I have continued my research in literature algorithms in Python. The
algorithms in Knuth's volumes 1 -- 3 either have been incorporated
into Python, or they can be easily implemented with Python. Quite as
John Nagle said here. However, the Fascicles in Vol. 4 to my opinion
contain nontriv
I wrote here about some straightforward ways to program D. E. Knuth in
Python, and John Nagle answered that the value of Knuth's book series
to the programmer has been significantly diminished by the fact that
many functionalities such as sorting and hashing have either been
built in the Python la
On Thu, Jan 26, 2012 at 2:22 AM, Martin Schöön wrote:
> On 2012-01-25, Chetan Harjani wrote:
>> Thanks Alec for the link. U know I wanted to read this book by Simon
>> Singh -> The Code Book, I hear its good.
>>
> It indeed is. I only remember one error, an error every Scandinavian
> would have s
On 2012-01-25, Chetan Harjani wrote:
> Thanks Alec for the link. U know I wanted to read this book by Simon
> Singh -> The Code Book, I hear its good.
>
It indeed is. I only remember one error, an error every Scandinavian
would have spotted.
His book on Fermat's theorem is even better.
/Martin
-
Thanks Alec for the link. U know I wanted to read this book by Simon
Singh -> The Code Book, I hear its good.
Thanks Nizamov for the link, I am really looking forward to join the
class, and since its free, it is totally an asset.
Yes Thijs I have seen this book, and since its such a big book, I a
There is this book (it´s free ebook)
http://www.brpreiss.com/books/opus7/html/book.html , you can also check
this list: http://programming-motherfucker.com/become.html#Python or if you
want something more official then there is official wiki page:
http://wiki.python.org/moin/PythonBooks ...
2012/1
I assume you have seen this book?
http://www.apress.com/9781430232377
Thijs
On Wed, Jan 25, 2012, at 15:36, Chetan Harjani wrote:
> Is there any book or site on python algorithms which asks more and
> teaches less, I don't want to get bored, and at the same time I want
> to learn and act more. I
2012/1/25 Chetan Harjani :
> Is there any book or site on python algorithms which asks more and
> teaches less, I don't want to get bored, and at the same time I want
> to learn and act more. I use ubuntu. (just in case if its needed).
> #ALGORITHMS
There is a Stanford online class on Algorithms,
The thing about algorithms is they are applicable to many programming
languages (in general).
Read http://en.wikipedia.org/wiki/Turing_machine
On Wed, Jan 25, 2012 at 9:06 PM, Chetan Harjani
wrote:
> Is there any book or site on python algorithms which asks more and
> teaches less, I don't want
Is there any book or site on python algorithms which asks more and
teaches less, I don't want to get bored, and at the same time I want
to learn and act more. I use ubuntu. (just in case if its needed).
#ALGORITHMS
--
Chetan H Harjani
IIT Delhi
--
http://mail.python.org/mailman/listinfo/python-
I'm not an expert on this, but wouldn't it be more dependent on the platform
than python version? Perhaps it is Windows 7 that is very slow. Perhaps my
processor architecture. Not sure...
Here are some for 3.1.2x64
>>> import timeit
>>> timeit.timeit('Lock()', 'from threading import Lock')
1.4162
On Mon, 28 Jun 2010 16:46:41 -0700
Zac Burns wrote:
> In my experience it is far more expensive to allocate a lock in python then
> it is the types that use them. Here are some examples:
>
> >>> timeit.timeit('Lock()', 'from threading import Lock')
> 1.4449114807669048
>
> >>> timeit.timeit('dic
On 29 Jun, 05:11, Ryan Kelly wrote:
> Very interesting idea. Will it work if accessed through ctypes?
>
> ticker = ctypes.c_int.in_dll(ctypes.pythonapi,"_Py_Ticker")
> ticker.value = 0x7fff
>
> Or does ctypes muck with the GIL in a way that would break this idea?
>
>>> ctypes.pythonap
On Mon, 2010-06-28 at 19:45 -0700, sturlamolden wrote:
> > > Many lockless algorithms that I have looked at thusfar require a
> > > "Compare and Swap" operation. Does python have an equivalent to this?
> > > Is python high level enough that it has something better than this or
> > > it simply doesn
> > Many lockless algorithms that I have looked at thusfar require a
> > "Compare and Swap" operation. Does python have an equivalent to this?
> > Is python high level enough that it has something better than this or
> > it simply doesn't need it?
Python does have a GIL, and contrary to the title
> > Many lockless algorithms that I have looked at thusfar require a
> > "Compare and Swap" operation. Does python have an equivalent to this?
> > Is python high level enough that it has something better than this or
> > it simply doesn't need it?
Python does have a GIL, and contrary to the title
On Mon, 2010-06-28 at 18:27 -0700, Zac Burns wrote:
>
>
>
> I've managed to avoid locking in some cases by using
> dict.setdefault() as a kind of atomic test-and-set operation.
> It's not a full compare-and-swap but you could implement a
> simple locking sch
>
> Sure, but I think you're timing the wrong thing here. You would only
> allocate the lock relatively rarely - it's the overhead of *acquiring*
> the lock that's the real problem.
>
> r...@durian:~$ python -m timeit -s "from threading import Lock; l =
> Lock()" "l.acquire(); l.release()"
> 1
On Mon, 2010-06-28 at 16:46 -0700, Zac Burns wrote:
> In my experience it is far more expensive to allocate a lock in python
> then it is the types that use them. Here are some examples:
>
> >>> timeit.timeit('Lock()', 'from threading import Lock')
> 1.4449114807669048
>
> >>> timeit.timeit('dict
In my experience it is far more expensive to allocate a lock in python then
it is the types that use them. Here are some examples:
>>> timeit.timeit('Lock()', 'from threading import Lock')
1.4449114807669048
>>> timeit.timeit('dict()')
0.2821554294221187
>>> timeit.timeit('list()')
0.17358153222
Terry Reedy wrote:
Esmail wrote:
Hello,
Anyone using Python for coding up genetic algorithms? If
so, would you share your favorite modules/libraries/tools?
Search 'Python genetic algorithm' on Google or elsewhere.
Hi Terry,
I did that first, and I came up with a number of hits. The "proble
R. David Murray wrote:
Esmail wrote:
Hello Mohammed,
Yes, that would great. While I am comfortable with GAs,
I'm still rather inexperienced with Python so seeing some
implementation examples would be very useful.
A google for 'python genetic algorithms' turns up a number
of interesting hits.
Esmail wrote:
Hello,
Anyone using Python for coding up genetic algorithms? If
so, would you share your favorite modules/libraries/tools?
Search 'Python genetic algorithm' on Google or elsewhere.
--
http://mail.python.org/mailman/listinfo/python-list
Esmail wrote:
> Hello Mohammed,
>
> Yes, that would great. While I am comfortable with GAs,
> I'm still rather inexperienced with Python so seeing some
> implementation examples would be very useful.
A google for 'python genetic algorithms' turns up a number
of interesting hits.
I also remember
Hello Mohammed,
Yes, that would great. While I am comfortable with GAs,
I'm still rather inexperienced with Python so seeing some
implementation examples would be very useful.
Thanks,
Esmail
--
Date: Wed, 8 Apr 2009 17:08:48 +0200
Subject: Re: genetic algorithms in Python?
From: me
I have done something in this direction. I will be happy to share my
experience. However, my code is not generic and needs many things to be
manually introduced. My GA is standard (selection by roulette wheel or
tournament, single point cross). Let me know if you are interested!
On Wed, Apr 8, 200
Hello,
Anyone using Python for coding up genetic algorithms? If
so, would you share your favorite modules/libraries/tools?
Thanks,
Esmail
--
http://mail.python.org/mailman/listinfo/python-list
Not exactly but I am aware of Python code for nonlinear optimization
algorithms. Check the nlpy project at http://nlpy.sf.net It is
specifically targeted at finite-dimensional problems. However the
current trend in optimal control algorithms is to use grid-refinement
and iteratively solve finite-di
Is anyone aware of Python code for Optimal Control Algorithms based on
Pontryagin's Maximum Principle? Thanks in advance for any leads on this.
--
http://mail.python.org/mailman/listinfo/python-list
29 matches
Mail list logo
