Source code for langchain.chains.api.openapi.requests_chain
"""request parser."""
import json
import re
from typing import Any
from langchain.chains.api.openapi.prompts import REQUEST_TEMPLATE
from langchain.chains.llm import LLMChain
from langchain.prompts.prompt import PromptTemplate
from langchain.schema import BaseOutputParser
from langchain.schema.language_model import BaseLanguageModel
[docs]class APIRequesterOutputParser(BaseOutputParser):
    """Parse the request and error tags."""
    def _load_json_block(self, serialized_block: str) -> str:
        try:
            return json.dumps(json.loads(serialized_block, strict=False))
        except json.JSONDecodeError:
            return "ERROR serializing request."
[docs]    def parse(self, llm_output: str) -> str:
        """Parse the request 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())
        message_match = re.search(r"```text(.*?)```", llm_output, re.DOTALL)
        if message_match:
            return f"MESSAGE: {message_match.group(1).strip()}"
        return "ERROR making request"
    @property
    def _type(self) -> str:
        return "api_requester"
[docs]class APIRequesterChain(LLMChain):
    """Get the request parser."""
[docs]    @classmethod
    def from_llm_and_typescript(
        cls,
        llm: BaseLanguageModel,
        typescript_definition: str,
        verbose: bool = True,
        **kwargs: Any,
    ) -> LLMChain:
        """Get the request parser."""