[Zope] PIL: can't call same method twice

[David Hassalevris]

Chris wrote:

> Hi,
>
> I encounter a problem, that I can not explain at all:
>
> I have an external method to resize an image (see below). I can call 
> the method without a problem from a script within Zope and it does 
> it's job.
> Hovever, if I call it twice within the same script, I get the error 
> "can not identify image" although the same FileUpload instance is passed.
>
> My (dummy-)script looks something like this:
> # call the ext. method 'resize' one or more times
> x=1                         # does not work for x >1
> image=context.REQUEST.image # passed from a html-form
> for i in range(0,x):
>     foo = context.resize(image, size=size)
>
> the external method 'resize' looks like this:
> def resize(self, image, size=200, resample='ANTIALIAS'):
>    from PIL import Image
>    image=Image.open(image)
>    [...]
>
> I have no idea what the problem could be or where to look.
>
> Any advice would be a greate help.
> Regards Chris

Maybe move this line

image=context.REQUEST.image # passed from a html-form

inside your for loop.  Maybe image is being changed iteratively.
eg,

for i in range(0,x):
    image=context.REQUEST.image # passed from a html-form
    foo = context.resize(image, size=size)

Just a guess,
David