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Re: iterating over a file with two pointers

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On Wednesday, September 18, 2013 4:51:51 PM UTC+5:30, Chris Angelico wrote:
> On Wed, Sep 18, 2013 at 9:12 PM, nikhil Pandey <nikhilpandey90@gmail.com> wrote:
> 
> > hi,
> 
> > I want to iterate over the lines of a file and when i find certain lines, i need another loop starting from the next of that "CERTAIN" line till a few (say 20) lines later.
> 
> > so, basically i need two pointers to lines (one for outer loop(for each line in file)) and one for inner loop. How can i do that in python?
> 
> > please help. I am stuck up on this.
> 
> 
> 
> After the inner loop finishes, do you want to go back to where the
> 
> outer loop left off, or should the outer loop continue from the point
> 
> where the inner loop stopped? In other words, do you want to locate
> 
> overlapping sections, or not? Both are possible, but the solutions
> 
> will look somewhat different.
> 
> 
> 
> ChrisA

Hi Chris,
After the inner loop finishes, I want to go back to the next line from where the outer loop was left i.e the lines of the inner loop will be traversed again in the outer loop.
1>>I iterate over lines of the file
2>> when i find a match in a certain line, i start another loop till some condition is met in the subsequent lines
3>> then i come back to where i left and repeat 1(ideally i want to delete that line in inner loop where that condition is met, but even if it is not deleted, its OK)

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iterating over a file with two pointers nikhil Pandey <nikhilpandey90@gmail.com> - 2013-09-18 04:12 -0700
  Re: iterating over a file with two pointers Chris Angelico <rosuav@gmail.com> - 2013-09-18 21:21 +1000
    Re: iterating over a file with two pointers nikhil Pandey <nikhilpandey90@gmail.com> - 2013-09-18 05:07 -0700
      Re: iterating over a file with two pointers Travis Griggs <travisgriggs@gmail.com> - 2013-09-18 09:18 -0700
  Re: iterating over a file with two pointers Dave Angel <davea@davea.name> - 2013-09-18 11:39 +0000
    Re: iterating over a file with two pointers Roy Smith <roy@panix.com> - 2013-09-18 08:56 -0400
      Re: iterating over a file with two pointers Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-09-18 14:09 +0100
      Re: iterating over a file with two pointers Roy Smith <roy@panix.com> - 2013-09-18 10:36 -0400
      Re: iterating over a file with two pointers Dave Angel <davea@davea.name> - 2013-09-18 20:07 +0000
      Re: iterating over a file with two pointers Peter Otten <__peter__@web.de> - 2013-09-19 09:23 +0200
      Re: iterating over a file with two pointers Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-09-19 15:16 +0100
      Re: iterating over a file with two pointers Peter Otten <__peter__@web.de> - 2013-09-19 16:38 +0200
      Re: iterating over a file with two pointers Oscar Benjamin <oscar.j.benjamin@gmail.com> - 2013-09-19 15:48 +0100
  Re: iterating over a file with two pointers Peter Otten <__peter__@web.de> - 2013-09-18 13:44 +0200
    Re: iterating over a file with two pointers nikhil Pandey <nikhilpandey90@gmail.com> - 2013-09-18 05:14 -0700
      Re: iterating over a file with two pointers Peter Otten <__peter__@web.de> - 2013-09-18 14:54 +0200
      Re: iterating over a file with two pointers Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-19 02:40 +0000
  Re: iterating over a file with two pointers Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2013-09-19 02:56 +0000
    Re: iterating over a file with two pointers Joshua Landau <joshua@landau.ws> - 2013-09-19 08:04 +0100

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