[Image-SIG] assigning commands to a variable

[Chris Cogdon]

On Aug 24, 2004, at 08:16, francesco wrote:

> Hi,
> is it possible to assign a string to a variable and then make python 
> understand that it is not just text but a command?
>
> The actual problem is that I want to use the PIL filters, which are 
> called
>
> <myimage>.filter(ImageFilter.<filter_type>)
>
> filter_type can be a number of different filter types, like for 
> example "BLUR" or "SMOOTH".
> My user chooses the filter type and then I have to put it in the 
> function
>
> a = "BLUR"
> and then
>
> <myimage>.filter(ImageFilter.a)
>
> but of course that does not work, as "a" is not recognized as a 
> ImageFilter module and also assigning
>
> a = "ImageFilter.BLUR"
>
> does not work.  Is there a trick? (I am obviously not an ace as 
> programmer)

try using getattr.

<myimage>.filter( getattr ( ImageFilter, a ) )


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