[Tutor] validation
Alan Gauld
alan.gauld at btinternet.com
Mon Aug 27 12:54:10 CEST 2007
"Michael" <python at mrfab.info> wrote
> to check and make sure that an integer is entered and the program
> not
> crashing when a naughty user enters a character instead.
John F has already pointed you to the use of try/except for this,
however...
> trying to use the Type() function but I cannot work out how to check
> the
> return value? Caomparing it to 'int' or 'str' isn't working,
The easiest way is to compare to another type:
x = 42
if type(x) == type(int()):
or even
if type(x) == type(2):
Or you can use the types module:
if type(x) == types.IntType
But for your purposes the Python idiom of its 'better to ask
forgiveness than permission' applies.
--
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld
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