python ip地址转换 

import socket, struct
def ip2long(ip):  
    return struct.unpack("!L",socket.inet_aton(ip))[0]  
def long2ip(longip):  
    return socket.inet_ntoa(struct.pack('!L', longip))  
if __name__ == '__main__':  
    print('local ip address to long is %s'%ip2long('8.8.8.8'))  
    print('local ip address long to ip is %s'%long2ip(3756947712))  
    print('local ip address long to ip is %s'%long2ip(3756947967))