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https://github.com/hwchase17/langchain.git
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8516a03a02
This PR upgrades langchain-community to pydantic 2.
* Most of this PR was auto-generated using code mods with gritql
(https://github.com/eyurtsev/migrate-pydantic/tree/main)
* Subsequently, some code was fixed manually due to accommodate
differences between pydantic 1 and 2
Breaking Changes:
- Use TEXTEMBED_API_KEY and TEXTEMBEB_API_URL for env variables for text
embed integrations:
cbea780492
Other changes:
- Added pydantic_settings as a required dependency for community. This
may be removed if we have enough time to convert the dependency into an
optional one.
---------
Co-authored-by: Eugene Yurtsev <eyurtsev@gmail.com>
Co-authored-by: Bagatur <baskaryan@gmail.com>
69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
"""Util that calls Dataherald."""
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from typing import Any, Dict, Optional
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from langchain_core.utils import get_from_dict_or_env
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from pydantic import BaseModel, ConfigDict, model_validator
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class DataheraldAPIWrapper(BaseModel):
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"""Wrapper for Dataherald.
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Docs for using:
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1. Go to dataherald and sign up
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2. Create an API key
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3. Save your API key into DATAHERALD_API_KEY env variable
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4. pip install dataherald
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"""
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dataherald_client: Any #: :meta private:
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db_connection_id: str
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dataherald_api_key: Optional[str] = None
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model_config = ConfigDict(
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extra="forbid",
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)
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@model_validator(mode="before")
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@classmethod
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def validate_environment(cls, values: Dict) -> Any:
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"""Validate that api key and python package exists in environment."""
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dataherald_api_key = get_from_dict_or_env(
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values, "dataherald_api_key", "DATAHERALD_API_KEY"
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)
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values["dataherald_api_key"] = dataherald_api_key
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try:
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import dataherald
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except ImportError:
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raise ImportError(
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"dataherald is not installed. "
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"Please install it with `pip install dataherald`"
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)
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client = dataherald.Dataherald(api_key=dataherald_api_key)
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values["dataherald_client"] = client
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return values
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def run(self, prompt: str) -> str:
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"""Generate a sql query through Dataherald and parse result."""
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from dataherald.types.sql_generation_create_params import Prompt
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prompt_obj = Prompt(text=prompt, db_connection_id=self.db_connection_id)
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res = self.dataherald_client.sql_generations.create(prompt=prompt_obj)
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try:
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answer = res.sql
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if not answer:
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# We don't want to return the assumption alone if answer is empty
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return "No answer"
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else:
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return f"Answer: {answer}"
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except StopIteration:
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return "Dataherald wasn't able to answer it"
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