🌐 Mailman 3 December 2001 - Python-list - python.org

Just started, need help!
by Kyle Thompson Dec. 1, 2001

Dec. 1, 2001

Hi, When I do an input command, I hit enter so I may then do the if and else command but when I hit enter it try's to run the input command. How do I make it not run when its being made and just run when I'm done with a part and want to run it? -Thanks

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PythonWin DDE Conversion error
by phony_address＠yahoo.com Dec. 1, 2001

Dec. 1, 2001

New here. This is my first programming experience. I d/l PythonWin and when I open it from the Start > Programs etc. (Windows ME), I get a delay and then an error message, "There was an error in the DDE conversion with PythonWin." Then the program pops open. What's up with this? When the program opens, is it fully functional in every way? Is there a way to fix this? Is this the wrong place to post a message about PythonWin? Please post any responses to this to this newsgroup.

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Parsing chars from serial port
by Erik Myllymaki Dec. 1, 2001

Dec. 1, 2001

I am using the win32comport_demo as the basis for a serial port handler. It works well, but the even loop grabs input from the COM port character-by-character, and I need to pass a full line to my database. I have fooled around with this all morning, but I feel like I am reinventing the whell. Can anyone point to my solution? -- Erik Myllymaki erik(a)pacific-shores.com

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PHP vs. Python/comp.lang.php?
by the Spinning Spider Dec. 1, 2001

Dec. 1, 2001

I'm finding learning Java is quite a tough challenge, like wading through a swamp. So I'm exploring PHP and Python as possible alternatives. I notice there doesn't seem to be much mention about PHP by Python people whenever they mention other languages, e.g.,see http://www.python.org/doc/Comparisons.html. Or is it because PHP is incomparable against Python? Could it be the news servers I have access to, or is there no comp.lang.php newsgroup? Is PHP too insignificant? Will Python be too intellectually challenging, like Java?

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Re: Deprecate tabs for indenting (was Re: Indenting with tabs vs spaces)
by Fernando Pérez Dec. 1, 2001

Dec. 1, 2001

Jeff Hinrichs wrote: > my 0.02$US: > Actually, spaces are the problems not tabs. A tab is a tab, where > is indenting by spaces....hmm. > let's see, I like 4 spaces, he like 8 and she likes 6 and so on. > That causes more grief than tabs. > Where as tabs, 1 tab = 1st level block, 2 tabs = 2nd level block and > so on. > > Maybe if people didn't use such brain dead editors that actually > replaced > tabs with spaces this would be a complete non-issue. You should be > able to configure your editor to display tabs in a width that is to > your liking > WITHOUT mucking with the data. As it is, we are doomed to listen to > this argument go on ad nauseum. > In theory, I agree with you. Reality, as always, is more complicated. But not because of brain-dead editors. Even if you could rid the world of those, and were left with only god-fearing, tab-respecting editors, you'd still have a problem: *not all code is typed by hand*. Pasting. There's the breaker for this issue. One of the beauties of python is the interactive prompt, right? You type some code, if it works you highlight, middle click and off you go. Well, try it and see where your tabs go. Or the web, or newsgroups, or email... There are *many* situations which don't preserve tabs as tabs, and code flows through them. So forget about it. Again, in an ideal world where not only editors but *every conceivable piece of software that can display text* respected tabs as tabs, your idea would work. Welcome to reality. f.

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Re: Whatever happened to String Interpolation?
by Fernando Pérez Dec. 1, 2001

Dec. 1, 2001

Andreas Kostyrka wrote: > What about "%%%(x)s%%" % locals() I'm looking for _clarity_ in the code. I've already written enough perl code in my life for things like that. > >> I am a big defender of not extending things unless truly needed, >> and with time I've learned to do things the 'python way', without >> saying at every corner 'but language_x has this feature!'. But >> string handling is the one that *constantly* feels kludgy in an >> otherwise stunningly clean and elegant language. > Nope it does not ;) > Adding magic handling of strings would make another wart in a clean > and elegant language. We already have magic strings: r'\....'. Since (char)'...' already means 'this string is special', pep215 just meant a new special mode in an already existing framework. We have raw, we'd have raw and interpolated. It doesn't introduce any new concept into the language, it only extends an existing one. >> I felt that pep215 had a clean argument, the extension is very >> orthogonal to the existing features, and can make a lot of code >> simply a lot cleaner. I feel those are strong arguments. > Not really. Python already has: > 1.) print >>f, data > 2.) "format" % data > > If you do not want exact formating the first one is quite > acceptable: >>>> import cStringIO >>>> x=cStringIO.StringIO() >>>> print >>x, "Hello World." >>>> x.getvalue() > 'Hello World.\n' This doesn't address the isssue o interpolating values with a clearer syntax, it's just a different way of doing the same we have today. >> Well, I can keep dreaming... > Try Ruby. It's got more perlish features. I don't want ruby (I've looked at it), I don't want perl (been there, done that, never again). I like python *a lot*, I just see an opportunity for a clean way of making it even more convenient in everyday programming than it already is. Cheers, f.

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IOError when printing in Python service after 2 days
by Jason R. Coombs Dec. 1, 2001

Dec. 1, 2001

I'm getting an exception in my code in a print statement. I'm running my program as a service using the service classes provided in ActivePython. The program doesn't crash in debug mode. In run mode, it runs fine for a couple of days, then I get this exception in one of my threads: Exception at Thu Nov 29 04:04:20 2001 Traceback (most recent call last): File "C:\bin\FileChangeNotifier.py", line 87, in run self.Handle( filepath ) File "C:\bin\watch.py", line 41, in SetLastChange print time.asctime(), 'Change detected in', filename IOError: [Errno 9] Bad file descriptor So, something strange appears to be happening to the stdout file descriptor. I'm having difficulty identifying this as anything but a bug in Python. I suspect it has to do with redirection of standard output in the service handling. It's possible that in writing services, I'm supposed to do something with the output, but I'm not. Does anyone have a suggestion on this? Thanks, Jason

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RE: Converting an integer to base 2
by Alves, Carlos Alberto - Coelce Dec. 1, 2001

Dec. 1, 2001

Yeah, it works. But not for n=0, when we get the wrong result '' intead '0'. See below: ====================================================================== Python 2.1 (#15, Apr 16 2001, 18:25:49) [MSC 32 bit (Intel)] on win32 Type "copyright", "credits" or "license" for more information. IDLE 0.8 -- press F1 for help >>> def ito2(n): if n < 1: return '' else: return itoa2(n / 2) + str(n & 1) >>> ito2(0) '' >>> ======================================================================== I can modified the code do fix it, but it is appending the '0' string at the begining of result. Maybe someone could resolvt it: See the modified code below do the same, also to n=0, but adding '0' at head of string. def ito2(n): if n==0: return '0' elif n < 1 and n!=0: return '' else: return ito2(n / 2) + str(n & 1) >>> ito2(4) '0100' > -----Original Message----- > From: William Park [mailto:opengeometry@yahoo.ca] > Sent: Friday, November 30, 2001 5:37 PM > To: python-list(a)python.org > Subject: Re: Converting an integer to base 2 > > > On Fri, Nov 30, 2001 at 10:16:16PM +0200, Erno Kuusela wrote: > > def itoa2(n): > > if n < 1: > > return '' > > else: > > return itoa2(n / 2) + str(n & 1) > > Brillant! > > -- > William Park, Open Geometry Consulting, <opengeometry(a)yahoo.ca>. > 8 CPU cluster, NAS, (Slackware) Linux, Python, LaTeX, Vim, Mutt, Tin > > -- > http://mail.python.org/mailman/listinfo/python-list >

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Re: Scientific Libraries in Python
by Kragen Sitaker Dec. 1, 2001

Dec. 1, 2001

Horatio Davis <horatio(a)qpsf.edu.au> writes: > I was assuming that they'd be distributing SciPy in their distribution. > What do you mean by "political obstacles"? I mean that while it would be legal to license a modified version of SciPy under the GPL and carry further development of SciPy out under that license, people who wanted to use SciPy in proprietary software would be unhappy about such a decision.

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password question on startup
by Andreas Penzel Dec. 1, 2001

Dec. 1, 2001

Hello NG! I want that on the programm-start the user has to give user-id and password. The password should not be seen on the screen, only e.g. stars. What to do? Thanks, Andreas

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