Filter to discard facebook invitations
Why doesn't the following discard_these_nonmembers filter work for facebook invitations:
^[!@]*@facebookmail.com
-John
John List wrote:
Why doesn't the following discard_these_nonmembers filter work for facebook invitations:
^[!@]*@facebookmail.com
Because while it is a valid Python regexp <http://docs.python.org/library/re.html>, it doesn't say what you mean.
The correct way to say what I think you mean by that is
^[^@]*@facebookmail.com
I.e. [^@] matches anything which is not '@'; [!@] matches just '!' or '@'.
However, I would use
^.*[@.]facebookmail\.com$
to match any address in the facebookmail.com domain or a sub-domain or
^.*@facebookmail\.com$
to match addresses in only the facebookmail.com domain.
-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
On Apr 4, 2010, at 10:22 AM, John List wrote:
Why doesn't the following discard_these_nonmembers filter work for facebook invitations:
^[!@]*@facebookmail.com
In addition to what Mark has already pointed out, I thought I would add that the python regex documentation ( http://docs.python.org/library/re.html#re-syntax ) has a helpful routine for debugging regexen right on the command-line, e.g.
Python 2.6.4 (r264:75706, Feb 14 2010, 14:03:47) [C] on sunos5 Type "help", "copyright", "credits" or "license" for more information.
import re def displaymatch(match): ... if match is None: ... return None ... return '<Match: %r, groups=%r>' % (match.group(), match.groups()) ... valid = re.compile(r"^[!@]*@facebookmail.com") displaymatch(valid.match("foobar@facebookmail.com")) displaymatch(valid.match("foo!bar@facebookmail.com")) displaymatch(valid.match("!foo!bar@facebookmail.com")) displaymatch(valid.match("@facebookmail.com")) "<Match: '@facebookmail.com', groups=()>" displaymatch(valid.match("!@facebookmail.com")) "<Match: '!@facebookmail.com', groups=()>" valid = re.compile(r"^.*[@.]facebookmail\.com") displaymatch(valid.match("foobar@facebookmail.com")) "<Match: 'foobar@facebookmail.com', groups=()>" displaymatch(valid.match("foobar@bar.facebookmail.com")) "<Match: 'foobar@bar.facebookmail.com', groups=()>"
I always find it handy since I like to be sure that I'm not matching more (or less) than I bargained for. :)
e.
participants (3)
-
Elaine Ashton -
John List -
Mark Sapiro