No doubt I should know this regex point but ..

J

Jim Hefferon

I am writing a class that walks through a file tree and (among other things)
filters out which files it considers. So I want to have
__init__( .. ,filterExpression='..')
For the default I want to filter nothing. So I need a Python regular expression
that never matches. What is (the best) one?

Thanks for any help,
Jim
 
A

Aahz

I am writing a class that walks through a file tree and (among other things)
filters out which files it considers. So I want to have
__init__( .. ,filterExpression='..')
For the default I want to filter nothing. So I need a Python regular
expression that never matches. What is (the best) one?

None

Seriously, make the default None, and test for it before trying a regex.
 

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