Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Thanks, 6 3845
On Nov 26, 10:40 am, lisong <lisong.1...@gm ail.comwrote:
Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Thanks,
Why are you using regular expressions? Use the split method defined
for strings:
>>'abc.defg.hij .klmnop'.split( '.')
['abc', 'defg', 'hij', 'klmnop']
-- Paul
lisong wrote:
Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Nope. Regular expressions can't get back in their input-stream, at least not
for such stuff.
The problem at hand is easily solved using
s = 'abc.defg.hij.k lmnop'
pairs = [".".join(v) for v in zip(s.split("." )[:-1], s.split(".")[1:])]
Diez
On Nov 26, 10:51 am, Paul McGuire <pt...@austin.r r.comwrote:
On Nov 26, 10:40 am, lisong <lisong.1...@gm ail.comwrote:
Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Thanks,
Why are you using regular expressions? Use the split method defined
for strings:
>'abc.defg.hij. klmnop'.split(' .')
['abc', 'defg', 'hij', 'klmnop']
-- Paul- Hide quoted text -
- Show quoted text -
Sorry, misread your post - Diez Roggisch has the right answer.
-- Paul
lisong wrote:
Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Thanks,
Do you need it to be a regular expression ?
>>def f(s) :
ws = s.split('.')
return map('.'.join,zi p(ws,ws[1:]))
>>f('abc.defg.h ij.klmnop')
['abc.defg', 'defg.hij', 'hij.klmnop']
On Mon, Nov 26, 2007 at 06:04:54PM +0100, Diez B. Roggisch wrote regarding Re: How to write Regular Expression for recursive matching?:
>
lisong wrote:
Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Nope. Regular expressions can't get back in their input-stream, at least not
for such stuff.
The problem at hand is easily solved using
s = 'abc.defg.hij.k lmnop'
pairs = [".".join(v) for v in zip(s.split("." )[:-1], s.split(".")[1:])]
which is veritably perlesque in its elegance and simplicity!
A slightly more verbose version.
l = s.split('.')
pairs = []
for x in xrange(len(l)-1):
pairs.append('. '.join(l[x:x+2]))
Cheers,
Cliff
On Nov 26, 12:34 pm, "J. Clifford Dyer" <j...@sdf.lones tar.orgwrote:
On Mon, Nov 26, 2007 at 06:04:54PM +0100, Diez B. Roggisch wrote regarding Re: How to write Regular Expression for recursive matching?:
lisong wrote:
Hi All,
I have problem to split a string like this:
'abc.defg.hij.k lmnop'
and I want to get all substrings with only one '.' in mid. so the
output I expect is :
'abc.defg', 'defg.hij', 'hij.klmnop'
a simple regular expression '\w+.\w' will only return:
'abc.defg', 'hij.klmnop'
is there a way to get 'defg.hij' using regular expression?
Nope. Regular expressions can't get back in their input-stream, at least not
for such stuff.
The problem at hand is easily solved using
s = 'abc.defg.hij.k lmnop'
pairs = [".".join(v) for v in zip(s.split("." )[:-1], s.split(".")[1:])]
which is veritably perlesque in its elegance and simplicity!
A slightly more verbose version.
l = s.split('.')
pairs = []
for x in xrange(len(l)-1):
pairs.append('. '.join(l[x:x+2]))
Cheers,
Cliff
Thank u all for your kindly reply, I agree, RE is not necessary here.
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