使用Python的urllib库和BeautifulSoup库爬取长春天气预报数据的代码

以下是使用Python的urllib库和BeautifulSoup库爬取长春天气预报数据的代码：

import urllib.request
from bs4 import BeautifulSoup

url = "http://www.weather.com.cn/weather/101060101.shtml"
response = urllib.request.urlopen(url)
html = response.read()

soup = BeautifulSoup(html, 'html.parser')
weather_div = soup.find('div', {'id': '7d'})

ul = weather_div.find('ul')
li = ul.find_all('li')

for day in li:
    date = day.find('h1').string
    weather = day.find_all('p')
    temperature_high = weather[0].find('span').string
    temperature_low = weather[1].find('span').string
    print(date, temperature_high, temperature_low)

在运行代码之前，需要先安装BeautifulSoup库：

pip install beautifulsoup4