langChain 的BaseLLMOutputParser方法报错？

Question

在使用langChain的BaseLLMOutputParser方法时报错

"errorMessage": "this.parseResult is not a function",

const outputParser = new BaseLLMOutputParser(schema());
   const memory = new BufferWindowMemory({ k: 3 });
   const chain = new ConversationChain({
      llm: model,
      memory: memory,
      outputParser: outputParser,
   });
   
   const output = await chain.call({
      input: "以“把大象装进冰箱总共分几步”为题，出一道4个选项的选择题",
   });
   console.log("output", output);

Answer 1

class MyLLMOutputParser extends BaseLLMOutputParser {
    parseResult(result) {
      //解析逻辑
    }
}

然后：

const outputParser = new MyLLMOutputParser(schema());
const memory = new BufferWindowMemory({ k: 3 });
const chain = new ConversationChain({
   llm: model,
   memory: memory,
   outputParser: outputParser,
});


const output = await chain.call({
   input: "以“把大象装进冰箱总共分几步”为题，出一道4个选项的选择题",
});
console.log("output", output);