def post(self): answer = [] for i in range(0, len(self.get_uploads())): upload = self.get_uploads()[i] my_file = File() my_file.blobKey = upload.key() my_file.file_path = str(my_file.blobKey) my_file.content_type = upload.content_type my_file.file_name = upload.filename my_file.put() answer.append(my_file.to_json()) self.response.out.write(json.dumps(answer)) self.response.out.status = 200