On 4 Apr, 02:14, bwgoudey <bwgou...@gmail.com> wrote:
> I have a lot of if/elif cases based on regular expressions that I'm using to
> filter stdin and using print to stdout. Often I want to print something
> matched within the regular expression and the moment I've got a lot of cases
> like:
>
> ...
> elif re.match("^DATASET:\s*(.+) ", line):
> m=re.match("^DATASET:\s*(.+) ", line)
> print m.group(1))
>
> which is ugly because of the duplication but I can't think of a nicer of way
> of doing this that will allow for a lot of these sorts of cases. Any
> suggestions?
> --
> View this message in
> context:http://www.nabble.com/Best-way-to-extract-from-regex-in-if-statement-...
> Sent from the Python - python-list mailing list archive at Nabble.com.
How about something like:
your_regexes = [
re.compile('rx1'),
re.compile('rx2'),
# etc....
]
for line in lines:
for rx in your_regexes:
m = rx.match(line)
if m:
print m.group(1)
break # if only the first matching regex is required,
otherwise leave black for all
Untested, but seems to make sense
hth,
Jon
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