[Tutor] continuous running of a method

[Greg Bair]

On 08/23/2010 01:10 AM, James Mills wrote:
> On Mon, Aug 23, 2010 at 3:00 PM, Greg Bair<gregbair at gmail.com>  wrote:
>    
>> I have a method (I'll call it foo) that will either return None or an object
>> depending on a random value generated.  What I want to happen is that if I
>> call foo(), i.e, f = foo() and it returns None, to re-call it until it
>> returns something else.  I would think this would be done with a while loop,
>> but can't seem to get the details right.
>>
>> Any help would be greatly appreciated.
>>      
> Quite simple really, and yes you are right. Use a while loop:
>
>    
>>>> from random import seed, random
>>>> from time import time
>>>> seed(time())
>>>> def foo():
>>>>          
> ...     if 0.5<  random()<  0.6:
> ...             return True
> ...
>    
>>>> x = foo()
>>>> while x is None:
>>>>          
> ...     x = foo()
> ...
>    
>>>> x
>>>>          
> True
>    
>>>>          
> cheers
> James
>
>    
I don't know why I didn't think of that.  Thanks.