Doing both regex match and assignment within a If loop?
victorhooi at gmail.com
Fri Mar 29 05:00:44 CET 2013
I have logline that I need to test against multiple regexes. E.g.:
expression1 = re.compile(r'....')
expression2 = re.compile(r'....')
with open('log.txt') as f:
for line in f:
# Do something - extract fields from line.
# Do something else - extract fields from line.
# Oh noes! Raise exception.
However, in the "Do something" section - I need access to the match object itself, so that I can strip out certain fields from the line.
Is it possible to somehow test for a match, as well as do assignment of the re match object to a variable?
if expression1.match(line) = results:
Obviously the above won't work - however, is there a Pythonic way to tackle this?
What I'm trying to avoid is this:
results = expression1.match(line)
which I assume would call the regex match against the line twice - and when I'm dealing with a huge amount of log lines, slow things down.
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