def to_python(self, data):
        if data is not None:
            if hasattr(data, 'open'):
                data.open()
            return super(VersatileImageFormField, self).to_python(data)
Ensures data is prepped properly before handing off to
dataset/ETHPy150Open WGBH/django-versatileimagefield/versatileimagefield/forms.py/VersatileImageFormField.to_python