On Wed, Jan 12, 2005, Tzu-Ming Chern wrote:
>
>Hi Python Tutors,
>
>Is there a more elegant solution to matching multiple regular expressions?
>
>An example would be:
>
>lista = ['hello','goodbye','bubblegum'] # lista would contain my regular
>expressions I want to match
>
>My file would look something like this:
>
>line1: blah blah aldkfslfjlajf hello
>line2: blah blah dkajfldjfjkdsfalj zippo
>line3: blah blah lkdsjalkfjkj bubblegum
>line4: blah blah skdjflsdjlkj ditto
>
>What I want to do is to only print out those lines that don't contain
>those patterns included in lista. So that would be lines 2 and 4.
>
>Any suggestions?
If the list of regular expressions is at all large, or you want a
general solution, something like this might be appropriate:
import re
relist = (
re.compile(r'pattern1'),
re.compile(r'pattern2'),
...
)
fh = open('somefile')
for line in fh.xreadlines():
for regex in relist:
if regex.search(line): break
else: print line
Bill
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