python爬虫torrentkitty的种子

__author__ = 'JianqingJiang'
# -*- coding: utf-8 -*-
import urllib2
from lxml import etree
import os
pre_url ='http://www.torrentkitty.org/search/tokyohot/'
os.chdir('/Users/JianqingJiang/Downloads/')

def steve(page_num,file_name):
url = pre_url + str(page_num)
print url
ht = urllib2.urlopen(url).read()
content = etree.HTML(ht.lower().decode('utf-8'))
mags = content.xpath("//a[@rel='magnet']")
with open(file_name,'a') as p: # '''Note'''：Ａppend mode, run only once!
for mag in mags:
p.write("%s \n \n"%(mag.attrib['href'])+"\n") ##!!encode here to utf-8 to avoid encoding
print "%s \n \n"%(mag.attrib['href'])

for page_num in range(0,10):
print (page_num)
steve(page_num, 'steve.txt')