Re: regex (?!..) problem

Stefan Behnel wrote: Wolfgang Rohdewald wrote: I want to match a string only if a word (C1 in this example) appears at most once in it. def match(s): if s.count("C1") > 1: return None return s If this doesn't fit your requirements, you may want to provide some

Re: regex (?!..) problem

On Monday 05 October 2009, MRAB wrote: > "(?!.*?(C1).*?\1)" will succeed only if ".*?(C1).*?\1" has failed, > in which case the group (group 1) will be undefined (no capture). I see. I should have moved the (C1) out of this expression anyway: >>> re.match(r'L(?P..)(?!.*?(?P=tile).*?(?P=tile))(

Re: regex (?!..) problem

Wolfgang Rohdewald wrote: On Monday 05 October 2009, MRAB wrote: You're currently looking for one that's not followed by another; the solution is to check first whether there are two: >>> re.match(r'(?!.*?C1.*?C1)(.*?C1)','C1b1b1b1 b3b3b3b3 C1C2C3').groups() Traceback (most recent call last

Re: regex (?!..) problem

On Monday 05 October 2009, MRAB wrote: > You're currently looking for one that's not followed by another; > the solution is to check first whether there are two: > > >>> re.match(r'(?!.*?C1.*?C1)(.*?C1)','C1b1b1b1 b3b3b3b3 > C1C2C3').groups() > > Traceback (most recent call last): >File ""

Re: regex (?!..) problem

On Monday 05 October 2009, Carl Banks wrote: > Why do you have to use a regexp at all? not one but many with arbitrary content. please read my answer to Stefan. Take a look at the regexes I am using: http://websvn.kde.org/trunk/playground/games/kmj/src/predefined.py?view=markup moreover they are

Re: regex (?!..) problem

Wolfgang Rohdewald wrote: Hi, I want to match a string only if a word (C1 in this example) appears at most once in it. This is what I tried: re.match(r'(.*?C1)((?!.*C1))','C1b1b1b1 b3b3b3b3 C1C2C3').groups() ('C1b1b1b1 b3b3b3b3 C1', '') re.match(r'(.*?C1)','C1b1b1b1 b3b3b3b3 C1C2C3').groups(

Re: regex (?!..) problem

On Monday 05 October 2009, Stefan Behnel wrote: > Wolfgang Rohdewald wrote: > > I want to match a string only if a word (C1 in this example) > > appears at most once in it. > > def match(s): > if s.count("C1") > 1: > return None > return s > > If this doesn't fit y

Re: regex (?!..) problem

On Oct 4, 11:17 pm, Wolfgang Rohdewald wrote: > On Monday 05 October 2009, Carl Banks wrote: > > > What you're not realizing is that if a regexp search comes to a > >  dead end, it won't simply return "no match".  Instead it'll throw > >  away part of the match, and backtrack to a previously-match

Re: regex (?!..) problem

Wolfgang Rohdewald wrote: > I want to match a string only if a word (C1 in this example) appears > at most once in it. def match(s): if s.count("C1") > 1: return None return s If this doesn't fit your requirements, you may want to provide some more details. Stefan

Re: regex (?!..) problem

On Monday 05 October 2009, Carl Banks wrote: > What you're not realizing is that if a regexp search comes to a > dead end, it won't simply return "no match". Instead it'll throw > away part of the match, and backtrack to a previously-matched > variable-length subexpression, such as ".*?", and t

Re: regex (?!..) problem

On Oct 4, 9:34 pm, Wolfgang Rohdewald wrote: > Hi, > > I want to match a string only if a word (C1 in this example) appears > at most once in it. This is what I tried: > > >>> re.match(r'(.*?C1)((?!.*C1))','C1b1b1b1 b3b3b3b3 C1C2C3').groups() > > ('C1b1b1b1 b3b3b3b3 C1', '')>>> re.match(r'(.*?C1)'

Re: regex (?!..) problem

Why not check it simply by "count()"? >>> s = '1234C156789' >>> s.count('C1') 1 >>> -- http://mail.python.org/mailman/listinfo/python-list

Re: regex problem ..

Analog Kid wrote: > Hi guys: > Thanks for your responses. Points taken. Basically, I am looking for a > combination of the following ... > [^\w] and %(?!20) ... How do I do this in a single RE? > > Thanks for all you help. > Regards, > AK > > On Mon, Dec 15, 2008 at 10:54 PM, Steve Holden

Re: regex problem ..

Hi guys: Thanks for your responses. Points taken. Basically, I am looking for a combination of the following ... [^\w] and %(?!20) ... How do I do this in a single RE? Thanks for all you help. Regards, AK On Mon, Dec 15, 2008 at 10:54 PM, Steve Holden wrote: > Analog Kid wrote: > > Hi All: > >

Re: regex problem ..

Analog Kid wrote: > Hi All: > I am new to regular expressions in general, and not just re in python. > So, apologies if you find my question stupid :) I need some help with > forming a regex. Here is my scenario ... > I have strings coming in from a list, each of which I want to check > against a r

Re: regex problem ..

Analog Kid wrote: Hi All: I am new to regular expressions in general, and not just re in python. So, apologies if you find my question stupid :) I need some help with forming a regex. Here is my scenario ... I have strings coming in from a list, each of which I want to check against a regular

Re: regex problem with re and fnmatch

Hi John, John Machin schrieb am 11/20/2007 09:40 PM: > On Nov 21, 8:05 am, Fabian Braennstroem <[EMAIL PROTECTED]> wrote: >> Hi, >> >> I would like to use re to search for lines in a files with >> the word "README_x.org", where x is any number. >> E.g. the structure would look like this: >> [[file

Re: regex problem with re and fnmatch

On Nov 21, 8:05 am, Fabian Braennstroem <[EMAIL PROTECTED]> wrote: > Hi, > > I would like to use re to search for lines in a files with > the word "README_x.org", where x is any number. > E.g. the structure would look like this: > [[file:~/pfm_v99/README_1.org]] > > I tried to use these kind of mat

Re: regex problem

> > line is am trying to match is > > 1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra29.90.00011 1 > > > > regex i have written is > > re.compile > > (r'(\d+?)\|((P|O|Q)\w{5})\|\w{3,6}\_\w{3,5}\s+?.{25}\s{3}(\d+?\.\d)\s+?(\d\.\d+?)') > > > > I am trying to extract 0.0011 value from

Re: regex problem

HI Tim, oof! thats true! thanks a lot. Is there any tool to simplify building the regex ? regards, KM On 11/23/06, Tim Chase <[EMAIL PROTECTED]> wrote: > line is am trying to match is > 1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra29.90.00011 1 > > regex i have written is >

Re: regex problem

> line is am trying to match is > 1959400|Q2BYK3|Q2BYK3_9GAMM Hypothetical outer membra29.90.00011 1 > > regex i have written is > re.compile > (r'(\d+?)\|((P|O|Q)\w{5})\|\w{3,6}\_\w{3,5}\s+?.{25}\s{3}(\d+?\.\d)\s+?(\d\.\d+?)') > > I am trying to extract 0.0011 value from the above line

Re: regex problem

On 2005-07-26, Duncan Booth <[EMAIL PROTECTED]> wrote: rx1=re.compile(r"""\b\d{4}(?:-\d{4})?,""") rx1.findall("1234,-,4567,") > ['1234,', '-,', '4567,'] Thanks all for good advice. However this last expression also matches the first four digits when the input is more than

Re: regex problem

Duncan Booth wrote: > John Machin wrote: > > >>So here's the mean lean no-flab version -- you don't even need the >>parentheses (sorry, Thomas). >> >> >rx1=re.compile(r"""\b\d\d\d\d,|\b\d\d\d\d-\d\d\d\d,""") >rx1.findall("1234,-,4567,") >> >>['1234,', '-,', '4567,'] > >

Re: regex problem

John Machin wrote: > So here's the mean lean no-flab version -- you don't even need the > parentheses (sorry, Thomas). > > >>> rx1=re.compile(r"""\b\d\d\d\d,|\b\d\d\d\d-\d\d\d\d,""") > >>> rx1.findall("1234,-,4567,") > ['1234,', '-,', '4567,'] No flab? What about all that repeti

Re: regex problem

Odd-R. wrote: > Input is a string of four digit sequences, possibly > separated by a -, for instance like this > > "1234,-,4567," > > My regular expression is like this: > > rx1=re.compile(r"""\A(\b\d\d\d\d,|\b\d\d\d\d-\d\d\d\d,)*\Z""") > > When running rx1.findall("1234,-,4567,

Re: regex problem

Am Tue, 26 Jul 2005 09:57:23 + schrieb Odd-R.: > Input is a string of four digit sequences, possibly > separated by a -, for instance like this > > "1234,-,4567," > > My regular expression is like this: > > rx1=re.compile(r"""\A(\b\d\d\d\d,|\b\d\d\d\d-\d\d\d\d,)*\Z""") Hi, try it