[BangPypers] How to handle files efficiently in python
Hi All, How can I print last five lines of a file using python. The file may contain thousands of lines each line may differ in length. * Regrads, Brijith P * * * ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] How to handle files efficiently in python
Hi, I too answered this way to this question. I thought there may be some other efficient way to handle this situation. * Regrads, Brijith P * On 22 March 2011 22:19, Noufal Ibrahim wrote: > On Tue, Mar 22 2011, briji...@gmail.com wrote: > > > Hi All, > > How can I print last five lines of a file using python. The file > may > > contain thousands of lines each line may differ in length. > > [...] > > You'd have to use some kind of heuristic (a.k.a. dirty hack). Stat the > file to find it's size and use an "average" length of line to go a few > lines back. Then count the number of newlines from there to the end. If > it's 4, then you have your 5 lines. Otherwise, seek back a little more > and repeat. > > -- > ___ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] How to handle files efficiently in python
* Regrads, Brijith P **NuCore Software Solutions Pvt Ltd* *Mobile: +91 8089703840* Url: *www.nucoreindia.com* <http://www.nucoreindia.com> Email: *brij...@nucoreindia.com* On 23 March 2011 10:31, Gora Mohanty wrote: > On Wed, Mar 23, 2011 at 10:15 AM, briji...@gmail.com > wrote: > > Hi, > > > > I too answered this way to this question. I thought there may be some > other > > efficient way to handle this situation. > [...] > > Is this a question for students? Otherwise, what is the rationale > of doing this in Python? > This a question asked by netApp > > Regards, > Gora > ___ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] python SVN delete functionality
@Shashidhar * * You mean the *svn delete* must work when you *svn update?. *Yes we can do it. but its a tricky way. What I suggest is to create a shell/python script named *svn *and put in higher path hierarchy (for example /usr/local/bin). In side the script you code like if its ran with argument other than *up* or *update* the run /usr/bin/svn . if the argument is *update* or *up* you have to do your tasks like checking for the removed files in the working copy and /usr/bin/svn delete the files you got , and then you can run /usr/bin/svn update inside the script. :) That means write a script to override the existing svn command.. this may work.. try it.. Note:- Every svn command you use in side the script must contain absolute path other wise it will end up in a looping call * Regards, Brijith P * * * On Thu, Jun 23, 2011 at 12:34 AM, Noufal Ibrahim wrote: > Sriram Narayanan writes: > > > There's also the python API to SVN which let's you d a lot of stuff. > > [...] > > The last time I checked (and it was a long time ago), it needed physical > access to the repository file system (not just the checkout) to be able > to do anything. That makes it useless for the OPs needs. > > -- > ~noufal > http://nibrahim.net.in > > Thank God I'm an atheist. > ___ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] Creating a blog in Django 1.3 Screencasts
Nice screen Casts Thank U * Regards, Brijith P * * * On Wed, Mar 7, 2012 at 8:19 PM, Arun Ravindran wrote: > Hi all, > > Every since Django moved to 1.0, there have been very few screencasts about > Django. It is quite hard for a beginner or even someone who has used Django > to find a video tutorial adapted to the latest Django release. As a humble > attempt to solve this gap, I have created two screencasts about building a > blog in Django: > > > http://arunrocks.com/blog/2012/03/05/building_a_blog_in_30_mins_with_django_%28screencast%29/ > > > http://arunrocks.com/blog/2012/03/07/bonus_html5_makeover_for_the_django_blog/ > > Hope you find this useful. > > Thanks, > Arun > ___ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers > ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
Re: [BangPypers] executing shell commands through python script
try this. http://docs.python.org/library/commands.html Regards, Brijith P On Tue, Aug 14, 2012 at 3:15 AM, Vikram K wrote: > i am able to run the following command from the shell (i am working on Mac > Snow Leopard): > > cgatools evidence2sam --beta --evidence-dnbs > evidenceDnbs-chr11-GS10026-ASM-T1.tsv.bz2 --reference build36.crr > --output CGI_10026_CLL046_chr11_NUMA1_N.sam --extract-genomic-region > chr11,71391559,71469221 --add-mate-sequence > > The command i give above executes perfectly and i get the desired results. > Problem is that i need to execute variations of this command around two > hundred times on the shell. Can i embed this command in a python script (i > think one of the functions in the os module might be able to do what i > want). Thanks. > ___ > BangPypers mailing list > BangPypers@python.org > http://mail.python.org/mailman/listinfo/bangpypers ___ BangPypers mailing list BangPypers@python.org http://mail.python.org/mailman/listinfo/bangpypers
