regular expression help

[goldtech]

Hi,

say:'oooo||ooo'

The regex is eating up too much. What I want is every non-overlapping
occurrence I think.

so rtt would be:

'oooo||flfllff||ooo'

just like findall acts but in this case I want sub to act like that.

Thanks

 

[Tim Harig]

Hi,

say:
'oooo||ooo'

The regex is eating up too much. What I want is every non-overlapping
occurrence I think.

so rtt would be:

'oooo||flfllff||ooo'

Python 3.1.2 (r312:79147, Oct 9 2010, 00:16:06)
[GCC 4.4.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import re
m="oooocccvlvlvlvnnnflfllffccclfnnnooo"
pattern = re.compile(r'ccc[^n]*nnn')
pattern.sub("||", m) 'oooo||flfllff||ooo'

 

[Tim Harig]

Python 3.1.2 (r312:79147, Oct 9 2010, 00:16:06)
[GCC 4.4.4] on linux2
Type "help", "copyright", "credits" or "license" for more information.

import re
m="oooocccvlvlvlvnnnflfllffccclfnnnooo"
pattern = re.compile(r'ccc[^n]*nnn')
pattern.sub("||", m) 'oooo||flfllff||ooo'
# or, assuming that the middle sequence might contain singular or
# double 'n's
pattern = re.compile(r'ccc.*?nnn')
pattern.sub("||", m) 'oooo||flfllff||ooo'

 

[goldtech]

.*? fixed it. Every occurrence of the pattern is now affected, which
is what I want.

Thank you very much.