Extracting patterns after matching a regex

[MRAB]

Martin wrote:
> Hi,
> 
> I need to extract a string after a matching a regular expression. For
> example I have the string...
> 
> s = "FTPHOST: e4ftl01u.ecs.nasa.gov"
> 
> and once I match "FTPHOST" I would like to extract
> "e4ftl01u.ecs.nasa.gov". I am not sure as to the best approach to the
> problem, I had been trying to match the string using something like
> this:
> 
> m = re.findall(r"FTPHOST", s)
> 
> But I couldn't then work out how to return the "e4ftl01u.ecs.nasa.gov"
> part. Perhaps I need to find the string and then split it? I had some
> help with a similar problem, but now I don't seem to be able to
> transfer that to this problem!
> 
> Thanks in advance for the help,
> 
m = re.search(r"FTPHOST: (.*)", s)
print m.group(1)