Re: [Jython-users] Java Regular Expressions in Jython

[Kent J. <ke...@td...>]

Simon Vans-Colina wrote:
> Hi all, Why doesnt this work? (should return a 1)
> 
> Im trying to match on multiple lines, the (?m) should tell the Java RE engine to use multiple line matching. 
> 
> Anyone?
> 
> Cheers
>  Simon Vans-Colina
> 
> 
>>>>import java.lang.String
>>>>line=java.lang.String("line1\nline2")
>>>>import java.util.regex as RE
>>>>RE.Pattern.compile("(?m).*").matcher(line).matches()
> 
> 0

You are using the wrong flag. MULTILINE (?m) affects how ^ and $ match. 
You need DOTALL (?s) which makes . match line endings.

 >>> import java
 >>> line=java.lang.String("line1\nline2")
 >>> java.util.regex.Pattern.compile("(?s).*").matcher(line).matches()
1

You can use Python's re module as well:
 >>> import re
 >>> line = "line1\nline2"
 >>> re.compile('(?s).*').match(line)
org.python.modules.sre.MatchObject@93fd01

or just
 >>> re.match('(?s).*', line)
org.python.modules.sre.MatchObject@3d4817

Kent