Robert Hicks wrote:
> Kent Johnson wrote:
>> Robert Hicks wrote:
>>> idList only has about 129 id numbers in it.
>> That is quite a few times to be searching each line of the file. Try
>> using a regular expression search instead, like this:
>>
>> import re
>> regex = re.compile('|'.join(idList))
>> for line in f2:
>> if regex.search(line):
>> # process a hit
>>
>
> Since I am printing to a file like so:
>
> [id]: [line]
>
> I don't see how I can get the id back out of the regex.search like I
> could in my code.
match = regex.search(line)
if match:
idMatch = match.group()
print idMatch, line
Note this will only find the first id match on a line. If you need to
find multiple matches per line use findall() or finditer() as Dave suggests.
re docs are here:
http://docs.python.org/lib/module-re.html
Kent
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