[Tutor] Date validation?

[bob gailer]

Eric Dorsey wrote:
> Greetings,
> I have a program where I ask a user to enter a date in format 
> YYYY-MM-DD, and get a string like: '2008-10-25'
>
> Can anyone tell me how I would verify this is a real date before 
> allowing it to be passed on to the next part of the program?

Take a look at the time module and it's strptime function.

 >>> import time
 >>> time.strptime("2008-10-125", "%Y-%m-%d")
(2008, 10, 25, 0, 0, 0, 5, 299, -1)
 >>> time.strptime("2008-10-125", "%Y-%m-%d")
Traceback (most recent call last):
  File "<interactive input>", line 1, in <module>
  File "H:\Python25\lib\_strptime.py", line 313, in strptime
    data_string[found.end():])
ValueError: unconverted data remains: 5

-- 
Bob Gailer
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