Question on Manipulating List and on Python

Subhabrata Banerjee subhagurgaon2011 at gmail.com
Fri Sep 30 08:43:13 CEST 2011


On Sep 30, 12:52 am, "Prasad, Ramit" <ramit.pra... at jpmorgan.com>
wrote:
> -----Original Message-----
> From: python-list-bounces+ramit.prasad=jpmorgan.... at python.org [mailto:python-list-bounces+ramit.prasad=jpmorgan.... at python.org] On Behalf Of Chris Angelico
> Sent: Thursday, September 29, 2011 11:51 AM
> To: python-l... at python.org
> Subject: Re: Question on Manipulating List and on Python
>
> On Fri, Sep 30, 2011 at 2:36 AM, Subhabrata Banerjee
> <subhagurgaon2... at gmail.com> wrote:
> > And Python seems faster than C++/Java. It is indeed. I also experience
> > it.
>
> Python compared to Java? Difficult to compare. Python to C++?
> Impossible to compare. But performance depends MASSIVELY on
> algorithmic quality; if you code the exact same thing in Python and in
> C++, you would probably find that the C++ one is faster, but chances
> are you're implementing approximately the same thing in two quite
> different ways. Or possibly you're using a slow and inefficient
> library or third-party function.
>
> I've sometimes written code in one language and directly ported it to
> another, and then run both on the same hardware. With most such
> experiments, CPython generally doesn't perform all that well, and C or
> C++ rocks. But frequently, the C/C++ code is more verbose and more
> error-prone than the Python - because Python's biggest boast is not
> that it's fast, but that it's *fast enough*, while being easy to work
> with. (And every once in a while there's something where I want to use
> a pointer to some other variable, and that's a concept that just plain
> doesn't work in Python. You have references to objects, but you can't
> from one place change another variable, without using some kind of
> mutable object that they both reference.)
> -----------------------------------------------------------------------
>
> I think Steven D'Aprano had an excellent post on this a week or so ago (on the tutor list, not this one).
>
> See:http://mail.python.org/pipermail/tutor/2011-September/085573.html
>
> Ramit
>
> Ramit Prasad | JPMorgan Chase Investment Bank | Currencies Technology
> 712 Main Street | Houston, TX 77002
> work phone: 713 - 216 - 5423
>
> ChrisA
> --http://mail.python.org/mailman/listinfo/python-list
> This email is confidential and subject to important disclaimers and
> conditions including on offers for the purchase or sale of
> securities, accuracy and completeness of information, viruses,
> confidentiality, legal privilege, and legal entity disclaimers,
> available athttp://www.jpmorgan.com/pages/disclosures/email.  
>
>

Dear Group,
Thanks for your suggestions. I'll check if these work. Converting to
dictionary I was thinking but others I have to test. Without patting
my own back(I do not write algorithms that good), I can say Python is
indeed damn fast. A reason many of my friends are shifting fast to
Python and I was suggested by a reputed person of MIT CogLab to use
Python instead of C++ and it worked just fabulous for me. To my
collegue I would find out an answer.
Regards,
Subhabrata.



More information about the Python-list mailing list