Python使用bs4获取58同城城市分类的方法

# -*- coding:utf-8 -*-#! /usr/bin/pythonimport urllibimport os, datetime, sysfrom bs4 import BeautifulSoupreload(sys) sys.setdefaultencoding( "utf-8" ) __BASEURL__ = "http://bj.58.com/"__INITURL__ = "http://bj.58.com/hezu/"soup=BeautifulSoup(urllib.urlopen(__INITURL__))lv1Elements = soup.html.body.section.find('div', 'relative').find('dl', 'secitem')('a',href=True)f=open('data.txt', 'w')for element in lv1Elements[1:]:  f.write((element.get_text() + '/r/n'))  print element.get_text()  url = __BASEURL__ + element.get('href')  print url  soup=BeautifulSoup(urllib.urlopen(url))  lv2Elements = soup.html.body.section.find('div', 'relative').find('dl', 'secitem').find('div', 'subarea').find_all('a')  texts = [t.get_text() for t in lv2Elements]  f.write(' '.join(texts) + '/r/n/r/n')f.close()