On Mon, 07 May 2007 14:41:02 -0700, Nick Vatamaniuc wrote:
> Rohit,
>
> Consider using an SQLite database. It comes with Python 2.5 and higher.
> SQLite will do a nice job keeping track of the index. You can easily
> find the line you need with a SQL query and your can write to it as
> well. When you have a file and you write to one line of the file, all of
> the rest of the lines will have to be shifted to accommodate, the
> potentially larger new line.
Using an database for tracking line number and byte position -- isn't
that a bit overkill?
I would have thought something as simple as a list of line lengths would
do:
offsets = [35, # first line is 35 bytes long
19, # second line is 19 bytes long...
45, 12, 108, 67]
To get to the nth line, you have to seek to byte position:
sum(offsets[:n])
--
Steven.
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