Michael M. <[EMAIL PROTECTED]> wrote:
> Yes, this "gmpy" sounds good for calc things like that.
> But not available on my machine.
> ImportError: No module named gmpy
Sorry, I should have said - you'll need to download that from
http://gmpy.sourceforge.net/
> Anyway, thanks for posting. Th
[EMAIL PROTECTED] wrote:
>>Yes, this "gmpy" sounds good for calc things like that.
>>But not available on my machine.
>>ImportError: No module named gmpy
>
>
> What type of machine?
Windoof with Cygwin.
>
> The home page for gmpy is http://sourceforge.net/projects/gmpy/
>
> I have Windows ve
> Yes, this "gmpy" sounds good for calc things like that.
> But not available on my machine.
> ImportError: No module named gmpy
What type of machine?
The home page for gmpy is http://sourceforge.net/projects/gmpy/
I have Windows versions available at http://home.comcast.net/~casevh/
casevh
-
Mainly, it was fload-div. Changed to int-div (python //) runs faster.
Yes, this "gmpy" sounds good for calc things like that.
But not available on my machine.
ImportError: No module named gmpy
Anyway, thanks for posting. This gmpy module can be very intersting.
But right now, the focus was, if i
mm <[EMAIL PROTECTED]> wrote:
> (Yes, I konw whats an object is...)
> BTW. I did a translation of a pi callculation programm in C to Python.
> (Do it by your own... ;-)
> Calc PI for 800 digs(?). (german: Stellen)
> int a=1,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
> for(;
> Here is my attempt to convert the C code, not written with speed in mind
> and I was too lazy too time it. :-)
>
> from itertools import izip
>
> def pi():
> result = list()
> d = 0
> e = 0
> f = [2000] * 2801
> for c in xrange(2800, 0, -14):
> for b, g in izip(xrang
In <[EMAIL PROTECTED]>, Michael M. wrote:
> * The C is very fast, Python not.
> * Target: Do optimization, that Python runs nearly like C.
As someone else already asked: Why? You can't beat a compiled to machine
code language with an interpreted one when doing integer arithmetic.
> counter=c
>
Michael M. wrote:
> Ok, here is the code. It is a translation of the following code, found
> on the internet.
>
> * The C is very fast, Python not.
> * Target: Do optimization, that Python runs nearly like C.
There is an error in the translated code. It returns 1600 digits
instead of 800 digits.
On Thu, 04 Jan 2007 02:10:44 +0100, Michael M. wrote:
> print "\nTiming a 1 million loop 'for loop' ..."
> start = time.clock()
> for x in range(100):
>y = x # do something
Why not "pass # do nothing"?
> end = time.clock()
> print "Time elapsed = ", end - start, "seconds"
Are you awar
Michael M.:
> * The C is very fast, Python not.
> * Target: Do optimization, that Python runs nearly like C.
Python can't be fast as C for that kind of programs.
Note that your original C program gives less digits than the Python
program.
Your original takes about ~15.2 s on my PC. The following v
At Wednesday 3/1/2007 22:10, Michael M. wrote:
Ok, here is the code. It is a translation of the following code, found
on the internet.
* The C is very fast, Python not.
* Target: Do optimization, that Python runs nearly like C.
Why? Python is strong in other aspects, *not* on computation spee
Ok, here is the code. It is a translation of the following code, found
on the internet.
* The C is very fast, Python not.
* Target: Do optimization, that Python runs nearly like C.
Auf 800 Stellen in 160 Zeichen...
--
int a=1,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
for
> If someone is really interested in speed optimization, I can publish my
> PI-calc code.
I wouldn't mind seeing it. Chances are you will get much better help if
you post your code anyway.
-Matt
--
http://mail.python.org/mailman/listinfo/python-list
At Wednesday 3/1/2007 12:50, mm wrote:
Hmm... it's a question. It was not that easy to translate this [EMAIL PROTECTED]
C-Program into readable code and then to Python. But it works.
Because that code was written with C in mind, and uses some C
subtlecies (uhm, got it right?) obscuring the or
Yes. But it still runns very slowly.
If someone is really interested in speed optimization, I can publish my
PI-calc code.
Maybe for some Python compiler/interpreter hackers... ;-)
(There are only 2 while-loops, one within another, and some simple basic
calculations. Nothing special.)
Stefan
Hmm.. thanks. I did this changes, but without any performance profits.
Matimus wrote:
> Using the '+' operator for string concatonation can be slow, especially
> when done many times in a loop.
>
>
>> pi = pi + str("%04d" % int(e + d/a)) ## this should be fast?! I dont
>
>
> The accepted
On 2007-01-03 16:50, mm wrote:
> More general, maybe there is a speed optimazation docu out there.
At least Alex Martellis "Python in a Nutshell" has a section on
optimization.
I presented this at the last EuroPython conference:
http://sschwarzer.com/download/optimization_europython2006.pdf
Stef
Using the '+' operator for string concatonation can be slow, especially
when done many times in a loop.
>pi = pi + str("%04d" % int(e + d/a)) ## this should be fast?! I dont
The accepted solution would be to make pi an array and append to the
end...
pi = [] #create the array (empty)
...
...
Ah, no. It was a HASH (assoziative Array or somethings like that).
mm wrote:
>
> I konw, that for example while-loops in Perl are very slow. Maybe this
> is also known in Pyhton. Then, I can translate the while-loops in to
> for-loops, for example.
> More general, maybe there is a speed optim
Hmm... it's a question. It was not that easy to translate this [EMAIL
PROTECTED]
C-Program into readable code and then to Python. But it works.
There are only two while-loops (a while within an other while).
I konw, that for example while-loops in Perl are very slow. Maybe this
is also known
mm wrote:
> (Yes, I konw whats an object is...)
> BTW. I did a translation of a pi callculation programm in C to Python.
> (Do it by your own... ;-)
Is that a question on how to optimize code you won't show us? If yes, I'm
sorry to tell you that crystal balls are short these days. Too much
new-ye
(Yes, I konw whats an object is...)
BTW. I did a translation of a pi callculation programm in C to Python.
(Do it by your own... ;-)
Calc PI for 800 digs(?). (german: Stellen)
--
int a=1,b,c=2800,d,e,f[2801],g;main(){for(;b-c;)f[b++]=a/5;
for(;d=0,g=c*2;c-=14,printf("%.4d",e+
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