code: def generate(self, input: str, **kwargs):
      output = get_response(
          post_http_request(input, self.url, **kwargs)
      )[0]
      return output[len(input) :]
  
imports: from typing import Any, List, Mapping, Optional
  import torch
  from colossalqa.local.utils import get_response, post_http_request
  from colossalqa.mylogging import get_logger
  from langchain.callbacks.manager import CallbackManagerForLLMRun
  from langchain.llms.base import LLM
  from transformers import AutoModelForCausalLM, AutoTokenizer
label_desc: Use image node_id 2 for calling the VllmAPI obj's underlying member method code with example usage: obj.generate(input) and returns: output