Python爬取表格的步骤：
1、检查url地址，用raise_for_status()检查url地址；
2、爬取资源，用BeautifulSoup()爬取数据，并且用find_all('tr')抓取其中的表格；
3、保存资源，用write()将表格保存到指定目录。
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()运行结果：
