Re: finding an element in a string
On Mon, Jun 25, 2007 at 04:09:50PM -0400, Miguel Oliveira wrote:
> I want to make an if statement in which I would like to find a
> certain word in a sentence; here is what i have so far:
>
>x = raw_input("how are you?")
>
>if x == "fine":
> print "Good."
>
> But that, obviously, will only respond "good" when one writes
> "fine". I was looking for a way for the program to respond "good"
> to any sentence that would contain the word "fine" in it.
Since strings are sequences, too, you can use the membership
operator ('in'):
>>> input = "spam; spam, eggs and spam; spam, sausage and spam..."
>>> if "spam" in input:
>>>sing()
http://docs.python.org/ref/sequence-types.html
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Re: finding an element in a string
On 6/25/07, Miguel Oliveira <[EMAIL PROTECTED]> wrote: > I was looking for a way for the program to respond "good" to any sentence > that would contain the word "fine" in it. This will work for any string with the string "fine" in it. if "fine" in x: print "Good." -- Jerry -- http://mail.python.org/mailman/listinfo/python-list
Re: finding an element in a string
On Mon, Jun 25, 2007 at 04:09:50PM -0400, Miguel Oliveira wrote: > But that, obviously, will only respond "good" when one writes "fine". I was > looking for a way for the program to respond "good" to any sentence that would > contain the word "fine" in it. What you want is a regular-expression match. Are you familiar with regexes? The relevant Python documentation is here (for the module 're'): http://docs.python.org/lib/module-re.html though I find it's not particularly easy reading. The Friedl book recommended in there is the canonical source about regexes, and it is indeed a great book. You should read some manpages first, though. Just google for 'regular expressions' and you'll find all that you need. In the meantime, what you want is something like if re.search( r'fine', x ): # things one does if the user said 'fine' Alternately, you could just use rfind(): http://docs.python.org/lib/string-methods.html but regexes are a good tool to get to know. They're overused (particularly in Perl), but this is just the sort of task they're good for. -- Stephen R. Laniel [EMAIL PROTECTED] Cell: +(617) 308-5571 http://laniels.org/ PGP key: http://laniels.org/slaniel.key -- http://mail.python.org/mailman/listinfo/python-list
finding an element in a string
Hi,
I was wondering if you could help me with this:
I want to make an if statement in which I would like to find a certain word in a sentence; here is what i have so far:
x = raw_input("how are you?")
if x == "fine":
print "Good."
But that, obviously, will only respond "good" when one writes "fine". I was looking for a way for the program to respond "good" to any sentence that would contain the word "fine" in it.
I'm sure it's something ridiculously easy, but I have no idea how to do it! :)
Thank you,
Miguel :)MSN Busca: fácil, rápido, direto ao ponto. Encontre o que você quiser. Clique aqui.
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