Brackets in brackets, braces in braces 
Author Message
 Brackets in brackets, braces in braces

It is possible to use regular expressions to match nested brackets, if
you FIX the amount of nesting:

Quote:
>>> pattern = re.compile("(\?[^?!]+(\?[^?!]+\!)*[^?!]+\!)")
>>> Line = "?AA?BB!CC!?DD!ee?EE!ff?FF?GG!HH!"
>>> print re.findall(pattern, Line)

[('?AA?BB!CC!', '?BB!'), ('?DD!', ''), ('?EE!', ''), ('?FF?GG!HH!',
'?GG!')]

In above I am searching strings limited by ?- and ! -characters.
Only one level of nesting is allowed.

The only problem I find is that re.findall() returns empty matches too.
Maybe in next version of SRE modified findall is introduced. ;)

-pekka-

PS. How about searching line = "??BB!CC!"   ? ;)



Tue, 07 Dec 2004 01:33:04 GMT  
 
 [ 1 post ] 

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