注意：由于网站升级等原因，各关卡的访问链接会有所变化，请注意修改代码中的url变量。
# coding=utf-8
import requests
from lxml import etree
url = 'http://www.spiderbuf.cn/s01'
html = requests.get(url).text
f = open('01.html', 'w', encoding='utf-8')
f.write(html)
f.close()
root = etree.HTML(html)
trs = root.xpath('//tr')
f = open('data01.txt', 'w', encoding='utf-8')
for tr in trs:
tds = tr.xpath('./td')
s = ''
for td in tds:
# print(td.text)
s = s + str(td.text) + '|'
print(s)
if s != '':
f.write(s + '\n')
f.close()
# print(html)