python訪問純真IP資料庫

    項目中有這樣的需求，通過IP地址判斷用戶端是網通的還是電信的。從同事那拿了個純文字的IP純真資料庫，用Python寫了一個小程式，感覺挺好的。點擊這裡
查看例子。

源碼下載

#!/usr/bin/env python# -*- coding: utf-8 -*-from bisect import bisect_LIST1, _LIST2 = [], []_INIT = Falseip2int = lambda ip_str: reduce(lambda a, b: (a << 8) + b, [int(i) for i in ip_str.split('.')])def _init():    global _LIST, _INIT    if not _INIT:        for l in open('ipdata.txt', 'rb'):            ip1, ip2 = l.split()[:2]            addr = ' '.join(l.split()[2:])            ip1, ip2 = ip2int(ip1), ip2int(ip2)            _LIST1.append(ip1)            _LIST2.append((ip1, ip2, addr))        _INIT = True    def ip_from(ip):    _init()    i = ip2int(ip)    idx = bisect(_LIST1, i)    assert(idx > 0)    if len(_LIST1) <= idx:        return u'unknown ip address %s' % ip    else:        frm, to ,addr = _LIST2[idx - 1]        if frm <= i <= to:            return addr        else:            return u'unknown ip address %s' % ip    if __name__ == '__main__':    print ip_from('115.238.54.106')    print ip_from('220.181.29.160')    print ip_from('115.238.54.107')    print ip_from('8.8.8.8')