chinanet.py 文件源码

def is_in_china(self, str_ip):
        '''binary search'''
        try:
            ip = struct.unpack('>I', socket.inet_aton(str_ip))[0]
        except socket.error:
            return False
        i = 0
        j = len(self.china_subs) - 1
        while (i <= j):
            k = (i + j) // 2
            if ip > self.china_subs[k][1]:
                i = k + 1
            elif ip < self.china_subs[k][0]:
                j = k - 1
            else:
                return True
        return False