🌐 Mailman 3 May 2000 - Python-list - python.org

jpython
by Scott Hathaway June 2, 2000

June 2, 2000

Does anyone know of a JPython tutorial? I need something basic that tells me how to create applets and then to get them into the browser. I can make the demo app and compile it with jpythonc, but then I am lost as to how to view it in the browser. Thanks, Scott

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*blink* That's neat.
by Stephen Hansen June 2, 2000

June 2, 2000

While writing a function, I curiousely typed this into the Interpreter: >>> if Case is not 0 or 1: .... etc..and it worked.. This was rather surprising to me :) Dunno why, but I expected I would have to write --> if Case is not 0 or Case is not 1: Or: --> if Case != 1 or Case != 0 Okay, there's really no point to this post.. I was just surprised and had to tell someone, and my roommate really, really, REALLY didn't care. Not that anyoen here does either, but you can't give me an agitated look :) --S

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Scoping: Is Python and does it matter?
by Quentin Crain June 2, 2000

June 2, 2000

All: In Perl one may do something like: $success=1; foreach ... { my($success); # $success is "local" to this loop . . . } print $success; # $success holds whatever value it did before (One may imagine more exciting loops than this too simple example, but...) In Python, loops have no scope. Correct? Does this matter? What do the "experts" do in cases like this? I have searched the website and FAQ for "scoping" to read about the philosophy behind the (seeming) lack of scoping for loops. Did I miss it somewhere? What else might I be missing? Quentin

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Grail on OpenBSD
by John C. Hollemans June 2, 2000

June 2, 2000

Hello ! Just wondering if anyone has run the (apparently obsolete) web browser grail under OpenBSD 2.6 lately. I followed the advice of a fellow on the OBSD newsgroup and ran into a problem. Here is the error stream. Can anyone point me into the right direction please ?? I have _never_ used python before ! Python is available as a package on OBSD and requires the usual "pkg_add ..." command to install. > _____ > Dave, > > I followed your tip, installed tcl/tk and python from my OBSD 2.6 CD, > downloaded the grail sources, unpacked into /usr/local/lib/grail0.6/* > and i get this message: > > localhost# /usr/local/lib/grail0.6/grail.py > File "/usr/local/lib/grail0.6/grail.py", line 145 > raise > ^ > SyntaxError: invalid syntax > localhost# > > Running the following python test gives these errors: > > localhost# python GrailPrefs.py > Traceback (innermost last): > File "GrailPrefs.py", line 349, in ? > prefs = test() > File "GrailPrefs.py", line 307, in test > exercise("prefs = AllPreferences()", env, "Suck in the prefs") > File "../utils/testing.py", line 34, in exercise > exec stmt in env > File "<string>", line 1, in ? > File "GrailPrefs.py", line 133, in __init__ > self.load() > File "GrailPrefs.py", line 140, in load > self.sys = Preferences(os.path.join(utils.get_grailroot(), > File "/usr/local/lib/python1.5/posixpath.py", line 45, in join > elif path == '' or path[-1:] == '/': > AttributeError: __getslice__ > localhost# > > Would you be able to help with this ?? I have _never_ used python > before on any system. > > Regards / John > > Dave Simons wrote: > > > > We've tracked down the source of the following rumour to > > euth(a)uchicago.edu (euth) on dim., 21 mai 2000 19:30:32 GMT > > : > > > > >What do you recommend as a browser then? I have many problems > > >with Netscape, but I have yet to find a good unix > > >replacement. > > > > It's far from being the fastest and smoothest, since it's > > written in python, an interpreter language. But the good side is > > if you want to change something, well, you can change something. > > What's more it's only 336 Kbytes so it costs nothing to give it > > a try. > > > > http://grail.python.org/ > > > > -- > > > > ...What was God doing all that time - before the first day? > -- Message prepared: 20:10, 24/05/2000

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Is Python really slow?
by Alexander June 2, 2000

June 2, 2000

Hi I have implemented loop in Python for k in xrange(1,100000000): pass and the same one in C for ( i = 0 ; i < 1e8; i++ ) ; and the second one seems to be working hundreds of times faster than the first one Can I do anything with that. Thank you

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What's that sound?
by Paul Prescod June 2, 2000

June 2, 2000

ActiveState announces four new Python-related projects (PythonDirect, Komodo, Visual Python, ActivePython). PythonLabs announces four planet-sized-brains are going to be working on the Python implementation full time. PythonWare announces PythonWorks. Is that the sound of pieces falling into place or of a rumbling avalanche "warming up" before obliterating everything in its path? -- Paul Prescod - ISOGEN Consulting Engineer speaking for himself "I want to give beauty pageants the respectability they deserve." - Brooke Ross, Miss Canada International

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Re: deque vs list: performance notes
by Courageous June 2, 2000

June 2, 2000

> Wouldn't FIFO be the correct term? Err, yes. Egg on my face. :) I find myself doing that again and again. last first first last, gives a guy a headache. How about: "that data structure that works like grocery store shelves." :)- > More results (code attached): I reran your results on my hardware and in my configuration (you must have some nice hardware, by the way). Anyway: # c-deque(tottime) py-queue(tottime) list(tottime) 10 .004 .004 .004 100 .004 .004 .004 1,000 *.014* .050 .24 10,000 .12 .549 1.18 100,000 1.14 5.44 129.01 When benching your code, I was surprised for a moment that your 1000 entry test was so much faster than mine (I ran the test a half dozen times), but then discovered that my original reported result in that category was a typo. Whoops. This does make a very compelling case for the deque in deque implementations likely to hold 1,000 or so objects (rare, probably). >Your C extension is not much faster than a 5 minute Python hack. >Conclusion? Don't write C unless you have to. :) The better question is what is a good metric for "when you have to." While in some cases the code here is 4x faster or so, it would, as I noted earlier, appear in some cases that you won't be seeing that benefit as a matter of practice. Off the cuff, I'd probably say one good rule of thumb would be that if you're call to an external module involves a great number of operations which can be conducted outside of python, that might be a particularly compelling case. Ergo... mymodule.do_lots_of_stuff() ... is much more of a compelling case than... for i in xrange(0,10000) mymodule.do_a_little_bit() ... and so on ... C/

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Clifford Algebra
by Kirby Urner June 2, 2000

June 2, 2000

Any Python modules out there for doing Clifford Algebra? I've found several CA calculators on the web, but nothing in Python yet (my Quaternion class doesn't count). Kirby

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numpy for linux(ppc)?
by buster2642＠my-deja.com June 2, 2000

June 2, 2000

I'm mostly familiar with Jack Jansen's terrific MacPython installer for Macintosh, where Numpy is included. (Jack should get some kind of award!) I notice that, at least for LinuxPPC, Numpy isn't part of the "standard" RPM distributions. (why?) Where's the best place to get linux RPMs for Numpy? Thanks! Chuck Sent via Deja.com http://www.deja.com/ Before you buy.

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PyBalsa?
by Harry George June 2, 2000

June 2, 2000

I like the look-and-feel of the gtk-based balsa emailer. But it has classic C-based crashes in the current pre-release. I was wondering if anyone knows of a python-based rendition? A lot of replicated funcionality, I know, but I hate non-gc'd languages. -- Harry George hgg9140(a)seanet.com

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