🌐 Mailman 3 September 2007 - Python-list - python.org

Looking for Delaunay triangulation module...
by Grant Edwards Sept. 2, 2007

Sept. 2, 2007

Can anybody point me to a Delaunay triangulation module (for Win32)? I'm currently using http://flub.stuffwillmade.org/delny/ under Linux, but I have been unable to find a build for Windows. I don't have the tools (or skills) to build libqhull and Pythion extensions on Win32). I've also found the delaunay module in scipy's "sandbox". I could never get that module to work under Linux, and I can't build it for Windows anyway. So for lack of a delaunay module, I'm stuck trying to port my application to Win32. I've spent some time Googling and found various references to pur Python delaunay modules that were abandoned because they were slow (though I haven't been able to find any of the actual modules). Slow is better than none. ;) -- Grant Edwards grante Yow! An air of FRENCH FRIES at permeates my nostrils!! visi.com

4 6

howto reload Python module?
by dmitrey Sept. 2, 2007

Sept. 2, 2007

my Python module was changed in HDD (hardware disk drive), moreover, changed its location (but still present in sys.path). how can I reload a func "myfunc" from the module? (or howto reload whole module)? Thank you in advance, D.

3 2

Pivy problem and some other stuff
by azrael Sept. 2, 2007

Sept. 2, 2007

Hy Guys Did anyone manage to install and use Pivy. I'm trying it and cant come closer to the goal I get the message: Please set the COIN3DDIR environment variable to your Coin root directory! ** Aborting ** Familiar to anyone? And there is anoher question in my mind. Is there a way to make a list in python which contains a series of functions. I did'n try it. Something like: >>>def a(): >>> return 1 >>>def b(): >>> return 2 >>>def c(): >>> return 3 >>>def d(): >>> return 4 >>> list=[a(),b(),c(),d()] >>> list [1,2,3,4] I kow that for this kind of stuff this in not neccesarry, but for other suff it, gets interesting.

5 7

Would like to perform unpaid research work at a CS graduate school or center
by The Eternal Squire Sept. 2, 2007

Sept. 2, 2007

To all, About twenty years ago, I was admitted to a Ph.D. program for computer science. It was also around that time that I was diagnosed for chronic depression, which forced me out of that program into the working word. I had done my best since then as a software engineer, until late 2005, when I was laid off by my most recent workplace. I have now been out of work for 2 years, with no hope of finding anything further. I have been on medication for my depression since 1998, which moderates it somewhat. Until that time the disease has played havoc with my interpersonal and employment relationships, I had always done my best to compensate by immersing myself in the actual work. Most ironically, I am now as strong as I ever was for being a researcher, even more so for my practical experience, and so long as I avoid a punishing work and study load I believe I could do better on a second attempt for a doctorate than I ever did on my first. The problem is obtaining research related references. I would like to find a graduate CS department or university research center that would allow me to perform unpaid research work on a remote basis. I have some interests in parallel computing, from an architecture, programming language, and applications point of view. I will also consider other topics. I hold a bachelor's degree in electrical engineering and a master's degree in computer science, with about 12 to 15 years of practical software experience in systems programming and embedded programming. I also hold an Amateur Extra ticket and have my own electronics laboratory. Please, this is a sincere request. Interested parties please send email to eternalsquire(a)hotmail.com I hold a bachelor's degree in electrical engineering and a master's degree in computer science, with about 12 to 15 years of practical software experience in systems programming and embedded programming. I also hold an Amateur Extra ticket and have my own electronics laboratory. Please, this is a sincere request. Interested parties please send email to eternalsquire(a)hotmail.com I hold a bachelor's degree in electrical engineering and a master's degree in computer science, with about 12 to 15 years of practical software experience in systems programming and embedded programming. I also hold an Amateur Extra ticket and have my own electronics laboratory. Please, this is a sincere request. Interested parties please send email to eternalsquire(a)hotmail.com

1 0

Adding attributes stored in a list to a class dynamically.
by Nathan Harmston Sept. 2, 2007

Sept. 2, 2007

Hi, Sorry if the subject line of post is wrong, but I think that is what this is called. I want to create objects with class Coconuts(object): def __init__(self, a, b, *args, **kwargs): self.a = a self.b = b def spam( l ) return Coconuts( l.a, l.b, l.attributes ) l in a parse line of a file which is a tuple wrapped with attrcol......with attributes a, b and attributes (which is a list of strings in the format key=value ie... [ "id=bar", "test=1234", "doh=qwerty" ] ). I want to add attributes to Coconuts so that I can do print c.id, c.test, c.doh HOwever I m not sure how to do this: how can i assign args, kwargs within the constructor of coconuts and how can I deconstruct the list to form the correct syntax to be able to be used for args, kwargs. HOpe this makes sense, Thanks in advance, Nathan

1 0

Re: localizing a sort
by aleax＠mac.com Sept. 2, 2007

Sept. 2, 2007

Ricardo Aráoz <ricaraoz(a)gmail.com> wrote: > Peter Otten wrote: ... > >>>>> print ''.join(sorted(a, cmp=lambda x,y: locale.strcoll(x,y))) > >> aeiouàáäèéëìíïòóöùúü > > > > The lambda is superfluous. Just write cmp=locale.strcoll instead. > > No it is not : > >>> print ''.join(sorted(a, cmp=locale.strcoll(x,y))) > Traceback (most recent call last): > File "<input>", line 1, in <module> > TypeError: strcoll expected 2 arguments, got 0 > > You need the lambda to assign both arguments. No, your mistake is that you're CALLING locale.strcoll, while as Peter suggested you should just PASS it as the cmp argument. I.e., ''.join(sorted('ciao', cmp=locale.strcoll)) Using key=locale.strxfrm should be faster (at least when you're sorting long-enough lists of strings), which is why strxfrm (and key=...:-) exist in the first place, but cmp=locale.strcoll, while usually slower, is entirely correct. That lambda _IS_ superfluous, as Peter said. Alex

2 1

Google spreadsheets
by Michele Simionato Sept. 2, 2007

Sept. 2, 2007

I would like to upload a tab-separated file to a Google spreadsheet from Python. Does anybody have a recipe handy? TIA, Michele Simionato

3 3

Re: code check for modifying sequence while iterating over it?
by aleax＠mac.com Sept. 2, 2007

Sept. 2, 2007

Neal Becker <ndbecker2(a)gmail.com> wrote: > After just getting bitten by this error, I wonder if any pylint, pychecker > variant can detect this error? I know pychecker can't (and I doubt pylint can, but I can't download the latest version to check as logilab's website is temporarily down for maintenance right now). It's a very thorny problem to detect a reasonable subset of likely occurrences of this bug by static analysis only, i.e., without running the code:-( Alex

1 0

Re: status of Programming by Contract (PEP 316)?
by Bryan Olson Sept. 2, 2007

Sept. 2, 2007

Steve Holden wrote: [...] > If I can blow my own trumpet briefly, two customers (each using over 25 > kLOC I have delivered over the years) ran for two years while I was away > in the UK without having to make a single support call. One of the > systems was actually locked in a cupboard all that time (though I have > since advised that client to at least apply OS patches to bring it up to > date). > This was achieved by defensive programming, understanding the user > requirements and just generally knowing what I was doing. On the one hand, nice work. Made your customers happy and kept them happy. Can't argue with success. On the other hand, 25K lines is tiny by software engineering standards. If a support call would have to go to you, then the project must be small. Software engineering is only a little about an engineer knowing or not knowing what he or she is doing; the bigger problem is that hundreds or thousand of engineers cannot possibly all know what all the others are doing. I work on large and complex systems. If I screw up -- O.K., face facts: *when* I screw up -- the chance of the issue being assigned to me is small. Other engineers will own the problems I cause, while I work on defects in code I've never touched. I wish I could own all my own bugs, but that's not how large and complex systems work. Root-cause analysis is the hard part. By the time we know what went wrong, 99.99% of the work is done. Design-by-contract (or programming-by-contract) shines in large and complex projects, though it is not a radical new idea in software engineering. We pretty much generally agree that we want strong interfaces to encapsulate implementation complexity. That's what design-by-contract is really about. There is no strong case for adding new features to Python specifically for design-by-contract. The language is flexible enough to support optionally-executed pre-condition and post-condition checks, without any extension. The good and bad features of Python for realizing reliable abstraction are set and unlikely to change. Python's consistency and flexibility are laudable, while duck-typing is a convenience that will always make it less reliable than more type-strict languages. -- --Bryan

5 5

create Powerpoint via com
by Alan Isaac Sept. 2, 2007

Sept. 2, 2007

Can someone point me to a simple example or better yet tutorial for creating a Powerpoint using Python. Thanks, Alan Isaac

2 6