[BangPypers] How to handle files efficiently in python
vsapre80 at gmail.com
Wed Mar 23 21:55:04 CET 2011
On Wed, Mar 23, 2011 at 11:57 AM, Senthil Kumaran <orsenthil at gmail.com>wrote:
> On Wed, Mar 23, 2011 at 2:24 PM, Senthil Kumaran <orsenthil at gmail.com>
> > - file IO based. Seek to end of file and do a seek in the reverse
> > direction based on a factor matching the size, and process and
> > display. ( I found a good discussing on StackOverflow after writing
> > this).
> BangPypers mailing list
> BangPypers at python.org
if you could read the entire file in one go...(i.e. unless your file is more
than 50MB)...how about the following?
# n is the number of lines you want to read.
l = open(filename).read().rsplit('\n', n+1)
# following is to keep the memory requirement low.
# but this is optional, if you only want to print the lines, and then end
the python process.
l = None
... do other stuff
if you cannot read the entire file in one go...then the stackoverflow answer
above from S.Lott is best.
Thanks and best regards,
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