Checking if string starts with list element

[Simon Brunning]

> Subject:	Re: Checking if string starts with list element
> 
> 
> > I want to know whether my sting *starts with* one of the strings in my
> > list.
> 
> The strings all seem to be words; can you get the first word in the
> target string, and see if that is in the list?
> 
> #Untested
> import re
> first_word = re.match('.*\b', us, word)
> if first_word in romans:
>     # do stuff.
>     pass
> 
Uh, interesting. Yes, I'm looking to match first words. I think that re is
the way to go.

One thing that I didn't mention is that the list is built up front, then not
changed. The matching process will happen several times. I can probably
build and compile a nasty re statement up-front, and use it every time I
need to do the match.

I've not used re's before. (Looks at
<http://www.python.org/doc/howto/regex/regex.html>.) I'll get back to you
when I have a clue!

> > If you are not the intended recipient, any disclosure, copying,
> > distribution, or any action taken or omitted to be taken in reliance
> > on it, is prohibited and may be unlawful.
> 
> Cool, are you going to sue me, now? <wink>
> 
The Python-list *is* the intended recipient, (along with c.l.py). So unless
you are a subscriber to neither, and have this message via some form of
hack, you're OK.

Otherwise, watch out! ;)

Cheers,
Simon Brunning
TriSystems Ltd.
sbrunning at trisystems.co.uk





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