def clean_upload(self):
        django_file = None
        payload = self.cleaned_data.get('upload')
        if payload:
            try:
                django_file = ContentFile(base64.b64decode(payload))
            except TypeError as error:
                raise forms.ValidationError(error % 'Inproperly encoded file: %s')
        return django_file
dataset/ETHPy150Open zbyte64/django-hyperadmin/hyperadmin/resources/storages/forms.py/Base64UploadForm.clean_upload/swapped operands of `%`