Re: check if regeular expression has results
On Thu, 09 Aug 2007 05:58:22 -0700, shahargs wrote: I'm looking for the best way to check if regular expression return true (it's mean - there is a match). for example, i want if that check if this regular expression: .*born.*to.* has a match. What's the way to do that simply? Simply use an ``if`` on the result of the search or match. If the regular expression doesn't match `None` is returned, which is `False` in a boolean context, otherwise a match object is returned, which is `True` in a boolean context. Ciao, Marc 'BlackJack' Rintsch -- http://mail.python.org/mailman/listinfo/python-list
Re: check if regeular expression has results
On 8/9/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi, I'm looking for the best way to check if regular expression return true (it's mean - there is a match). for example, i want if that check if this regular expression: .*born.*to.* has a match. What's the way to do that simply? How about import re re.match(.*born.*to, This is a test) re.match(.*born.*to.*, This test was born so that it worked too.) (Try these at the python prompt) The first call to 're.match()' returns 'None' which will fail an if test. The second one returns a match object, which evaluates to TRUE in an if test. --wpd -- http://mail.python.org/mailman/listinfo/python-list
Re: check if regeular expression has results
On 2007-08-09, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi, I'm looking for the best way to check if regular expression return true (it's mean - there is a match). for example, i want if that check if this regular expression: .*born.*to.* has a match. What's the way to do that simply? Newgroups are a poor substitute for the docs. For one thing, newsgroups sometimes contain cranky people who say, RTFM! The docs will never do that. -- Neil Cerutti -- http://mail.python.org/mailman/listinfo/python-list
Re: check if regeular expression has results
[EMAIL PROTECTED] wrote: Hi, I'm looking for the best way to check if regular expression return true (it's mean - there is a match). for example, i want if that check if this regular expression: .*born.*to.* has a match. What's the way to do that simply? A failed match returns None. A successful match returns a match object. So the easiest way to check for a successful match is pat = re.compile(...) m = pat.match(some_string) if m: ... you got a match ... else: ... you didn't ... regards Steve -- Steve Holden+1 571 484 6266 +1 800 494 3119 Holden Web LLC/Ltd http://www.holdenweb.com Skype: holdenweb http://del.icio.us/steve.holden --- Asciimercial -- Get on the web: Blog, lens and tag the Internet Many services currently offer free registration --- Thank You for Reading - -- http://mail.python.org/mailman/listinfo/python-list
Re: check if regeular expression has results
Neil Cerutti a écrit : On 2007-08-09, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Hi, I'm looking for the best way to check if regular expression return true (it's mean - there is a match). for example, i want if that check if this regular expression: .*born.*to.* has a match. What's the way to do that simply? Newgroups are a poor substitute for the docs. For one thing, newsgroups sometimes contain cranky people who say, RTFM! The docs will never do that. And for completness, here are the relevant parts of TheFineManual(tm): http://docs.python.org/lib/module-re.html http://www.amk.ca/python/howto/regex/ -- http://mail.python.org/mailman/listinfo/python-list
