使用python脚本获得网站的google pr值和alexa排名，pythonpr,下面代码在网上摘录，原作

使用python脚本获得网站的google pr值和alexa排名，pythonpr,下面代码在网上摘录，原作

下面代码在网上摘录，原作者不详，经过我的测试可以正确的获得网站的google pr和alexa排名。

import structimport sysimport urllib2import httplibimport reimport xml.etree.ElementTreeclass RankProvider(object):    """Abstract class for obtaining the page rank (popularity)    from a provider such as Google or Alexa.    """    def __init__(self, host, proxy=None, timeout=30):        """Keyword arguments:        host -- toolbar host address        proxy -- address of proxy server. Default: None        timeout -- how long to wait for a response from the server.        Default: 30 (seconds)        """        self._opener = urllib2.build_opener()        if proxy:            self._opener.add_handler(urllib2.ProxyHandler({"http": proxy}))        self._host = host        self._timeout = timeout    def get_rank(self, url):        """Get the page rank for the specified URL        Keyword arguments:        url -- get page rank for url        """        raise NotImplementedError("You must override get_rank()")class AlexaTrafficRank(RankProvider):    """ Get the Alexa Traffic Rank for a URL    """    def __init__(self, host="xml.alexa.com", proxy=None, timeout=30):        """Keyword arguments:        host -- toolbar host address: Default: joolbarqueries.google.com        proxy -- address of proxy server (if required). Default: None        timeout -- how long to wait for a response from the server.        Default: 30 (seconds)        """        super(AlexaTrafficRank, self).__init__(host, proxy, timeout)    def get_rank(self, url):        """Get the page rank for the specified URL        Keyword arguments:        url -- get page rank for url        """        query = "http://%s/data?cli=10&dat=nsa&ver=quirk-searchstatus&uid=\20120730094100&userip=192.168.0.1&url=%s" % (self._host, urllib2.quote(url, safe=''))        response = self._opener.open(query, timeout=self._timeout)        if response.getcode() == httplib.OK:            data = response.read()            element = xml.etree.ElementTree.fromstring(data)            for e in element.iterfind("SD"):                popularity = e.find("POPULARITY")                if popularity is not None:                    return int(popularity.get("TEXT"))class GooglePageRank(RankProvider):    """ Get the google page rank figure using the toolbar API.    Credits to the author of the WWW::Google::PageRank CPAN package    as I ported that code to Python.    """    def __init__(self, host="toolbarqueries.google.com", proxy=None, timeout=30):        """Keyword arguments:        host -- toolbar host address: Default: toolbarqueries.google.com        proxy -- address of proxy server (if required). Default: None        timeout -- how long to wait for a response from the server.        Default: 30 (seconds)        """        super(GooglePageRank, self).__init__(host, proxy, timeout)        self._opener.addheaders = [("User-agent", "Mozilla/4.0 (compatible; \GoogleToolbar 2.0.111-big; Windows XP 5.1)")]    def get_rank(self, url):        # calculate the hash which is required as part of the get        # request sent to the toolbarqueries url.        ch = '6' + str(self._compute_ch_new("info:%s" % (url)))        query = ("http://%s/tbr?client=navclient-auto&ch=%s&ie=UTF-8&oe=UTF-8&\features=Rank&q=info:%s" % (self._host, ch, urllib2.quote(url, safe='')))        response = self._opener.open(query, timeout=self._timeout)        if response.getcode() == httplib.OK:            data = response.read()            match = re.match("Rank_\d+:\d+:(\d+)", data)            if match:                rank = match.group(1)                return int(rank)    @classmethod    def _compute_ch_new(cls, url):        ch = cls._compute_ch(url)        ch = ((ch % 0x0d) & 7) | ((ch / 7) << 2);        return cls._compute_ch(struct.pack("<20L", *(cls._wsub(ch, i * 9) for i in range(20))))    @classmethod    def _compute_ch(cls, url):        url = struct.unpack("%dB" % (len(url)), url)        a = 0x9e3779b9        b = 0x9e3779b9        c = 0xe6359a60        k = 0        length = len(url)        while length >= 12:            a = cls._wadd(a, url[k+0] | (url[k+1] << 8) | (url[k+2] << 16) | (url[k+3] << 24));            b = cls._wadd(b, url[k+4] | (url[k+5] << 8) | (url[k+6] << 16) | (url[k+7] << 24));            c = cls._wadd(c, url[k+8] | (url[k+9] << 8) | (url[k+10] << 16) | (url[k+11] << 24));            a, b, c = cls._mix(a, b, c)            k += 12            length -= 12        c = cls._wadd(c, len(url));        if length > 10: c = cls._wadd(c, url[k+10] << 24)        if length > 9: c = cls._wadd(c, url[k+9] << 16)        if length > 8: c = cls._wadd(c, url[k+8] << 8)        if length > 7: b = cls._wadd(b, url[k+7] << 24)        if length > 6: b = cls._wadd(b, url[k+6] << 16)        if length > 5: b = cls._wadd(b, url[k+5] << 8)        if length > 4: b = cls._wadd(b, url[k+4])        if length > 3: a = cls._wadd(a, url[k+3] << 24)        if length > 2: a = cls._wadd(a, url[k+2] << 16)        if length > 1: a = cls._wadd(a, url[k+1] << 8)        if length > 0: a = cls._wadd(a, url[k])        a, b, c = cls._mix(a, b, c);        # integer is always positive        return c    @classmethod    def _mix(cls, a, b, c):        a = cls._wsub(a, b); a = cls._wsub(a, c); a ^= c >> 13;        b = cls._wsub(b, c); b = cls._wsub(b, a); b ^= (a << 8) % 4294967296;        c = cls._wsub(c, a); c = cls._wsub(c, b); c ^= b >>13;        a = cls._wsub(a, b); a = cls._wsub(a, c); a ^= c >> 12;        b = cls._wsub(b, c); b = cls._wsub(b, a); b ^= (a << 16) % 4294967296;        c = cls._wsub(c, a); c = cls._wsub(c, b); c ^= b >> 5;        a = cls._wsub(a, b); a = cls._wsub(a, c); a ^= c >> 3;        b = cls._wsub(b, c); b = cls._wsub(b, a); b ^= (a << 10) % 4294967296;        c = cls._wsub(c, a); c = cls._wsub(c, b); c ^= b >> 15;        return a, b, c    @staticmethod    def _wadd(a, b):        return (a + b) % 4294967296    @staticmethod    def _wsub(a, b):        return (a - b) % 4294967296if __name__ == "__main__":    url = "http://byrx.net/"    providers = (AlexaTrafficRank(), GooglePageRank(),)    print("Traffic stats for: %s" % (url))    for p in providers:        print("%s:%d" % (p.__class__.__name__, p.get_rank(url)))

感谢原作者，enjoy it.