Adding/substracting string to a feed

[jmesar]

Hello,
As is suggested in the Calibre manual (BBC news), I am trying with the column of Andrés Oppenheimer in Miami Herald, I want o use the pintable version because the normal one is split in two screens, while pintable version NOT so.
My problem is that I don’t find a way to insert a string at n character let me show

The original feed is:
http://www.elnuevoherald.com/2012/02/18/1130892/andres-oppenheimer-nuevos-vientos.html#storylink=rss

and the pintable version is:
http://www.elnuevoherald.com/2012/02/18/v-print/1130892/andres-oppenheimer-nuevos-vientos.html

So the difference is that Printable version has “v-print/” at the 30 character of the original feed and substract "#storylink=rss"

This is my first attempt to build a recipe, I don find a instruction to insert “v-print/” at the 30 character, and substract "#storylink=rss" at the end.

I thanks any help

[rjgrigaitis]

I'm new to Python, so there may be a better way to do this. However, this is how I would do it:

parts = re.match(r"(?P<begin>http://www.elnuevoherald.com/\d+/\d+/\d+)(?P<end>/\d+/.+\.html)", feed)
feed = parts.group('begin') + "/v-print" + parts.group('end')