mirror of
https://github.com/Mintplex-Labs/langchain-python.git
synced 2026-07-16 09:04:27 -04:00
Ankush Gola
d3ec00b566
Co-authored-by: Nuno Campos <nuno@boringbits.io> Co-authored-by: Davis Chase <130488702+dev2049@users.noreply.github.com> Co-authored-by: Zander Chase <130414180+vowelparrot@users.noreply.github.com> Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
48 lines
1.6 KiB
Python
48 lines
1.6 KiB
Python
"""Response parser."""
|
|
|
|
import json
|
|
import re
|
|
from typing import Any
|
|
|
|
from langchain.chains.api.openapi.prompts import RESPONSE_TEMPLATE
|
|
from langchain.chains.llm import LLMChain
|
|
from langchain.llms.base import BaseLLM
|
|
from langchain.prompts.prompt import PromptTemplate
|
|
from langchain.schema import BaseOutputParser
|
|
|
|
|
|
class APIResponderOutputParser(BaseOutputParser):
|
|
"""Parse the response and error tags."""
|
|
|
|
def _load_json_block(self, serialized_block: str) -> str:
|
|
try:
|
|
response_content = json.loads(serialized_block, strict=False)
|
|
return response_content.get("response", "ERROR parsing response.")
|
|
except json.JSONDecodeError:
|
|
return "ERROR parsing response."
|
|
except:
|
|
raise
|
|
|
|
def parse(self, llm_output: str) -> str:
|
|
"""Parse the response and error tags."""
|
|
json_match = re.search(r"```json(.*?)```", llm_output, re.DOTALL)
|
|
if json_match:
|
|
return self._load_json_block(json_match.group(1).strip())
|
|
else:
|
|
raise ValueError(f"No response found in output: {llm_output}.")
|
|
|
|
|
|
class APIResponderChain(LLMChain):
|
|
"""Get the response parser."""
|
|
|
|
@classmethod
|
|
def from_llm(cls, llm: BaseLLM, verbose: bool = True, **kwargs: Any) -> LLMChain:
|
|
"""Get the response parser."""
|
|
output_parser = APIResponderOutputParser()
|
|
prompt = PromptTemplate(
|
|
template=RESPONSE_TEMPLATE,
|
|
output_parser=output_parser,
|
|
input_variables=["response", "instructions"],
|
|
)
|
|
return cls(prompt=prompt, llm=llm, verbose=verbose, **kwargs)
|