Flask web 14章测试出现错误提示LookupError: the converter 'init' does not exist

第十四章调试时出现错误

raise LookupError('the converter %r does not exist' % converter_name)
LookupError: the converter 'init' does not exist

检查发现是

@api.route('/posts/', methods=['PUT'])

写成了

@api.route('/posts/', methods=['PUT'])