automatically set field values in django using function

[Xristos Xristoou]

I need t define some values of fields automatically in my model using function. my function get input image path and calculate and I need that calculation results to define my database fields in Django.
but first the upload image need to get the path in server and after i can to define the values..

i will test this but myfunc cant understand the image path from upload image.
here the code :

def myview(request):
    uploadimages = UploadImagesForm(request.POST or None, request.FILES or None)
    if uploadimages.is_valid():
        # Get the images that have been browsed
        if request.FILES.get('multipleimages', None) is not None:
            images = request.FILES.getlist('multipleimages')
            for image in images:
                instance = MyModel.objects.create(field1=request.user, field2=image)
                instance.field3 = myfunc(image)
                instance.field4 = myfunc(image)
                instance.save()