__author__ = '曾是土木人'
# -*- coding: utf-8 -*-
#采集SERP搜索结果标题
import urllib2
from bs4 import BeautifulSoup
import time
#写文件
def WriteFile(fileName,content):
    try:
        fp = file(fileName,"a+")
        fp.write(content + "\r")
        fp.close()
    except:
        pass

#获取Html源码
def GetHtml(url):
    try:
        req = urllib2.Request(url)
        response= urllib2.urlopen(req,None,3)#设置超时时间
        data    = response.read().decode('utf-8','ignore')
    except:pass
    return data

#提取搜索结果SERP的标题
def FetchTitle(html):
    try:
        soup = BeautifulSoup(''.join(html))
        for i in soup.findAll("h3"):
            title = i.text.encode("utf-8")　　　　　　
　　　　　　　if any(str_ in title for str_ in ("北京","厦门")):
　　　　　　　　  continue
            else:
                print title
            WriteFile("Result.txt",title)
    except:
        pass

keyword = "58同城"
if __name__ == "__main__":
    global keyword
    start = time.time()
    for i in range(0,8):
        url = "http://www.baidu.com/s?wd=intitle:"+keyword+"&rn=100&pn="+str(i*100)
        html = GetHtml(url)
        FetchTitle(html)
        time.sleep(1)
    c = time.time() - start
    print('程序运行耗时:%0.2f 秒'%(c))