0x00 获取某地七天天气预报
打开中国天气网，随便查询当地天气，查看返回页面的源码
发现我们需要的信息都在<ul>标签下的<li>标签中，所以这里的基本思路就是遍历<ul>标签下的<li>，每次获取日期，天气，温度三个数据，
首先定义四个函数来实现全部功能。第一个函数获取网页信息，第二个函数将信息提取存入列表，第三个函数打印这些数据，最后是一个main函数
import requests from bs4 import BeautifulSoup def getTHMLText(url): #获取网页 try: header={"User-Agent":"Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:64.0) Gecko/20100101 Firefox/64.0"} r = requests.get(url, headers = header) r.raise_for_status() r.encoding = r.apparent_encoding return r.text except: return '' def weather_info(html, lilist): soup = BeautifulSoup(html, "html.parser") li = soup.select("ul[class='t clearfix'] li") for i in li: #遍历li标签，并将数据存入列表 try: date = i.select("h1")[0].text wea = i.select("p[class='wea']")[0].text temp = i.select('p[class="tem"] span')[0].text + "/" + i.select('p[class="tem"] i')[0].text lilist.append([date, wea, temp]) except: return "" def printList(ulist, num): #打印列表 tplt = "{0:^10}\t{1:{3}^10}\t{2:^10}" print(tplt.format("日期", "天气", "温度", chr(12288))) for i in range(num): u = ulist[i] print(tplt.format(u[0], u[1], u[2], chr(12288))) def main(): lilist = [] url = 'http://www.weather.com.cn/weather/101190501.shtml' html = getTHMLText(url) weather_info(html, lilist) printList(lilist, 7) main()
