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Sent: Wednesday, December 29, 2004 6:00 AM
Subject: Tutor Digest, Vol 10, Issue 105
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Today's Topics:
1. Re: Re: Soem list operation questions? (Orri Ganel) 2. Re: Soem list operation questions? (Roel Schroeven) 3. Re: Re: Soem list operation questions? (Karl Pfl?sterer ) 4. Re: Soem list operation questions? (Roel Schroeven) 5. Re: Output to a printer (Alan Gauld) 6. Using the ? symbol (David Holland) 7. Re: O.T. (Liam Clarke) 8. Re: networking (Bill Burns)
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Message: 1 Date: Tue, 28 Dec 2004 13:48:29 -0500 From: Orri Ganel <[EMAIL PROTECTED]> Subject: Re: [Tutor] Re: Soem list operation questions? To: tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=US-ASCII
Karl, The ''.join() method was the first one suggested. Roel then suggested a math-based method, which I attempted to improve upon.
-- Email: singingxduck AT gmail DOT com AIM: singingxduck Programming Python for the fun of it.
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Message: 2 Date: Tue, 28 Dec 2004 20:27:29 +0100 From: Roel Schroeven <[EMAIL PROTECTED]> Subject: [Tutor] Re: Soem list operation questions? To: tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Karl Pfldsterer wrote:
Sorry but IMO the above is too much complicated for such a simple task.
That depends on your point of view, I think; I find it conceptually at least as easy only to think in terms of numbers when both input and output are numbers. Our assumptions are different too: I assume the input consists of digits and the output is an integer, you allow for bigger numbers as input and assume the output is a string.
Either convert the digits to a string and concatenate them with:
def intlist_to_string (lst): return ''.join(map(str, lst))
As Orri said, other posts already showed that approach. I just wanted to point out an alternative.
The first solution is IMO clear. It's also the fastest solution. If you time the functions you will see that if intlist_to_string needs 1 second intlist_to_string_red needs 2.3 seconds and your solution listtoint needs 3.5 seconds.
Depends.
import timeit
def time_it (funs, num=1000):
for fun in funs:
call = '%s(range(100))' % fun
imp = 'from __main__ import %s' % fun
t = timeit.Timer(call, imp)
print call
print t.timeit(number=num)
print '*'*50
I changed it somewhat, to make it work according to my (admittely possibly wrong) assumptions:
def time_it(funs, num=1000):
for fun in funs:
call = '%s(range(1,10)*10)' % fun
imp = 'from __main__ import %s' % fun
t = timeit.Timer(call, imp)
print call
print t.timeit(number=num)
print '*'*50and I used my version, without Orri's adaption to allow for non-digit inputs.
I also changed your function to make it return an int instead of a string, and ran it like:
time_it(('intlist_to_int', 'listtoint'), num=10000)intlist_to_int(range(1,10)*10) 1.02976551489 ************************************************** listtoint(range(1,10)*10) 0.929201057676 **************************************************
Not that much difference, but mine seems to be somewhat faster in that case. I guess it's because yours need (after I made it return an int, assuming that's what kilovh wanted) to convert the string back to an int. The algorithm to do that looks a lot like my function.
With Orri's adaption, listtoint slows down a lot, which explains your results. I think different approaches are possible, and which one is best depends on the circumstances.
Karl Pfldsterer wrote: > Please do *not* send copies of replies to me. > I read the list
I agree, but I got a copy of your reply in my inbox. Either gmane.org screwed up or you inadvertently cc-ed me.
-- "Codito ergo sum" Roel Schroeven
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Message: 3 Date: Tue, 28 Dec 2004 21:29:46 +0100 From: [EMAIL PROTECTED] (Karl Pfl?sterer ) Subject: Re: [Tutor] Re: Soem list operation questions? To: Orri Ganel <[EMAIL PROTECTED]> Cc: tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=us-ascii
On 28 Dez 2004, [EMAIL PROTECTED] wrote:
Karl, The ''.join() method was the first one suggested. Roel then suggested a math-based method, which I attempted to improve upon.
I know. I read it all; ''.join() was suggested together with a list comprehension (in such simple situations map() is IMO nicer to read so I used that).
'.join(...) is for that problem a perfekt solution: it's short, easy to read and understand and scales well. Why searching for a more complicated solution if such a good one exists? It may be a nice lecture but then you should put a big exclamation mark near it, so Python beginners (we are on a Tutor list) do not pick up wrong habits.
Karl -- Please do *not* send copies of replies to me. I read the list
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Message: 4 Date: Tue, 28 Dec 2004 21:52:58 +0100 From: Roel Schroeven <[EMAIL PROTECTED]> Subject: [Tutor] Re: Soem list operation questions? To: tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Karl Pfldsterer wrote:
Why searching for a more complicated solution if such a good one exists? It may be a nice lecture but then you should put a big exclamation mark near it, so Python beginners (we are on a Tutor list) do not pick up wrong habits.
I guess you have a point there.
-- "Codito ergo sum" Roel Schroeven
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Message: 5 Date: Tue, 28 Dec 2004 22:09:15 -0000 From: "Alan Gauld" <[EMAIL PROTECTED]> Subject: Re: [Tutor] Output to a printer To: "Luc Saffre" <[EMAIL PROTECTED]>, "Alan Gauld" <[EMAIL PROTECTED]> Cc: Bob Fleming <[EMAIL PROTECTED]>, tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1"
Hi Luc,
I'm interested. Does it handle more than plain text - although even that would be good!
needI wrote a module that permits something like:
d = Win32PrinterDocument(printerName,spoolFile) f = file(inputfile) for line in f.readlines(): d.PrintLine(line.rstrip()) d.endDoc()
Output will go to the specified Windows printer. Unfortunately I'll
some time to make it ready for the public. Tell me if you are
interested.
I was going to try doing something similar (if I ever get time!) using the WSH objects. What approach are you taking? It looks (from the EndDoc reference) that you are using the native GDI?
Alan G.
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Message: 6 Date: Tue, 28 Dec 2004 22:21:22 +0000 (GMT) From: David Holland <[EMAIL PROTECTED]> Subject: [Tutor] Using the ? symbol To: tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=iso-8859-1
I am trying to use a program that usea s '#' symbolon the pygame screen and I get this message :- 'sys:1: DeprecationWarning: Non-ASCII character '\xc2' in file birdgame29e.py on line 88, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details line 86 '
Now I did look that however I am not sure a) how to do this and b) what encoding to use. Can anyone help ?
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Message: 7 Date: Wed, 29 Dec 2004 16:23:43 +1300 From: Liam Clarke <[EMAIL PROTECTED]> Subject: Re: [Tutor] O.T. To: Tutor <tutor@python.org> Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=US-ASCII
I'm 23, married, 3 month old son, employed in New Zealand's social welfare department, in a totally non IT role, learning Python purely out of personal interest and a desire to stop working for New Zealand's social welfare department someday.
I too climb mountains, having previously been based in a village of 50 people deep in the Southern Alps. I can't ski.
On Tue, 28 Dec 2004 09:10:58 -0700, Bob Gailer <[EMAIL PROTECTED]> wrote:
I'm 64. Degrees in EE and MDiv. Career a mixture of engineering, computers,
minister, teacher, ....
Just started a new romantic relationship!
Programmed in more languages than I care to recall. The more
interesting/arcane include
IBM 650: machine language (my first), SOAP, CLASSMATE
GE 415: FORTRAN, Assembler
Singer 10: Assembler, Machine language
PDP 8: FOCAL
PL/I, APL, 370 Assembler and Machine language
Motorola 8080? Assembler and Machine language
CMS Pipelines
And finally Python. Sorta like discovering APL. And I have some desire to
integrate some APL features into Python. Anyone else want to join me in
that effort?
Hot topics for me: African Marimba Music (I teach it, design & build
instruments). I'm also a DJ on public radio for African Music, as well as a
talk show host.
Nonviolent Communication as taught by Marshall Rosenberg. A most
life-transforming process! I highly recommend it. www.cnvc.org.
Bob Gailer [EMAIL PROTECTED] 303 442 2625 home 720 938 2625 cell
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--
'There is only one basic human right, and that is to do as you damn well please.
And with it comes the only basic human duty, to take the consequences.
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Message: 8 Date: Tue, 28 Dec 2004 23:15:05 -0500 From: Bill Burns <[EMAIL PROTECTED]> Subject: Re: [Tutor] networking To: tutor@python.org Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset="iso-8859-1"
On Monday 27 December 2004 4:22 pm, Marco wrote:
Hi python tutors, Im interested on learning python but i would like to focus in a specific topic, networking, where can i find documention networking in python? sockets and all that stuff? i looked for some information but all of them were just vague. thanks in advance, Marco
Hi Marco,
You may want to take a look at Pyro which you can find here: http://pyro.sourceforge.net/
And you can find the mailing-list here: http://lists.sourceforge.net/lists/listinfo/pyro-core
I've downloaded & installed it but I've not had a chance to try it out yet.
HTH
Bill
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End of Tutor Digest, Vol 10, Issue 105
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