爬取学习bs4

今天学习了爬取的bs4：

爬取了北京新发地的菜价信息：

代码

import requests
from bs4 import BeautifulSoup
import csv
url = "http://www.xinfadi.com.cn/marketanalysis/0/list/1.shtml"
resp = requests.get(url)
#print(resp.text)
f = open("菜价.csv",mode = "w",encoding = "utf-8")
csvwriter = csv.writer(f)
page = BeautifulSoup(resp.text,"html.parser")
table = page.find("table",class_="hq_table")
#print(table)
trs = table.find_all("tr")[1:]
for tr in trs:
    tds = tr.find_all("td")
    name = tds[0].text
    low = tds[1].text
    avg = tds[2].text
    high = tds[3].text
    gui = tds[4].text
    kind = tds[5].text
    date = tds[6].text
    csvwriter.writerow([name,low,avg,high,gui,kind,date])
print("over")
f.close()
resp.close()