Line indexing in Python

seafoid fitzpadj at tcd.ie
Fri Dec 18 13:22:56 EST 2009


Hi Guys,

It has been point out that it is difficult for anyone to provide suggestions
if I do not outline more clearly my input file and an example of what I wish
to do with it (Thanks Rory!).

I mentioned it in this thread (Is creating different threads bad etiquette?
If so, lesson learned!):

http://old.nabble.com/Parsing-file-format-to-ensure-file-meets-criteria-to26837682.html

Hope you guys may have some suggestions as I am stumped!

Thanks,
Seafoid :-)

seafoid wrote:
> 
> Hi Guys,
> 
> When python reads in a file, can lines be referred to via an index?
> 
> Example:
> 
> for line in file:
>      if line[0] == '0':
>          a.write(line)
> 
> This works, however, I am unsure if line[0] refers only to the first line
> or the first character in all lines.
> 
> Is there an easy way to refer to a line with the first character being a
> single letter that you know?
> 
> Thanks in advance,
> Seafoid.
> 

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