OpenWeatherMap

本 Notebook 介绍了如何使用 OpenWeatherMap 组件来获取天气信息。

首先，你需要注册一个 OpenWeatherMap API 密钥

1. 前往 OpenWeatherMap 注册一个 API 密钥，点击此处
2. pip install pyowm

然后我们需要设置一些环境变量

1. 将你的 API 密钥保存到 OPENWEATHERMAP_API_KEY 环境变量中

使用包装器

%pip install --upgrade --quiet pyowm

Note: you may need to restart the kernel to use updated packages.

import os

from langchain_community.utilities import OpenWeatherMapAPIWrapper

os.environ["OPENWEATHERMAP_API_KEY"] = ""

weather = OpenWeatherMapAPIWrapper()

API 参考：OpenWeatherMapAPIWrapper

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

In London,GB, the current weather is as follows:
Detailed status: overcast clouds
Wind speed: 4.12 m/s, direction: 10°
Humidity: 51%
Temperature: 
  - Current: 12.82°C
  - High: 13.98°C
  - Low: 12.01°C
  - Feels like: 11.49°C
Rain: {}
Heat index: None
Cloud cover: 100%

使用工具

import os

from langgraph.prebuilt import create_react_agent

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

tools = [weather.run]
agent = create_react_agent("openai:gpt-4.1-mini", tools)

API 参考：create_react_agent

input_message = {
    "role": "user",
    "content": "What's the weather like in London?",
}

for step in agent.stream(
    {"messages": [input_message]},
    stream_mode="values",
):
    step["messages"][-1].pretty_print()

================================ Human Message =================================

What's the weather like in London?
================================== Ai Message ==================================
Tool Calls:
  run (call_6vPq9neyy7oOnht29ExidE2g)
 Call ID: call_6vPq9neyy7oOnht29ExidE2g
  Args:
    location: London
================================= Tool Message =================================
Name: run

In London, the current weather is as follows:
Detailed status: overcast clouds
Wind speed: 4.12 m/s, direction: 10°
Humidity: 51%
Temperature: 
  - Current: 12.82°C
  - High: 13.98°C
  - Low: 12.01°C
  - Feels like: 11.49°C
Rain: {}
Heat index: None
Cloud cover: 100%
================================== Ai Message ==================================

The weather in London is currently overcast with 100% cloud cover. The temperature is around 12.82°C, feeling like 11.49°C. The wind is blowing at 4.12 m/s from the direction of 10°. Humidity is at 51%. The high for the day is 13.98°C, and the low is 12.01°C.

相关

• 工具概念指南
• 工具操作指南