On Jun 29, 8:00 am, Thomas Jollans <tho...@jollans.com> wrote: > On 06/29/2010 03:41 AM, CM wrote: > > > > > I'm looking for a good way to check whether a certain string is > > valid. It is a string representation of a Python timedelta object, > > like this: '0:00:03.695000' > > > (But the first place, the hours, could also be double digits) > > > In trying to figure out how to validate that, I saw this page which > > creates a parseTimeDelta(s) function, which takes that kind of string > > and returns a timedelta object: > > >http://kbyanc.blogspot.com/2007/08/python-reconstructing-timedeltas-f... > > (and I agree that this sort of function should come standard with > > datetime) > > > I modified the code to accept microseconds, too, and I can use it now > > by trying to parse my candidate string and if it throws an exception, > > rejecting that string as invalid. It works fine on strings that are > > not even close to my format, like '0 min'. But it doesn't throw an > > exception on something like: '0:00:03.695000extrajunk' > > > I'd like it to be pickier than that with the validation and only > > accept strings which are truly string representations of timedelta > > objects. But I have not learned regex yet, so am not sure how to > > modify parseTimeDetla so it wouldn't work with > > '0:00:03.695000extrajunk'. > > > My question: is there a simple way to modify the parseTimeDelta so > > that it will work ONLY with a string that would be the string > > representation of a timedelta object? > > If you want the end of the regexp to correspond to the end of the > string, add a "$" at the end of the regexp.
Thanks. That works to do what I need. Che -- http://mail.python.org/mailman/listinfo/python-list
