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51 lines
1.6 KiB
Python
51 lines
1.6 KiB
Python
"""Simple reader that reads weather data from OpenWeatherMap API"""
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from __future__ import annotations
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from datetime import datetime
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from typing import Iterator, List, Optional, Sequence
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from langchain.docstore.document import Document
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from langchain.document_loaders.base import BaseLoader
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from langchain.utilities.openweathermap import OpenWeatherMapAPIWrapper
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class WeatherDataLoader(BaseLoader):
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"""Weather Reader.
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Reads the forecast & current weather of any location using OpenWeatherMap's free
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API. Checkout 'https://openweathermap.org/appid' for more on how to generate a free
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OpenWeatherMap API.
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"""
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def __init__(
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self,
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client: OpenWeatherMapAPIWrapper,
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places: Sequence[str],
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) -> None:
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"""Initialize with parameters."""
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super().__init__()
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self.client = client
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self.places = places
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@classmethod
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def from_params(
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cls, places: Sequence[str], *, openweathermap_api_key: Optional[str] = None
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) -> WeatherDataLoader:
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client = OpenWeatherMapAPIWrapper(openweathermap_api_key=openweathermap_api_key)
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return cls(client, places)
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def lazy_load(
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self,
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) -> Iterator[Document]:
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"""Lazily load weather data for the given locations."""
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for place in self.places:
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metadata = {"queried_at": datetime.now()}
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content = self.client.run(place)
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yield Document(page_content=content, metadata=metadata)
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def load(
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self,
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) -> List[Document]:
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"""Load weather data for the given locations."""
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return list(self.lazy_load())
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