use a pipeline like djpeg -scale 1/4 | cjpeg That's how I usually do it. Main disadvantage is the scale factor has to be 1/2, 1/4, 1/8, etc., not arbitrary amounts like 0.3456. -- http://mail.python.org/mailman/listinfo/python-list
Re: Robust statistics and optimmization from Python
use R. it's pretty highend, and there is an interface for python. -- http://mail.python.org/mailman/listinfo/python-list
Basic Server/Client socket pair not working
Hi there,
I'm trying to write a simple server/client example. The client should be able
to send text to the server and the server should distribute the text to all
connected clients. However, it seems that only the first entered text is sent
and received. When I then get prompted for input again and press return,
nothing gets back to me. Any hints on what I have done would be very much
appreciated!
Here's my code:
SERVER ##
import socket
import select
mySocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mySocket.bind(('', 1))
mySocket.listen(1)
clientlist = []
while True:
connection, details = mySocket.accept()
print 'We have opened a connection with', details
clientlist.append(connection)
readable = select.select(clientlist, [], [])
msg = ''
for i in readable[0]:
while len(msg) 1024:
chunk = i.recv(1024 - len(msg))
msg = msg + chunk
for i in clientlist:
totalsent = 0
while totalsent 1024:
sent = i.send(msg)
totalsent = totalsent + sent
## CLIENT
import socket
import select
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.connect((127.0.0.1, 1))
while True:
text = raw_input(Du bist an der Reihe)
text = text + ((1024 - len(text)) * .)
totalsent = 0
while totalsent len(text):
sent = socket.send(text)
totalsent = totalsent + sent
msg = ''
while len(msg) 1024:
chunk = socket.recv(1024 - len(msg))
msg = msg + chunk
print msg
--
http://mail.python.org/mailman/listinfo/python-list
Re: Virtual Slicing
Sybren Stuvel wrote: Bryan Olson enlightened us with: I recently wrote a module supporting value-shared slicing. Maybe I'm dumb, but could you explain this concept? Why would someone whant this? My original motivation was reduce the amount of copying in some tools that parse nested structures. All I really needed at the time was a reference to a string, and the start and stop values. Once I adopted Python's sequence interface, I thought I might as well implement it consistently, generally, and completely. So the first reason someone might want this is for efficiency, in space and/or time. The second reason is more abstract. Python's slice assignment is a useful feature, but the slice selection must appear on the right-hand-side of assignment. VSlice lets one instantiate the updatable slice as an object, and pass it around. I looked into supporting slice assignment between slices of different sizes when possible, but the various options I came up with all sucked. -- --Bryan -- http://mail.python.org/mailman/listinfo/python-list
Re: python image thumbnail generator?
Chris Dewin wrote: Hi. I run a website for my band, and the other guys want an image gallery. I'm thinking it would be nice and easy, if we could just upload a jpg into a dir called gallery/. When the client clicks the gallery link, a cgi script could search the gallery/ dir, and create thumbnails of any jpeg images that don't already have a thumbnail associated with them. The script could then generate a page of clickable thumbnails. Once I made an example mod_python handler, that resized images on the fly. For example: http://server/folder/image.jpg - would give you the original image, served directly by apache without any performance hit. http://server/folder/image.jpg?thumbnail - would resize the picture (and cache the result on disk) and return that, on a second request it would return the cached image very fast by calling an apache.send_file function. see http://www.modpython.org/pipermail/mod_python/2004-September/016471.html -- damjan -- http://mail.python.org/mailman/listinfo/python-list
Re: global interpreter lock
Mike Meyer wrote: Bryan Olson writes: phil hunt wrote: What's important is *predictability*, e.g. which instruction will the computer execute next? If you only have one thread, you can tell by looking at the code what gets executed next. It's very simple. Not really. Trivially, an 'if' statement that depends upon input data is statically predictable. Use of async I/O means makes the programs execution dependent upon external timing. Yes, but that depenency is tied to a single point - the select call. The paths after that are statically predictable. This makes the code very managable. Wow -- I could not disagree more. Returning back to some single point for every possibly-blocking operation is painful to manage even for simple GUIs, and humanly intractable for sophisticated services. Select is certainly useful, but it scales badly and isn't as general as better tools. [...] I'm calling the tools available in most programming languages for dealing with it primitive. We need better tools. Agreed, but if 'select' is someone's idea of the state of the art, they have little clue as to the tools already available. Bringing the tools to Python remains a bit of challenge, largely because so many Pythoners are unaware. -- --Bryan -- http://mail.python.org/mailman/listinfo/python-list
Re: NooB Question
APCass wrote: How do you execute a .py in Linux with KDE? If I double click on my program it opens Kwrite, for editing. Try inserting this as the first line of the file: #!/usr/bin/env python -- http://mail.python.org/mailman/listinfo/python-list
Re: Basic Server/Client socket pair not working
Michael Goettsche wrote:
Hi there,
I'm trying to write a simple server/client example. The client should be able
to send text to the server and the server should distribute the text to all
connected clients. However, it seems that only the first entered text is sent
and received. When I then get prompted for input again and press return,
nothing gets back to me. Any hints on what I have done would be very much
appreciated!
Here's my code:
SERVER ##
import socket
import select
mySocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
mySocket.bind(('', 1))
mySocket.listen(1)
clientlist = []
while True:
connection, details = mySocket.accept()
print 'We have opened a connection with', details
clientlist.append(connection)
readable = select.select(clientlist, [], [])
msg = ''
for i in readable[0]:
for i in readable:
while len(msg) 1024:
chunk = i.recv(1024 - len(msg))
msg = msg + chunk
for i in clientlist:
totalsent = 0
while totalsent 1024:
sent = i.send(msg)
totalsent = totalsent + sent
## CLIENT
import socket
import select
socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
socket.connect((127.0.0.1, 1))
while True:
text = raw_input(Du bist an der Reihe)
text = text + ((1024 - len(text)) * .)
totalsent = 0
while totalsent len(text):
sent = socket.send(text)
totalsent = totalsent + sent
msg = ''
while len(msg) 1024:
chunk = socket.recv(1024 - len(msg))
msg = msg + chunk
print msg
--
http://mail.python.org/mailman/listinfo/python-list
Re: reg email packages work
praba kar wrote:
Dear All,
I am working in web based email system project.
Here I try to build email message
from scratch. I used below code to build email
message
msg = email.MIMEBase('text','html')
msg['Return-Path'] = user+'@'+domain
msg['Date'] = formatdate(localtime=1)
msg['Subject'] = subject
msg['From'] = from_name
msg['To'] = to
msg['Cc'] = cc
msg.set_payload(Body of the email messagge)
fh = os.popen('/bin/sendmail %s'% (eachid),'w')
fh.write(msg.as_string())
fh.close()
This code will build plain email message properly.
But after building the message. If a email user
download this mail through out look express then
this email message will display without any alignment.
If a user type 3 paragraph message
outlook express display as a single line. What
could be problem?. Kindly let me know ASAP
It's obvious you aren't using that EXACT code, because it doesn't
formulate a three-paragraph message. So the bit we really need to see is
how you capture and formulate the argument to set_payload().
regards
Steve
--
Steve Holden +44 150 684 7255 +1 800 494 3119
Holden Web LLC http://www.holdenweb.com/
--
http://mail.python.org/mailman/listinfo/python-list
Re: python xml DOM? pulldom? SAX?
jog [EMAIL PROTECTED] wrote:
Hi,
I want to get text out of some nodes of a huge xml file (1,5 GB). The
architecture of the xml file is something like this
parent
page
titlebla/title
id/id
revision
id/id
textblablabla/text
revision
/page
page
/page
/parent
I want to combine the text out of page:title and page:revision:text for
every single page element. One by one I want to index these combined
texts (so for each page one index)
What is the most efficient API for that?: SAX ( I don?t thonk so) DOM
or pulldom?
Or should I just use Xpath somehow.
I don`t want to do anything else with his xml file afterwards.
I hope someone will understand me.
Thank you very much
Jog
I would use Expat interface from Python, Awk, or even Bash shell. I'm
most familiar with shell interface to Expat, which would go something
like
start() # Usage: start tag att=value ...
{
case $1 in
page) unset title text ;;
esac
}
data() # Usage: data text
{
case ${XML_TAG_STACK[0]}.${XML_TAG_STACK[1]}.${XML_TAG_STACK[2]} in
title.page.*) title=$1 ;;
text.revision.page) text=$1 ;;
esac
}
end() # Usage: end tag
{
case $1 in
page) echo title=$title text=$text ;;
esac
}
expat -s start -d data -e end file.xml
--
William Park [EMAIL PROTECTED], Toronto, Canada
ThinFlash: Linux thin-client on USB key (flash) drive
http://home.eol.ca/~parkw/thinflash.html
BashDiff: Super Bash shell
http://freshmeat.net/projects/bashdiff/
--
http://mail.python.org/mailman/listinfo/python-list
Re: python and ajax
Steve- I recently ported version 1.3 of cpaint to python. Soon after version 2.0 was released and I haven't really looked at it since. The 1.3 stuff was really simple though if you understand cgi, then you just implement a endpoint for your request to call. The javascript side is really the only thing new (might be a little learning if you having done much js). I think that more advanced ajax libraries like dojo or openrico are probably better suited to more complicated ajax use. Though they are more focused on the js frontend stuff. -- http://mail.python.org/mailman/listinfo/python-list
Re: Robust statistics and optimmization from Python
[EMAIL PROTECTED] wrote: Robert Kern wrote: snip If you find suitable FORTRAN or C code that implements a particular robust algorithm, it can probably wrapped for scipy relatively easily. An alternative would be to call R (a free statistical package) from Python, using something like the R/SPlus - Python Interface at http://www.omegahat.org/RSPython/ . Unless you really want to call Python from R (as opposed to calling R from Python), I strongly suggest that you use RPy (http://rpy.sf.net) rather than RSPython. RPy is much easier to install and use and far less buggy than RSPython. Many statistical algorithms, including those for robust statistics, have been implemented in R, usually by wrapping C or Fortran 77 code. Yup, and if you really don't like the extra dependency or extra memory requirements of R and RPy, it is often possible to port the R code back to Python (or Numeric Python), with some effort. Tim C -- http://mail.python.org/mailman/listinfo/python-list
suggestion for Python graphing package, please
I need a graphing library that I can access from within a Tkinter application running on Windows. It needs to be able to draw some *simple* 2D plots, and then output them to a file (e.g. .PNG, .JPG) for inclusion in a HTML-formatted e-mail to interested parties. Many of the packages that I've looked at a) either don't output to a file, or b) are very old (3-5 years), or c) don't run on Windows. I don't actually care if the library itself is written in Python or c++ or something else. Any suggestions? thanks,-- Stewart Midwinter[EMAIL PROTECTED][EMAIL PROTECTED]Skype:midtoadGoogleTalk:midtoadiChatAV:midtoad MSN:midtoadYahoo:midtoadAIM:midtoad1 -- http://mail.python.org/mailman/listinfo/python-list
Re: new line
Kuljo [EMAIL PROTECTED] schrieb im Newsbeitrag news:[EMAIL PROTECTED] Dear friends I'm so sorry to bore you with this trivial problem. Allthou: I have string having 0x0a as new line, but I should have \n instead. How should I solve it? I've tried text_new=tex_old.replace(str(0x0a), '\n') and other things, but none of them worked. Thanks in advance text_new=tex_old.replace(chr(0x0a), '\r\n') works for me. Claudio P.S. str(0x0a) == '10' -- http://mail.python.org/mailman/listinfo/python-list
