python 爬虫 表格,python爬虫爬取网页表格数据

用python爬取网页表格数据，供大家参考，具体内容如下

from bs4 import BeautifulSoup

import requests

import csv

import bs4

#检查url地址

def check_link(url):

try:

r = requests.get(url)

r.raise_for_status()

r.encoding = r.apparent_encoding

return r.text

except:

print('无法链接服务器！！！')

#爬取资源

def get_contents(ulist,rurl):

soup = BeautifulSoup(rurl,'lxml')

trs = soup.find_all('tr')

for tr in trs:

ui = []

for td in tr:

ui.append(td.string)

ulist.append(ui)

#保存资源

def save_contents(urlist):

with open("D:/2016年中国企业500强排行榜.csv",'w') as f:

writer = csv.writer(f)

writer.writerow(['2016年中国企业500强排行榜'])

for i in range(len(urlist)):

writer.writerow([urlist[i][1],urlist[i][3],urlist[i][5]])

def main():

urli = []

url = "http://www.maigoo.com/news/463071.html"

rs = check_link(url)

get_contents(urli,rs)

save_contents(urli)

main()

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