[Tutor] Regular expression to match \f in groff input?

[Alan Gauld]

"Bill Campbell" <bill at celestial.net> wrote 

> to get regular expressions to match the font change sequences in
> *roff input (e.g. \fB for bold, \fP to revert to previous font).
> The re library maps r'\f' to the single form-feed character (as
> it does other common single-character sequences like r'\n').

I think all you need is an extra \ to escape the \ character in \f

> This does not work in puthon:
> 
> s = re.sub(r'\f[1NR]', '</emphasis>, sinput)

Try

s = re.sub(r'\\f[1NR]', '</emphasis>, sinput)

HTH,

-- 
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld