[Tutor] validation

[Michael]

Thanks Everybody

I now have several methods in my arsenal and they all look quite simple, 
now that I know. Just wondering, when would you use isInstance()?

Thanks

Alan Gauld wrote:
> "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.
>
>
>