Re: triangulation
On 11/9/05, Shi Mu <[EMAIL PROTECTED]> wrote: > Delaunay triangulations > > On 11/9/05, Robert Kern <[EMAIL PROTECTED]> wrote: > > Shi Mu wrote: > > > is there any sample code to triangulation? many thanks! > > > > Triangulation of what? Scattered points in a plane? 2D manifolds > > embedded in a 3D space? > > > > Delaunay triangulations? Constrained triangulations? Googling "delaunay triangulation python" gives this as the first hit: http://www.python.org/pypi/Delny/0.1.0a2 -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: odd behavior
On 11 Nov 2005 11:34:47 -0800, Greg <[EMAIL PROTECTED]> wrote: > Forgive me, and be kind, as I am just a newby learning this language > out of M.L. Hetland's book. The following behavior of 2.4.1 seems very > strange > >>> x = ['aardvark', 'abalone', 'acme', 'add', > 'aerate'] > >>> x.sort(key=len) > >>> x > ['add', 'acme', 'aerate', 'abalone', 'aardvark'] > >>> x.sort(reverse=True) > >>> x > ['aerate', 'add', 'acme', 'abalone', 'aardvark'] > The function called on line 4, at least to me, should work on x as it > was on line 3, not the previously existing x on line 1. What gives? The key option defaults to an alphabetic sort *every time* you call sort, so if you want to change this, you must call for your sort key each time. To do what you want, roll the sorts into one step: >>> x.sort(key=len, reverse=True) >>> x ['aardvark', 'abalone', 'aerate', 'acme', 'add'] -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Print to Windows default Printer
On Thu, 20 Jan 2005 19:14:10 -, Tim Golden <[EMAIL PROTECTED]> wrote: > [Kristian Zoerhoff] > | > | On Thu, 20 Jan 2005 18:58:25 -, Tim Golden > | <[EMAIL PROTECTED]> wrote: > | > > | > Can anyone else try a "PRINT blah" or a "COPY blah LPT1:" > | > on XP SP2? > | > | The printer is probably connected via USB, not the parallel port > | (LPT1), so the above won't work. I googled, and found some sage advice > | here: > | > | http://www.winnetmag.com/Article/ArticleID/39674/39674.html > | > | that may assist the OP. > > Ah. I'm so old-fashioned, the idea of a USB printer had > never occurred to me (I've never used one, in fact). > > Thanks for the info. Did you post back to the list as well? > Whoops. I am now :-) -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Two questions on lambda:
On 6/24/05, Xavier Décoret <[EMAIL PROTECTED]> wrote:
>
> For example, the code
>
> # f = lambda : print "hello"
> # f()
> does not compile, although:
>
> # def f():
> # print "hello"
> # f()
>
> does compile. Is there a particular syntax for lambda that I am missing
> or is it simply limited and I cannot do what I want with lambda.
lambda calls can only include functions; print is a statement, not a
function. Try this instead:
import sys
f = lambda : sys.stdout.writelines("Hello")
f()
However, if you're going to be binding the function to a name, there
is no need to use lambda at all; just def a function and be done with
it.
> In the same spirit, how can I do to compute intermediary values in the
> body of a lambda function. Let's say (dummy example):
I leave this to someone more expert than I.
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Re: Printing to printer
On 8/11/05, Steve M <[EMAIL PROTECTED]> wrote: > Hello, > >I'm having problems sending information from a python > script to a printer. I was wondering if someone might send me > in the right direction. I wasn't able to find much by Google Which platform? Directions will vary wildly. -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: Printing to printer
On 8/11/05, Steve M <[EMAIL PROTECTED]> wrote: > Kristian Zoerhoff wrote: > > > On 8/11/05, Steve M <[EMAIL PROTECTED]> wrote: > >> Hello, > >> > >>I'm having problems sending information from a python > >> script to a printer. I was wondering if someone might send me > >> in the right direction. I wasn't able to find much by Google > > > > Which platform? Directions will vary wildly. > > > Ooops, sorry forgot to mention I'm using Suse 9.0 and Python 2.3x Assuming a local printer, you could just open the appropriate device file (e.g. /dev/lp0) in write mode and write the text to it. Another option would be to create a temp file, and then feed that to the lpr or enscript commands via the subprocess module. -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: trouble with time --again
On 30 Aug 2005 10:42:41 -0700, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
> Hey there,
> could someone show me where i am going wrong here?
>
> >>> date1 = '2005-01-01 8:20:00'
> >>> date1 = strptime('%Y-%m-%d %H:%M:%S',date1)
>
> raise ValueError("time data did not match format: data=%s fmt=%s" %
> ValueError: time data did not match format: data=%Y-%m-%d%H:%M:%S
> fmt=2005-01-01 8:20:00
Try:
>>> date1 = strptime(date1, '%Y-%m-%d %H:%M:%S')
I think you have the data and format strings swapped.
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Re: trouble with time --again
On 30 Aug 2005 10:54:29 -0700, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > > i feel like a complete idiot. Now don't go and do that. Mistakes happen. -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: curious problem with large numbers
On Apr 7, 2005 3:34 PM, David M. Cooke
>
> I don't do Windows, so I can't say this will work, but try
>
> >>> inf = 1e308*2
I *do* do Windows, and that does work. The value of inf then becomes
'1.#INF' as expected. Strangely, doing
float('1.#INF')
still fails on Windows. Weird, weird.
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Re: Compute pi to base 12 using Python?
On 13 Apr 2005 12:06:26 -0400, Roy Smith <[EMAIL PROTECTED]> wrote: > Scott David Daniels <[EMAIL PROTECTED]> wrote: > >If you think those are fun, try base (1j - 1) > > Get real. I can't imagine using anything so complex. +1 QOTW -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: how to find the drive in python/cygwin?
On 26 Apr 2005 11:29:26 -0700, Mayer <[EMAIL PROTECTED]> wrote: > Hello: > > I'm running python under cygwin and need to find the drive letter. > Cygwin has a way of calling my drives by a name relative to the Cygwin > directory, so I get things like /home/user rather than > /cygdrive/g/cygwin/home/usr, etc. How can I find the letter of the > drive, or in the above example, the letter 'g'? Generally, drive N gets mapped to /cygdrive/n/ but you could call the 'mount' command and parse the output to see what drive letter got assigned to a given path. On my system, mount returns: $ mount C:\cygwin\usr\X11R6\lib\X11\fonts on /usr/X11R6/lib/X11/fonts type system (binmode) C:\cygwin\bin on /usr/bin type system (binmode) C:\cygwin\lib on /usr/lib type system (binmode) C:\cygwin on / type system (binmode) c: on /cygdrive/c type user (binmode,noumount) d: on /cygdrive/d type user (binmode,noumount) g: on /cygdrive/g type user (binmode,noumount) x: on /cygdrive/x type user (binmode,noumount) z: on /cygdrive/z type user (binmode,noumount) > My program needs to run on an external media that comes with Cygwin on > it. I have no control over what drive is assigned to that media, but > for some reason, I do need to know the letter. Why? -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Fwd: how to find the drive in python/cygwin?
Forwarding to list, as you forgot to Reply-all (Don't worry, we all do it at least once!). -- Forwarded message -- From: Mayer Goldberg <[EMAIL PROTECTED]> Date: Apr 26, 2005 3:01 PM Subject: Re: how to find the drive in python/cygwin? To: Kristian Zoerhoff <[EMAIL PROTECTED]> Dear Kristian: Thanks for the very fast reply! I wasn't thinking of the mount command -- this is really the correct way to think about my problem. >>My program needs to run on an external media that comes with Cygwin on >>it. I have no control over what drive is assigned to that media, but >>for some reason, I do need to know the letter. > > Why? Basically this has to do with moving around: I use different computers throughout the day, and need to carry with me a sane and productive computing environment. Rebooting to linux is not an option for me, so I need a Windows solution. I found it in the form of a 40G pocket hard drive with a USB connection. I plug in the connection, go to my software subdirectory and run what I need. I have a mixture of Unix and Windows programs, and often I have to run a Windows program instead of a unix program (for example, I run miktex instead of the tetex that comes with cygwin). The Windows utilities need to be passed arguments in DOS format, i.e., something like G:\FOO\foo.dll. Cygwin is only one specific application I use, so I didn't install everything under the / (which would have solved many problems for me!). As a result, I need to know the drive letter. Thanks again, Mayer -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: trouble with lists
On 3 May 2005 10:42:43 -0700, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote: > I'm new to python. I tried doing this > > >>> x = [[]] * 3 > >>> print x > [ [] [] [] ] > >>> x[0].append( 2 ) > [ [2] [2] [2] ] > > I confused with the last line output. I actually expected something > like > > [ [2] [] [] ] I think you want >>> x[0] = [2] But I have no idea why you're using nested lists in this case ([2] is a one-item-long list, so x is actually a list of lists here). Are you sure this is really what you want? -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: trouble with lists
On 5/3/05, Anand Kumar <[EMAIL PROTECTED]> wrote: > > I am actually trying to mimic a multi dimensional array in C. > I tried doing things like Python lists are not arrays in that sense. If you really want an array, you probably want Numeric or Numarray. Head over to http://numeric.scipy.org/ to take a look. -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
Re: metaclass that inherits a class of that metaclass?
On 1 Jun 2005 09:41:53 -0700, infidel <[EMAIL PROTECTED]> wrote: > Why in the name of all that is holy and just would you need to do such > a thing? Is anyone else amused that this came from the mouth of someone named "Infidel"? -- Kristian kristian.zoerhoff(AT)gmail.com zoerhoff(AT)freeshell.org -- http://mail.python.org/mailman/listinfo/python-list
