就是一个简单的python查询百度关键词排名的函数，以下是一些简介：
1、UA随机
2、操作简单方便，直接getRank(关键词，域名)就可以了
3、编码转化。编码方面应该没啥问题了。
4、结果丰富。不仅有排名，还有搜索结果的title，URL，快照时间，符合SEO需求
5、拿来做个软件或者自己用都很方便。

功能是单线程实现，速度慢，大家可以参考修改成自己需要的。

复制代码 代码如下:
#coding=utf-8

import requests
import BeautifulSoup
import re
import random

def decodeAnyWord(w):
    try:
        w.decode(\’utf-8\’)
    except:
        w = w.decode(\’gb2312\’)
    else:
        w = w.decode(\’utf-8\’)
    return w

def createURL(checkWord):   #create baidu URL with search words
    checkWord = checkWord.strip()
    checkWord = checkWord.replace(\’ \’, \’+\’).replace(\’\\n\’, \’\’)
    baiduURL = \’http://www.baidu.com/s?wd=%s&rn=100\’ % checkWord
    return baiduURL

def getContent(baiduURL):   #get the content of the serp
    uaList = [\’Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+1.1.4322;+TencentTraveler)\’,
    \’Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1;+.NET+CLR+2.0.50727;+.NET+CLR+3.0.4506.2152;+.NET+CLR+3.5.30729)\’,
    \’Mozilla/5.0+(Windows+NT+5.1)+AppleWebKit/537.1+(KHTML,+like+Gecko)+Chrome/21.0.1180.89+Safari/537.1\’,
    \’Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1)\’,
    \’Mozilla/5.0+(Windows+NT+6.1;+rv:11.0)+Gecko/20100101+Firefox/11.0\’,
    \’Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0;+SV1)\’,
    \’Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0;+GTB7.1;+.NET+CLR+2.0.50727)\’,
    \’Mozilla/4.0+(compatible;+MSIE+8.0;+Windows+NT+5.1;+Trident/4.0;+KB974489)\’]
    headers = {\’User-Agent\’: random.choice(uaList)}

    r = requests.get(baiduURL, headers = headers)
    return r.content

def getLastURL(rawurl): #get final URL while there\’re redirects
    r = requests.get(rawurl)
    return r.url

def getAtext(atext):    #get the text with and
    pat = re.compile(r\'(.*?)\’)
    match = pat.findall(atext.replace(\’\\n\’, \’\’))
    pureText = match[0].replace(\'\’, \’\’).replace(\'\’, \’\’)
    return pureText.replace(\’\\n\’, \’\’)

def getCacheDate(t):    #get the date of cache
    pat = re.compile(r\'.*?(\\d{4}-\\d{1,2}-\\d{1,2}) \’)
    match = pat.findall(t)
    cacheDate = match[0]
    return cacheDate

def getRank(checkWord, domain): #main line
    checkWord = checkWord.replace(\’\\n\’, \’\’)
    checkWord = decodeAnyWord(checkWord)
    baiduURL = createURL(checkWord)
    cont = getContent(baiduURL)
    soup = BeautifulSoup.BeautifulSoup(cont)
    results = soup.findAll(\’table\’, {\’class\’: \’result\’})    #find all results in this page

    for result in results:
        checkData = unicode(result.find(\’span\’, {\’class\’: \’g\’}))
        if re.compile(r\’^[^/]*%s.*?\’ %domain).match(checkData.replace(\'\’, \’\’).replace(\'\’, \’\’)): #改正则
            nowRank = result[\’id\’]  #get the rank if match the domain info

            resLink = result.find(\’h3\’).a
            resURL = resLink[\’href\’]
            domainURL = getLastURL(resURL)  #get the target URL
            resTitle = getAtext(unicode(resLink))   #get the title of the target page

            rescache = result.find(\’span\’, {\’class\’: \’g\’})
            cacheDate = getCacheDate(unicode(rescache)) #get the cache date of the target page

            res = u\’%s, 第%s名, %s, %s, %s\’ % (checkWord, nowRank, resTitle, cacheDate, domainURL)
            return res.encode(\’gb2312\’)
            break
    else:
        return \’>100\’

domain = \’www.baidu.com\’ #set the domain which you want to search.
print getRank(\’百度\’, domain)