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Newsgroups: comp.lang.python
Date: Thu, 21 Feb 2013 15:08:01 -0800 (PST)
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Subject: Re: Checking for valid date input and convert appropriately
From: Ferrous Cranus <nikos.gr33k@gmail.com>
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Xref: csiph.com comp.lang.python:39486

=CE=A4=CE=B7 =CE=A0=CE=B1=CF=81=CE=B1=CF=83=CE=BA=CE=B5=CF=85=CE=AE, 22 =CE=
=A6=CE=B5=CE=B2=CF=81=CE=BF=CF=85=CE=B1=CF=81=CE=AF=CE=BF=CF=85 2013 12:03:=
59 =CF=80.=CE=BC. UTC+2, =CE=BF =CF=87=CF=81=CE=AE=CF=83=CF=84=CE=B7=CF=82 =
Michael Ross =CE=AD=CE=B3=CF=81=CE=B1=CF=88=CE=B5:
> On Thu, 21 Feb 2013 22:22:15 +0100, Ferrous Cranus <nikos.gr33k@gmail.com=
> =20
>=20
> wrote:
>=20
>=20
>=20
> > =CE=A4=CE=B7 =CE=A0=CE=AD=CE=BC=CF=80=CF=84=CE=B7, 21 =CE=A6=CE=B5=CE=
=B2=CF=81=CE=BF=CF=85=CE=B1=CF=81=CE=AF=CE=BF=CF=85 2013 10:14:13 =CE=BC.=
=CE=BC. UTC+2, =CE=BF =CF=87=CF=81=CE=AE=CF=83=CF=84=CE=B7=CF=82 MRAB =20
>=20
> > =CE=AD=CE=B3=CF=81=CE=B1=CF=88=CE=B5:
>=20
> >> On 2013-02-21 19:38, Ferrous Cranus wrote:
>=20
> >>
>=20
> >> > import datetime from datetime
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> Should be:
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> from datetime import datetime
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> >
>=20
> >>
>=20
> >> > try:
>=20
> >>
>=20
> >> >      datetime.strptime( date, '%d %m %Y' )
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> That parses the date and discards the result.
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> >      date =3D date.strptime( '%Y-%m-%d' )
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> 'date' is a string, it doesn't have a 'strptime' method.
>=20
> >>
>=20
> >>
>=20
> >>
>=20
> >> When you parsed the date you got a datetime object; _that_ has the
>=20
> >>
>=20
> >> 'strptime' method.
>=20
> >
>=20
> > I don't need to store the date i just want to make sure is entered =20
>=20
> > correctly.
>=20
> > I would like to have the user type the date like
>=20
> >
>=20
> > 21 02 2013
>=20
> > and then convert it to 2013-02-21 because thats how mysql wants the dat=
e =20
>=20
> > in order to store it.
>=20
> > Please show me how to write this.
>=20
> >
>=20
> > Also, can you show me how to write it that if so even if the user =20
>=20
> > entered date is wrong it doesn't just crash the cgi-script?i know i can=
 =20
>=20
> > use tr: expect: but i want to avoid it, somehow i need to check the dat=
e =20
>=20
> > in the same if statemnt like i do with the other user defined varibles =
=20
>=20
> > for validity.
>=20
> >
>=20
>=20
>=20
> You *have* to try/expect in order to not have the script crash.
>=20
> Think user typo: 21 02 2=C3=9F13
>=20
>=20
>=20
> Personally, I'd use a javascript on the html so users can't POST invalid =
=20
>=20
> dates.
>=20
> I use mootools for that. It accepts 21/02/2013, 21-02-2013 and 21.02.13 a=
s =20
>=20
> input,
>=20
> and you end up with 21.02.2013 posted to your cgi in any case.

i just want to check for date validity from within ha same if statemnt like=
 i check the other variables and i tried a regualr expression just now:

if( task and ( price and price.isdigit() and price.__len__() <=3D 3 ) and (=
 date and re.search( r'(\d+) (\d+) (\d+)', date ) ) ):

Do i ahve somehting wrong in it?

will the if become true if the user enters 21 02 2013 ?