langchain/docs/modules/agents/tools/examples/openweathermap.ipynb

OpenWeatherMap API

This notebook goes over how to use the OpenWeatherMap component to fetch weather information.

First, you need to sign up for an OpenWeatherMap API key:

1. Go to OpenWeatherMap and sign up for an API key here
2. pip install pyowm

Then we will need to set some environment variables:

1. Save your API KEY into OPENWEATHERMAP_API_KEY env variable

Use the wrapper

In [9]:

from langchain.utilities import OpenWeatherMapAPIWrapper
import os

os.environ["OPENWEATHERMAP_API_KEY"] = ""

weather = OpenWeatherMapAPIWrapper()

In [10]:

weather_data = weather.run("London,GB")
print(weather_data)

In London,GB, the current weather is as follows:
Detailed status: broken clouds
Wind speed: 2.57 m/s, direction: 240°
Humidity: 55%
Temperature: 
  - Current: 20.12°C
  - High: 21.75°C
  - Low: 18.68°C
  - Feels like: 19.62°C
Rain: {}
Heat index: None
Cloud cover: 75%

Use the tool

In [11]:

from langchain.llms import OpenAI
from langchain.agents import load_tools, initialize_agent, AgentType
import os

os.environ["OPENAI_API_KEY"] = ""
os.environ["OPENWEATHERMAP_API_KEY"] = ""

llm = OpenAI(temperature=0)

tools = load_tools(["openweathermap-api"], llm)

agent_chain = initialize_agent(
    tools=tools,
    llm=llm,
    agent=AgentType.ZERO_SHOT_REACT_DESCRIPTION,
    verbose=True
)

In [12]:

agent_chain.run("What's the weather like in London?")

Out [12]:

> Entering new AgentExecutor chain...
 I need to find out the current weather in London.
Action: OpenWeatherMap
Action Input: London,GB
Observation: In London,GB, the current weather is as follows:
Detailed status: broken clouds
Wind speed: 2.57 m/s, direction: 240°
Humidity: 56%
Temperature: 
  - Current: 20.11°C
  - High: 21.75°C
  - Low: 18.68°C
  - Feels like: 19.64°C
Rain: {}
Heat index: None
Cloud cover: 75%
Thought: I now know the current weather in London.
Final Answer: The current weather in London is broken clouds, with a wind speed of 2.57 m/s, direction 240°, humidity of 56%, temperature of 20.11°C, high of 21.75°C, low of 18.68°C, and a heat index of None.

> Finished chain.

'The current weather in London is broken clouds, with a wind speed of 2.57 m/s, direction 240°, humidity of 56%, temperature of 20.11°C, high of 21.75°C, low of 18.68°C, and a heat index of None.'