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127 | class OpenWeatherMapToolSpec(BaseToolSpec):
"""Open Weather tool spec."""
spec_functions = ["weather_at_location", "forecast_tomorrow_at_location"]
def __init__(self, key: str, temp_units: str = "celsius") -> None:
"""Initialize with parameters."""
try:
from pyowm import OWM
except ImportError:
raise ImportError(
"The OpenWeatherMap tool requires the pyowm package to be installed. "
"Please install it using `pip install pyowm`."
)
self.key = key
self.temp_units = temp_units
self._owm = OWM(self.key)
self._mgr = self._owm.weather_manager()
def _format_temp(self, temperature: Any, temp_unit: str) -> str:
return (
f" - Current: {temperature['temp']}{temp_unit}\n"
f" - High: {temperature['temp_max']}{temp_unit}\n"
f" - Low: {temperature['temp_min']}{temp_unit}\n"
f" - Feels like: {temperature['feels_like']}{temp_unit}"
)
def _format_weather(
self, place: str, temp_str: str, w: Any, time_str: str = "now"
) -> str:
"""
Format weather response from OpenWeatherMap.
Function thanks to
langchain/utilities/openweathermap.py
"""
detailed_status = w.detailed_status
wind = w.wind()
humidity = w.humidity
rain = w.rain
heat_index = w.heat_index
clouds = w.clouds
return (
f"In {place}, the weather for {time_str} is as follows:\n"
f"Detailed status: {detailed_status}\n"
f"Wind speed: {wind['speed']} m/s, direction: {wind['deg']}°\n"
f"Humidity: {humidity}%\n"
"Temperature: \n"
f"{temp_str}\n"
f"Rain: {rain}\n"
f"Heat index: {heat_index!s}\n"
f"Cloud cover: {clouds}%"
)
def weather_at_location(self, location: str) -> List[Document]:
"""
Finds the current weather at a location.
Args:
place (str):
The place to find the weather at.
Should be a city name and country.
"""
from pyowm.commons.exceptions import NotFoundError
try:
observation = self._mgr.weather_at_place(location)
except NotFoundError:
return [Document(text=f"Unable to find weather at {location}.")]
w = observation.weather
temperature = w.temperature(self.temp_units)
temp_unit = "°C" if self.temp_units == "celsius" else "°F"
temp_str = self._format_temp(temperature, temp_unit)
weather_text = self._format_weather(location, temp_str, w)
return [Document(text=weather_text, metadata={"weather from": location})]
def forecast_tomorrow_at_location(self, location: str) -> List[Document]:
"""
Finds the weather forecast for tomorrow at a location.
Args:
location (str):
The location to find the weather tomorrow at.
Should be a city name and country.
"""
from pyowm.commons.exceptions import NotFoundError
from pyowm.utils import timestamps
try:
forecast = self._mgr.forecast_at_place(location, "3h")
except NotFoundError:
return [Document(text=f"Unable to find weather at {location}.")]
tomorrow = timestamps.tomorrow()
w = forecast.get_weather_at(tomorrow)
temperature = w.temperature(self.temp_units)
temp_unit = "°C" if self.temp_units == "celsius" else "°F"
temp_str = self._format_temp(temperature, temp_unit)
weather_text = self._format_weather(location, temp_str, w, "tomorrow")
return [
Document(
text=weather_text,
metadata={
"weather from": location,
"forecast for": tomorrow.strftime("%Y-%m-%d"),
},
)
]
|
