def save(self):
        tmp_path = self.path + '.tmp'
        with open(tmp_path, 'w') as f:
            f.write(json.dumps(self.body_labels.items()))
        os.rename(tmp_path, self.path)
def draw(self, context):
        layout = self.layout

        userpref = context.user_preferences

        layout.prop(userpref, "active_section", expand=True)