Exact match with regular expression

[Mr.SpOOn]

Hi,
I'd like to use regular expressions to parse a string and accept only
valid strings. What I mean is the possibility to check if the whole
string matches the regex.

So if I have:

>>p = re.compile('a*b *')

I can match this: 'aaaaaabbb'

>>m = p.match('aaaaaa bbb')
>>m.group()

'aaaaaabbb'

But I'd like to get None with this: 'aabDDDDb'
Instead it matches the first part:

>>m = p.match('aabDDD Db')
>>m.group()

'aab'

I know this is the expected behaviour, but I'm sure it should be
possible doing what I said.
Are there other methods I don't know about in the re module?

Thanks.

[Rob Williscroft]

Re: Exact match with regular expression

Mr.SpOOn wrote in news:mailman.30 69.1225039892.3 487.python-
list@python.org in comp.lang.pytho n:

Hi,
I'd like to use regular expressions to parse a string and accept only
valid strings. What I mean is the possibility to check if the whole
string matches the regex.
>
So if I have:
>

>>>p = re.compile('a*b *')

>
I can match this: 'aaaaaabbb'
>

>>>m = p.match('aaaaaa bbb')
>>>m.group()

'aaaaaabbb'
>
But I'd like to get None with this: 'aabDDDDb'
Instead it matches the first part:
>

>>>m = p.match('aabDDD Db')
>>>m.group()

'aab'

Read (and bookmark) this:

http://www.python.org/doc/2.5.2/lib/re-syntax.html

You want the 3rd item down about the "$" special character.

>>p = re.compile('a*b *$')
>>m = p.match('aabDDD Db')
>>m is None

True

>>m = p.match('aaaaaa bbb')
>>m.group()

'aaaaaabbb'

Rob.
--

http://www.victim-prime.dsl.pipex.com/

[Lawrence D'Oliveiro]

Re: Exact match with regular expression

In message <Xns9B43B11B290 6ArtwfreenetREM OVEcouk@216.196 .109.145>, Rob
Williscroft wrote:

Read (and bookmark) this:
>
http://www.python.org/doc/2.5.2/lib/re-syntax.html

Funny how you never get a thank-you when you tell people to RTFM.

[Shawn Milochik]

Re: Exact match with regular expression

On Fri, Oct 31, 2008 at 8:57 PM, Lawrence D'Oliveiro
<ldo@geek-central.gen.new _zealandwrote:

In message <Xns9B43B11B290 6ArtwfreenetREM OVEcouk@216.196 .109.145>, Rob
Williscroft wrote:
>

>Read (and bookmark) this:
>>
>http://www.python.org/doc/2.5.2/lib/re-syntax.html

>
Funny how you never get a thank-you when you tell people to RTFM.
--

http://mail.python.org/mailman/listinfo/python-list

>

Hmmm. Kind of odd. Someone involved in the language they're having
trouble with wrote some documentation for the exact thing they're
asking for, you tell them where it is, and that doesn't deserve
thanks?

Something's wrong here. Well, it's about time for that which must be
read by everyone on the Internet to be mentioned again.

If you haven't read this yet, read this:

http://www.catb.org/~esr/faqs/smart-questions.html

Especially if you have asked for help and not gotten what you wanted.
Especially if people ignore your questions.
Especially if people give answers that don't help you.

[Rob Williscroft]

Re: Exact match with regular expression

Lawrence D'Oliveiro wrote in news:geg9i4$51b $2@lust.ihug.co .nz in
comp.lang.pytho n:

In message <Xns9B43B11B290 6ArtwfreenetREM OVEcouk@216.196 .109.145>, Rob
Williscroft wrote:
>

>Read (and bookmark) this:
>>
>http://www.python.org/doc/2.5.2/lib/re-syntax.html

>
Funny how you never get a thank-you when you tell people to RTFM.

Saying "Thank You" is what email is for, which in this case is
what Mr.SpOOn did:

Read (and bookmark) this:

http://www.python.org/doc/2.5.2/lib/re-syntax.html

You want the 3rd item down about the "$" special character.

>
Great, thanks.
When I read about the symbol in the tutorial I didn't realize
what was it for.

Rob.
--

http://www.victim-prime.dsl.pipex.com/

[Mr.SpOOn]

Re: Exact match with regular expression

On Sat, Nov 1, 2008 at 1:57 AM, Lawrence D'Oliveiro
<ldo@geek-central.gen.new _zealandwrote:

In message <Xns9B43B11B290 6ArtwfreenetREM OVEcouk@216.196 .109.145>, Rob
Williscroft wrote:
>

>Read (and bookmark) this:
>>
>http://www.python.org/doc/2.5.2/lib/re-syntax.html

>
Funny how you never get a thank-you when you tell people to RTFM.

My fault :\
I said "thank you" to Rob, but I just sent a private message. It's
just that I did a reply and not reply to all.

Anyway, I RTFM and solved my problem :)

Thanks again,
Bye

[Lawrence D'Oliveiro]

Re: Exact match with regular expression

In message <mailman.3423.1 225717725.3487. python-list@python.org >, Mr.SpOOn
wrote:

On Sat, Nov 1, 2008 at 1:57 AM, Lawrence D'Oliveiro
<ldo@geek-central.gen.new _zealandwrote:
>

>Funny how you never get a thank-you when you tell people to RTFM.

>
My fault :\
I said "thank you" to Rob, but I just sent a private message. It's
just that I did a reply and not reply to all.

That's OK. My fault for not realizing. :)