一个简单的python查询百度关键词排名的函数，特点：
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
缺点：
单线程，速度慢
#coding=utf-8 import requestsimport BeautifulSoupimport reimport 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)} ipList = ['202.43.188.13:8080', '80.243.185.168:1177', '218.108.85.59:81'] proxies = {'http': 'http://%s' % random.choice(ipList)} r = requests.get(baiduURL, headers = headers, proxies = proxies) 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 <a> and </a> pat = re.compile(r'<a .*?>(.*?)</a>') match = pat.findall(atext) pureText = match[0].replace('<em>', '').replace('</em>', '') return pureText def getCacheDate(t): #get the date of cache pat = re.compile(r'<span class="g">.*?(d{4}-d{1,2}-d{1,2}) </span>') 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): #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.douban.com' #set the domain which you want to search. f = open('r.txt')for w in f.readlines(): print getRank(w, domain) f.close()