langchain/document_loaders/weather.py/WeatherDataLoader/from_params
class WeatherDataLoader:    def from_params(
        cls, places: Sequence[str], *, openweathermap_api_key: Optional[str] = None
    ) -> WeatherDataLoader:
        client = OpenWeatherMapAPIWrapper(openweathermap_api_key=openweathermap_api_key)
        return cls(client, places)