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.
-Nick Vatamaniuc On May 7, 3:51 pm, rohit <[EMAIL PROTECTED]> wrote: > hi, > i am developing a desktop search.For the index of the files i have > developed an algorithm with which > i should be able to read and write to a line if i know its line > number. > i can read a specified line by using the module linecache > but i am struck as to how to implement writing to the n(th) line in a > file EFFICIENTLY > which means i don't want to traverse the file sequentially to reach > the n(th) line > > Please help. > Regards > Rohit -- http://mail.python.org/mailman/listinfo/python-list
