写一段爬取天气的python代码

可以使用第三方库 requests 和 BeautifulSoup 来爬取天气信息。代码如下：

import requests
from bs4 import BeautifulSoup

def get_weather(city_name):
    # 请求 URL
    url = f'https://www.google.com/search?q={city_name}天气'
    headers = {
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/58.0.3029.110 Safari/537.3'}
    # 发送请求，获取网页数据
    response = requests.get(url, headers=headers)
    response.raise_for_status()
    # 解析网页数据
    soup = BeautifulSoup(response.text, 'lxml')
    weather_info = soup.select_one('#wob_tm').text
    weather = soup.select_one('#wob_dc').text
    return weather_info, weather

city_name = '北京'
weather_info, weather = get_weather(city_name)
print(f'{city_name}的天气：{weather_info} {weather}')

这段代码实现了通过爬取 Google 搜索的天气结果来获取天气信息。