🌐 Mailman 3 January 2002 - Python-list - python.org

How to generate XML
by Fabrizio Feb. 14, 2002

Feb. 14, 2002

Does anybody know if there are modules to generate XML? I know there is SAX, but it is only for parsing, isn't it? Thank. Fab

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DBI possibly bogus error message
by Lee Feb. 13, 2002

Feb. 13, 2002

I'm a brand new Python user. I've got Active Python (and Active Perl) installed on my wintel sysem. I'm using the pyperl module to reach perl's DBI and DBD-Oracle modules. I follow the example in dbi2.py (which has an error, in the connect statement by the way,instead of DBI:Oracle:database=blahblah I needed DBI:Oracle:blahblah). After some mucking about, I got an error message "Cant locate Python/Object.pm in @INC (@INC contains: ...<my path to Perl/lig and Perl/site/lib> ) BEGIN failled--compiation aborted After that unpromissing beginning, lo and behold, I see the data I've selected from my oracle table neatly printed out as advertized. Anybody have a clue as to whats going on? Is the error truly bogus? If not, whats the problem and how do I fix it? If so, how do I surpress it? Thanx in advance

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Re: PyFT and PIL
by kern＠myrddin.caltech.edu Feb. 12, 2002

Feb. 12, 2002

In article <mailman.987996754.9967.python-list(a)python.org>, "Chris Gonnerman" <chris.gonnerman(a)usa.net> writes: > Would someone be able to show a working example of PyFT drawing with > "correct" alpha transparency on a PIL pixmap image? This is the main > reason I took over the GD module... I have lots of TrueType fonts and > would like to use them to draw on pictures (i.e. website buttons etc.) > > I could probably figure it out, but I assume someone already has. A > Google search doesn't turn up anything useful (or I'm not doing it > right). Among other reasons, I updated PyFT to handle that gracefully. Because of unavailability of web space for some time, I had only semi-released it. It is now at http://starship.python.net/crew/kernr/source/PyFT-0.65.tar.gz It has a nice class-based wrapper around the nasty function calls. One does essentially the following: >>> f = Font('times', size=12, bold=0, italic=1) >>> rend = BaseRenderer(resolution=(96,96), aa=1) >>> rend.drawString(PIL_image, 'FooBar', x_pos, y_pos, f) and 'FooBar' will be rendered in 12-point, italic Times New Roman onto the PIL Image instance PIL_Image with the appropriate alpha mask. Just set up the font locations correctly at the beginning of the PyFT.py file. I have given up maintenance of PyFT since I've moved onto other things. Steve Alexander has offered to take it over. Of course, someone (not me) should write a new PyFT from scratch to wrap FreeType2. -- Robert Kern kern(a)caltech.edu "In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter

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Fun with lambda and map
by gerson.kurz＠t-online.de Feb. 12, 2002

Feb. 12, 2002

primes = lambda o:map(lambda a:filter(None,(map(lambda i:map(lambda x:a.__setitem__(x,0),range(2*i,o,i)),range(2,o)),a)[1])[1:],[range(o)])[0] print primes(20) fibonacci = lambda x:map(lambda o:(map(lambda c:map(lambda l:o.__setslice__(l[0],l[1],l[2]),([o[2]+3,o[2]+4,[o[0]]],[0,3,[o[1],reduce(lambda x,o:x+o,o[:2]),o[2]+1]])),range(x)),o)[1],[[1,1,0]+range(x)])[0][3:] print fibonacci(20) (Note: These probably need python 2.2 to work because of the lambda scope thing)

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Python IDEs
by Stewart hector Feb. 10, 2002

Feb. 10, 2002

Hi Apart from IDLE, what other good opensource Python IDEs are there that run under Linux? Thanks.

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Re: [gush] ZODB, you rock!
by Andrew Kuchling Feb. 10, 2002

Feb. 10, 2002

Richard Jones <rjones(a)ekit-inc.com> writes: > I've just played with the ZODB in standalone mode (from zodb.sf.net) and it > rocks! Kudos to all the people involved in developing it and then splitting > it from Zope. Note that the StandaloneZODB module in the cvs.zope.org repository is much more up-to-date than the zodb.sf.net code, with lots of bug fixes and 2.2 compatibility changes. As soon as someone at Zope Corp. makes a tarball (hint, hint), I'll be taking my old distribution offline. --amk (www.amk.ca) Do you know he has an excellent brain, that man... though a little pedestrian. But oh dear, what a bore the fellow is! -- The Master, describing the Doctor, in "The Time Monster"

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autocoding project proposal
by Timothy Rue Feb. 9, 2002

Feb. 9, 2002

I'm posting this to this python group because a sample of what is mentioned below is done in python. And wouldn't it cool to have python used in an autocoding development environment? This posting is to introduce or suggest an open source software project to produce a core tool that will allow an autocoding environment to be developed, allowed to evolve in the open source software community and spirit of. I believe we can overcome many of the problems that proprietary autocoding systems inherently have (not to mention that existing autocoding systems appear to be field/domain specific limited and that it may be possible to beat this too.) First: Ghostscript PDF viewers for the following PDF links (if you don't already have a PDF viewer) http://www.cs.wisc.edu/%7Eghost/ The following information represents what is probably the best of what is available thru the Web on the subject of autocoding. (via google) HIRTS DARP Working Group on Autocoding, 18th, 19th April 2000 http://www.cs.york.ac.uk/hise/darp/pdf/autocoding.pdf (Brings up various issues which will help you focus in on what "autocoding" is and what some of the issues to solve, are.) The follow up to the above is: May 8th thru 10th, 2001 "DARP HIRTS Workshop" paper by Jakob Engblom: http://www.artes.uu.se/mobility/reports/hirts_report1.0.pdf (See pages 5-6 section 3.2.5 The Use of Tools in Aerospace) In summary, Though autocoding is being used to some extent, it is a future hope, since in general it has a bug density which is an order of a magnititude lower than manual code. Point being is that this is leading edge stuff, an opportunity for OSS to shine. The above paper mentioned the SCADE autocoding product: http://www.esterel-technologies.com/scade/ (See code generator part of Product overview, Benefits, Toolset Features) Autocoding as it applies to the medical industry: http://www.ahima.org/journal/coding/coding.0110.1.htm (Since it was mentioned in a paper above, know it's a product of a different nature.) To help show why I believe OSS efforts can shine when it comes to such a project as Autocoding: QinetiQ - Analysis of the Impact of Open Source Software http://www.govtalk.gov.uk/interoperability/egif_document.asp?docnum=430 and From the Conference on the Public Domain, Nov. 9-11. 2001 at Duke Law School "Coase's Penguin, or, Linux and the Nature of the Firm" by Yochai Benkler: http://www.law.duke.edu/pd/papers/Coase%27s_Penguin.pdf It is also worth mentioning, to my undersandng, that the GNU efforts are becomming more modular in nature and there is also the Hurd that is modular or componet based from the ground up. This is a consistant and fitting direction in accord with an open autocoding development and use environment. OK, so although this project is not AeroSpace "Mission Critical", it does not hurt to make the quality target of the project to be of such high standards. Actually, what I believe is that the core (as mentioned at the beginning of this post) can be made to be of high quality itself, where the rest, the coding knowledge base or what ever you want to call the pre-autocode dictionary, will be of whatever quality it is created and improved to be (as is the way and spirit of the OSS community.) Where to start? Automating what was done manually requires the identification of, and ability to apply, the manual action set we use, but have the computer do it. A USPTO Published comment introducing these identified actions and suggestions of how they may be applied, including autocoding, is here: http://www.mindspring.com/~timrue/KNMVIC.html The bottom part of my home page regarding the "Virtial Interaction Configuration": http://www.mindspring.com/~timrue/ An older paper on the Virtual Interaction Configuration: http://www.mindspring.com/~timrue/KC.html Why don't I do this shell and/or library myself? I don't consider myself a programmer having the experience and knowledge of better ways of coding somethings and as such I'm sure this core of functionality can be coded better and faster than what I could do, but there is what I have done, and that includes some python programming that can be used and run to show/communicate some of the concepts of the Virtual Interaction Configuration. And I can provide insight as to how it may be used for such things as autocoding. Until recently, this past week, I wasn't aware "autocoding" was an actual goal and practice of anyone, though I have used the term for sever years now, and apparently, given the above HIRTS DARP papers, my perspectives and thoughts on the matter have been along the lines of what's been going on. Though I do believe The VIC as a core can solve some of the problems facing commercial autocoding packages (but this is something to get into later, when I can communicate but showing). Besides the VIC core, there is the pre-automation code base(s) to create for whatever programming language(s) people want to use. And that's something clearly beyond my ability to directly do, at least in the beginning. Besides, there are many other things the VIC can be used for besides autocoding. Consider it a tool for general automation... At any rate I do believe Autocoding is a worthwhile goal that the GNU community can shine at. And I think some of you, in consideration of the HIRTS DARP link contents and the USPTO comment, will too. If interested in helping, email me at mailto:threeseas@earthlink.net If interested in using such a tool, then say so here, let others know.

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Autocoding evolves from........
by Timothy Rue Feb. 8, 2002

Feb. 8, 2002

I'm going to try to explain this tool I've been on about in a mnner of evolution, or start here, add this and why, and then expand that for more power and control.... Start here: We exist (one item) We consume and we produce in this existance (two items - input and output) we can expand on this an break it into three items. input -> processing -> output I can go to the lumber yard and buy some wood and supplys (consume) and take the stuff I bought and make some things with it (process) and then I can sell it or give these things I've made away (output). Simple enough! In a Unixy shell that can be done simply by entering a command (process) on the imput of the command line and getting output to the screen. I input and got output. Using redirection, I input from the lumberstore and process thru my shop and output to the yard sale. %> shop <lumberstore >yardsale Simple enough. Only it's not that easy to do in real life. Sure I can go to the lumber store and sum it up that I got input from teh store. But as someone else said, the devil is in the details. Exactly where all do I get input from (once I get in the store)? I don't just and walk in then out with what all I need. I have to get wood from a rack, nails from a shelf, Glue from another shelf, and paint from off another shelf in another part of the store. That's alot more different inputs than just getting input from the store. THIS is just to show the need to be able to change input direction. So... (changeable input direction) -> processing -> output That is a difference that gives us more control over the input and changing it as needed, to where it is needed. Still all the stuff input from the store gets taken to the shop. There is no need to get just one item and take it to the shop, and repeating it until all items are in teh shop. What that means is that: %> shop <lumberstore >yardsale ...well it doesn't really work that way in real life so why expect someone to do it that way on a computer?! As the input stage can be shown to need greater flexability, so can the output stage be shown the need for it to be more flexable too. (changeable input direction) ->processing-> (changeable output direction) Ok, so WHILE PROCESSING IS GOING ON we can change the input and output directions as needed. This is why the VIC has such ability designed into it. And in the same way of stepping thru what you do in real life, everything designed into the VIC is done so for the reason of providing such versatility so that when it is needed, it is there to use. Fortunately, in dealing with computers, we don't have to use the versatility any where near the amount that we actually use it in real life. But we still do use it and having the versatility available is better than not. For example, in going into the lumber store I have to IDentify the wood and nails and checkout counter, etc... before I know whether or not I need them. But in a computer, I might just be able to take alot of short cuts, like telling the computer to get me everything on my shopping list. Where it would be much quicker at going thru the store inventory list, then my doing it manually walking thru the store. Unfortunately while writting this I've been called back to work. But I hope I have given some insight into what the VIC is and why it is designed the way it is. Perhaps I'll be able to follow up in showing the basic idea of each of the other commands and the why behind expanding on them for more control and versatility. And of course the integration of all of them into a configuration that provides the senergy we experience in reall life in working as a team. There is no magic formula to autocoding or other such seemingly complex things like AI illusions (which is what the turning test is, a test of illusion). What there is, is just the automating of things in a manner consistant with the way we do things in real life. --- *3 S.E.A.S - Virtual Interaction Configuration (VIC) - VISION OF VISIONS!* *~ ~ ~ Advancing How we Perceive and Use the Tool of Computers!* Timothy Rue What's *DONE* in all we do? *AI PK OI IP OP SF IQ ID KE* Email @ mailto:timrue@mindspring.com >INPUT->(Processing)->OUTPUT>v Web @ http://www.mindspring.com/~timrue/ ^<--------<----9----<--------<

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Readline and unwanted filename completion
by Simon Budig Feb. 7, 2002

Feb. 7, 2002

Hi all. Something is broken with the completion of readline: simon@ping-pong:~$ python Python 2.1.1+ (#1, Jan 8 2002, 00:37:12) [GCC 2.95.4 20011006 (Debian prerelease)] on linux2 Type "copyright", "credits" or "license" for more information. >>> import rlcompleter >>> rlcompleter.readline.parse_and_bind ("tab: complete") >>> foo<TAB><TAB> foo.gif foo.txt foo2.gif foobar.jpg >>> foo.gif Traceback (most recent call last): File "<stdin>", line 1, in ? NameError: name 'foo' is not defined [the "foo.gif", "foo.txt", "foo2.gif" and "foobar.jpg" are files in my current working directory] It seems that readline has a fallback to filename completion when no matches are available. Even if I use my own completion function: >>> def nullcompleter (text, state): ... print "\nBuh!" ... return None ... >>> rlcompleter.readline.set_completer(nullcompleter) >>> foo<TAB> Buh! <TAB> Buh! foo.gif foo.txt foo2.gif foobar.jpg foot >>> foo there is this filename fallback. Is this a known Problem? Is there an evil hack to avoid this? Thanks, Simon -- Simon.Budig(a)unix-ag.org http://www.home.unix-ag.org/simon/

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Win32evtlogutil.ReportEvent() - more info please?
by Dale Strickland-Clark Feb. 6, 2002

Feb. 6, 2002

P349 of Python Programming on Win32 explains writing to the event log and mentions that win32evtlog.pyd and win32service.pyd include a set of generic messages. It doesn't seem to explain how to use them. When I register my message source with Win32evtlogutil.AddSourceToRegistry(), what do I use for the MessageDll? Then how do I use one of these generic messages so that the Event Viewer presents logged messages cleanly? Thanks -- Dale Strickland-Clark Riverhall Systems Ltd

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