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Checking for valid date input and convert appropriately

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  Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 11:38 -0800
    Re: Checking for valid date input and convert appropriately MRAB <python@mrabarnett.plus.com> - 2013-02-21 20:14 +0000
      Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 13:22 -0800
        Re: Checking for valid date input and convert appropriately MRAB <python@mrabarnett.plus.com> - 2013-02-21 21:46 +0000
        Re: Checking for valid date input and convert appropriately "Michael Ross" <gmx@ross.cx> - 2013-02-21 23:03 +0100
          Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 15:08 -0800
            Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 15:18 -0800
              Re: Checking for valid date input and convert appropriately Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-02-21 23:30 +0000
            Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 15:18 -0800
            Re: Checking for valid date input and convert appropriately "Michael Ross" <gmx@ross.cx> - 2013-02-22 00:37 +0100
              Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 16:12 -0800
                Re: Checking for valid date input and convert appropriately "Michael Ross" <gmx@ross.cx> - 2013-02-22 01:57 +0100
                  Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 20:34 -0800
                  Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 20:34 -0800
                    Re: Checking for valid date input and convert appropriately rob.marshall17@gmail.com - 2013-02-21 22:20 -0800
                      Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 02:06 -0800
                      Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 02:06 -0800
                    Re: Checking for valid date input and convert appropriately rob.marshall17@gmail.com - 2013-02-21 22:20 -0800
                      Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 03:01 -0800
                        Re: Checking for valid date input and convert appropriately Lele Gaifax <lele@metapensiero.it> - 2013-02-22 13:03 +0100
                          Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 05:24 -0800
                            Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 05:28 -0800
                            Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 05:28 -0800
                            Re: Checking for valid date input and convert appropriately Lele Gaifax <lele@metapensiero.it> - 2013-02-22 14:35 +0100
                              Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 07:07 -0800
                                Re: Checking for valid date input and convert appropriately Lele Gaifax <lele@metapensiero.it> - 2013-02-22 16:25 +0100
                                  Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 09:38 -0800
                                    Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 09:39 -0800
                                    Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 09:39 -0800
                                  Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 09:38 -0800
                                Re: Checking for valid date input and convert appropriately Tim Chase <python.list@tim.thechases.com> - 2013-02-22 10:18 -0600
                              Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 07:07 -0800
                            Re: Checking for valid date input and convert appropriately Chris Angelico <rosuav@gmail.com> - 2013-02-23 01:03 +1100
                            Re: Checking for valid date input and convert appropriately Andreas Perstinger <andipersti@gmail.com> - 2013-02-22 15:10 +0100
                          Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 05:24 -0800
                      Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 03:01 -0800
                        Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 03:45 -0800
                        Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-22 03:45 -0800
              Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 16:12 -0800
          Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 15:08 -0800
      Re: Checking for valid date input and convert appropriately Ferrous Cranus <nikos.gr33k@gmail.com> - 2013-02-21 13:22 -0800

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#39559

Τη Παρασκευή, 22 Φεβρουαρίου 2013 2:03:39 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> 
> 
> > I'am thinking if somehting like the follwoing work:
> 
> >
> 
> > if( task and ( price and price.isdigit() and price.__len__() <= 3 ) and ( date and eval( datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') ) ) ):
> 
> 
> 
> a) you should not (usually) call “dunder methods” directly, as they are
> 
>    (usually) exposed by builtin functions::
> 
> 
> 
>      obj.__len__() => len(obj)
> 
> 
> 
> b) what's the point of the eval() call above? When the strptime()
> 
>    succeds, the following strftime() call always returns a string,
> 
>    otherwise it will raise an exception and both the strftime() and the
> 
>    outer eval() won't be called.
> 
> 
> 
> Should I write the above, I'd go for having two helper functions, for
> 
> example:: 
> 
> 
> 
>   def price_is_valid(price):
> 
>     return price and price.isdigit() and len(price) <= 3
> 
> 
> 
>   def date_is_valid(date):
> 
>     try:
> 
>       datetime.strptime(date, '%d %m %Y')
> 
>     except (TypeError, ValueError):
> 
>       return False
> 
>     else:
> 
>       return True
> 
> 
> 
>   ...
> 
> 
> 
>   if task and price_is_valid(price) and date_is_valid(date):
> 
>     ...
> 
> 
> 
> hth,
> 
> ciao, lele.
> 
> -- 
> 
> nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

Let me ask it like this:
How can i avoid using try: except: for checkign the date but instead check it with an if statement:

if ( datetime.strptime(date, '%d %m %Y') ):
     date = datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d')
else:
     print( "Date wasn't entered properly" )

I'am trying this but if user entered date is noit on the acceptible format it raises an exception. 
If i surround it with eval() its still raises an excpetion.

if ( datetime.strptime(date, '%d %m %Y') ):
     date = datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d')
else:
     print( "Date wasn't entered properly" )

How can i write that with an if suppresing the errors if any?

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#39560

i made a liitle typo at the ned, i meant this:

if ( eval( datetime.strptime(date, '%d %m %Y')  ) ): 
     date = datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') 
else: 
     print( "Date wasn't entered properly" ) 

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#39561

i made a liitle typo at the ned, i meant this:

if ( eval( datetime.strptime(date, '%d %m %Y')  ) ): 
     date = datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') 
else: 
     print( "Date wasn't entered properly" ) 

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#39563

Ferrous Cranus <nikos.gr33k@gmail.com> writes:

> Let me ask it like this:
> How can i avoid using try: except: for checkign the date but instead check it with an if statement:

Let me answer this way: you can't, without resorting to the simple
helper functions I wrote in my previous message. 

Why do you dislike that solution?

ciao, lele.
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

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#39576

Τη Παρασκευή, 22 Φεβρουαρίου 2013 3:35:31 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> 
> 
> > Let me ask it like this:
> 
> > How can i avoid using try: except: for checkign the date but instead check it with an if statement:
> 
> 
> 
> Let me answer this way: you can't, without resorting to the simple
> 
> helper functions I wrote in my previous message. 
> 
> 
> 
> Why do you dislike that solution?
> 
> 
> 
> ciao, lele.
> 
> -- 
> 
> nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

ok, i'll just use the try: except: i was just thinking putting them all in the same if() statemt but apparently it cant be done.

Actually it can, but instead of try: i have to create a function:

def is_sane_date(date):
    parts = [int(part) for part in date.split() if part.isdigit()]
    if len(parts) == 3 and \
         1 <= parts[0] <= 31 and \
         1 <= parts[1] <= 12 and \
         1900 <= parts[2] <= 2100:
        return True
    return False

if is_sane_date(date):
    # ...

but the try: solution is much more less hassle.

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#39578

Ferrous Cranus <nikos.gr33k@gmail.com> writes:

> but the try: solution is much more less hassle.

... not to mention it is more effective than your simplicistic check :-)

ciao, lele.
-- 
nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

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#39597

Τη Παρασκευή, 22 Φεβρουαρίου 2013 5:25:41 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> 
> 
> > but the try: solution is much more less hassle.
> 
> 
> 
> ... not to mention it is more effective than your simplicistic check :-)
> 
> 
> 
> ciao, lele.
> 
> -- 
> 
> nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

:-)

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#39599

Τη Παρασκευή, 22 Φεβρουαρίου 2013 7:38:47 μ.μ. UTC+2, ο χρήστης Ferrous Cranus έγραψε:
> Τη Παρασκευή, 22 Φεβρουαρίου 2013 5:25:41 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> 
> > Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> > 
> 
> > 
> 
> > 
> 
> > > but the try: solution is much more less hassle.
> 
> > 
> 
> > 
> 
> > 
> 
> > ... not to mention it is more effective than your simplicistic check :-)
> 
> > 
> 
> > 
> 
> > 
> 
> > ciao, lele.
> 
> > 
> 
> > -- 
> 
> > 
> 
> > nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> > 
> 
> > real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> > 
> 
> > lele@metapensiero.it  |                 -- Fortunato Depero, 1929.
> 
> 
> 
> :-)

True :-)

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#39600

Τη Παρασκευή, 22 Φεβρουαρίου 2013 7:38:47 μ.μ. UTC+2, ο χρήστης Ferrous Cranus έγραψε:
> Τη Παρασκευή, 22 Φεβρουαρίου 2013 5:25:41 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> 
> > Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> > 
> 
> > 
> 
> > 
> 
> > > but the try: solution is much more less hassle.
> 
> > 
> 
> > 
> 
> > 
> 
> > ... not to mention it is more effective than your simplicistic check :-)
> 
> > 
> 
> > 
> 
> > 
> 
> > ciao, lele.
> 
> > 
> 
> > -- 
> 
> > 
> 
> > nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> > 
> 
> > real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> > 
> 
> > lele@metapensiero.it  |                 -- Fortunato Depero, 1929.
> 
> 
> 
> :-)

True :-)

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#39598

Τη Παρασκευή, 22 Φεβρουαρίου 2013 5:25:41 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> 
> 
> > but the try: solution is much more less hassle.
> 
> 
> 
> ... not to mention it is more effective than your simplicistic check :-)
> 
> 
> 
> ciao, lele.
> 
> -- 
> 
> nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

:-)

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#39585

On 2013-02-22 07:07, Ferrous Cranus wrote:
> Actually it can, but instead of try: i have to create a function:
> 
> def is_sane_date(date):
>     parts = [int(part) for part in date.split() if part.isdigit()]
>     if len(parts) == 3 and \
>          1 <= parts[0] <= 31 and \
>          1 <= parts[1] <= 12 and \
>          1900 <= parts[2] <= 2100:
>         return True
>     return False

Then you have things like "31 2 2013" being a valid date.  Also, the
hard caps at 1900 and 2100 are both pretty short-sighted.  To the
best of my knowledge, there are valid dates outside that date
range :-)

-tkc

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#39584

Τη Παρασκευή, 22 Φεβρουαρίου 2013 3:35:31 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> 
> 
> > Let me ask it like this:
> 
> > How can i avoid using try: except: for checkign the date but instead check it with an if statement:
> 
> 
> 
> Let me answer this way: you can't, without resorting to the simple
> 
> helper functions I wrote in my previous message. 
> 
> 
> 
> Why do you dislike that solution?
> 
> 
> 
> ciao, lele.
> 
> -- 
> 
> nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

ok, i'll just use the try: except: i was just thinking putting them all in the same if() statemt but apparently it cant be done.

Actually it can, but instead of try: i have to create a function:

def is_sane_date(date):
    parts = [int(part) for part in date.split() if part.isdigit()]
    if len(parts) == 3 and \
         1 <= parts[0] <= 31 and \
         1 <= parts[1] <= 12 and \
         1900 <= parts[2] <= 2100:
        return True
    return False

if is_sane_date(date):
    # ...

but the try: solution is much more less hassle.

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#39566

On Sat, Feb 23, 2013 at 12:35 AM, Lele Gaifax <lele@metapensiero.it> wrote:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
>
>> Let me ask it like this:
>> How can i avoid using try: except: for checkign the date but instead check it with an if statement:
>
> Let me answer this way: you can't, without resorting to the simple
> helper functions I wrote in my previous message.
>
> Why do you dislike that solution?

This is very similar to the previous threads that the OP has engaged
in recently. He asks a question of the form "How can I do X, without
using facility Y" where Y is the obvious way to do X.

http://redwing.hutman.net/~mreed/warriorshtm/ferouscranus.htm

My days of not taking him seriously are certainly coming to a middle.

ChrisA

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#39568

Lele Gaifax <lele@metapensiero.it> wrote:
>Ferrous Cranus <nikos.gr33k@gmail.com> writes:
>
>> Let me ask it like this:
>> How can i avoid using try: except: for checkign the date but instead
>> check it with an if statement:
>
>Let me answer this way: you can't, without resorting to the simple
>helper functions I wrote in my previous message. 
>
>Why do you dislike that solution?

Ferrous Cranus has proven in previous discussions (search the archives)
that he doesn't like common-sense solutions and insists on doing it his
own way (although his methods are either wrong or impossible).

Don't waste your time.

Bye, Andreas

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#39562

Τη Παρασκευή, 22 Φεβρουαρίου 2013 2:03:39 μ.μ. UTC+2, ο χρήστης Lele Gaifax έγραψε:
> Ferrous Cranus <nikos.gr33k@gmail.com> writes:
> 
> 
> 
> > I'am thinking if somehting like the follwoing work:
> 
> >
> 
> > if( task and ( price and price.isdigit() and price.__len__() <= 3 ) and ( date and eval( datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') ) ) ):
> 
> 
> 
> a) you should not (usually) call “dunder methods” directly, as they are
> 
>    (usually) exposed by builtin functions::
> 
> 
> 
>      obj.__len__() => len(obj)
> 
> 
> 
> b) what's the point of the eval() call above? When the strptime()
> 
>    succeds, the following strftime() call always returns a string,
> 
>    otherwise it will raise an exception and both the strftime() and the
> 
>    outer eval() won't be called.
> 
> 
> 
> Should I write the above, I'd go for having two helper functions, for
> 
> example:: 
> 
> 
> 
>   def price_is_valid(price):
> 
>     return price and price.isdigit() and len(price) <= 3
> 
> 
> 
>   def date_is_valid(date):
> 
>     try:
> 
>       datetime.strptime(date, '%d %m %Y')
> 
>     except (TypeError, ValueError):
> 
>       return False
> 
>     else:
> 
>       return True
> 
> 
> 
>   ...
> 
> 
> 
>   if task and price_is_valid(price) and date_is_valid(date):
> 
>     ...
> 
> 
> 
> hth,
> 
> ciao, lele.
> 
> -- 
> 
> nickname: Lele Gaifax | Quando vivrò di quello che ho pensato ieri
> 
> real: Emanuele Gaifas | comincerò ad aver paura di chi mi copia.
> 
> lele@metapensiero.it  |                 -- Fortunato Depero, 1929.

Let me ask it like this:
How can i avoid using try: except: for checkign the date but instead check it with an if statement:

if ( datetime.strptime(date, '%d %m %Y') ):
     date = datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d')
else:
     print( "Date wasn't entered properly" )

I'am trying this but if user entered date is noit on the acceptible format it raises an exception. 
If i surround it with eval() its still raises an excpetion.

if ( datetime.strptime(date, '%d %m %Y') ):
     date = datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d')
else:
     print( "Date wasn't entered properly" )

How can i write that with an if suppresing the errors if any?

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#39542

Τη Παρασκευή, 22 Φεβρουαρίου 2013 8:20:20 π.μ. UTC+2, ο χρήστης rob.mar...@gmail.com έγραψε:
> The datetime function: strptime() DOES check the date for validity. So try something like:
> 
> 
> 
> from datetime import datetime
> 
> 
> 
> def get_date():
> 
>   while True:
> 
>     try:
> 
>       date_in = raw_input("Enter date (dd mm yyyy): ")
> 
>       date_out = datetime.strptime(date_in,"%d %m %Y").strftime("%Y-%m-%d")
> 
>       return date_out
> 
>     except ValueError:
> 
>       print "Invalid date: {}, try again...".format(date_in)

I'am thinking if somehting like the follwoing work:

if( task and ( price and price.isdigit() and price.__len__() <= 3 ) and ( date and eval( datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') ) ) ):

[toc] | [prev] | [next] | [standalone]

#39551

> I'am thinking if somehting like the follwoing work:
> 
> if( task and ( price and price.isdigit() and price.__len__() <= 3 ) and ( date and eval( datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') ) ) ):

I just tried it out this workaround so to avoid having an extra try: except: but if the user doesnt enter the date properly it still raises a ValueError exception.

Is there a way to still use the if statemnt and somehow supress the message nd let else: handle it somehow?

thank you.

[toc] | [prev] | [next] | [standalone]

#39553

> I'am thinking if somehting like the follwoing work:
> 
> if( task and ( price and price.isdigit() and price.__len__() <= 3 ) and ( date and eval( datetime.strptime(date, '%d %m %Y').strftime('%Y-%m-%d') ) ) ):

I just tried it out this workaround so to avoid having an extra try: except: but if the user doesnt enter the date properly it still raises a ValueError exception.

Is there a way to still use the if statemnt and somehow supress the message nd let else: handle it somehow?

thank you.

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#39501

Please i have been trying hours for this:
	
try:
		datetime.strptime(date, '%d m% %Y')
		date = date.strftime('%Y-%m-%d')
	except:
		print( "<h2>date not propetly entered." )
		sys.exit(0)
===========================

the user enters 21 02 2013

a) i just need to check if its in accepted format
b) then truncate the given date to mysql format

That's all i want to do and i cant make it work. Plese tell me how to write this.

I have tried anything i can think of.

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#39486

Τη Παρασκευή, 22 Φεβρουαρίου 2013 12:03:59 π.μ. UTC+2, ο χρήστης Michael Ross έγραψε:
> On Thu, 21 Feb 2013 22:22:15 +0100, Ferrous Cranus <nikos.gr33k@gmail.com>  
> 
> wrote:
> 
> 
> 
> > Τη Πέμπτη, 21 Φεβρουαρίου 2013 10:14:13 μ.μ. UTC+2, ο χρήστης MRAB  
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> > έγραψε:
> 
> >> On 2013-02-21 19:38, Ferrous Cranus wrote:
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> >>
> 
> >> > import datetime from datetime
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> >>
> 
> >>
> 
> >>
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> >> Should be:
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> >>
> 
> >>
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> >>
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> >> from datetime import datetime
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> >>
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> >>
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> >>
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> >> >
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> >>
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> >> > try:
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> >>
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> >> >      datetime.strptime( date, '%d %m %Y' )
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> >>
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> >>
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> >>
> 
> >> That parses the date and discards the result.
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> >>
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> >>
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> >>
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> >> >      date = date.strptime( '%Y-%m-%d' )
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> >>
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> >>
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> >>
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> >> 'date' is a string, it doesn't have a 'strptime' method.
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> >>
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> >>
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> >>
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> >> When you parsed the date you got a datetime object; _that_ has the
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> >>
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> >> 'strptime' method.
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> >
> 
> > I don't need to store the date i just want to make sure is entered  
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> > correctly.
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> > I would like to have the user type the date like
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> >
> 
> > 21 02 2013
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> > and then convert it to 2013-02-21 because thats how mysql wants the date  
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> > in order to store it.
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> > Please show me how to write this.
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> >
> 
> > Also, can you show me how to write it that if so even if the user  
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> > entered date is wrong it doesn't just crash the cgi-script?i know i can  
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> > use tr: expect: but i want to avoid it, somehow i need to check the date  
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> > in the same if statemnt like i do with the other user defined varibles  
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> > for validity.
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> >
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> 
> 
> You *have* to try/expect in order to not have the script crash.
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> Think user typo: 21 02 2ß13
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> 
> 
> Personally, I'd use a javascript on the html so users can't POST invalid  
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> dates.
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> I use mootools for that. It accepts 21/02/2013, 21-02-2013 and 21.02.13 as  
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> input,
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> 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__() <= 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 ?

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