socket.ntohl(x)     // 类似于C语言的ntohl(x)

socket.ntohs(x)    // 类似于C语言的ntohs(x)

socket.htonl(x)     // 类似于C语言的htonl(x)

socket.htons(x)    // 类似于C语言的htons(x)

socket.inet_aton(ip_string) // 依赖于inet_aton的C实现

socket.inet_ntoa(packed_ip)

socket.inet_pton(address_family,ip_string)

socket.inet_ntop(address_family,packed_ip)

>import socket
>import struct
>socket.ntohl(struct.unpack("i",socket.inet_aton("10.10.58.64"))[0])
168442432L
>socket.inet_ntoa(struct.pack("i", socket.htonl(168442432L)))
'10.10.58.64'
>struct.unpack("=I", socket.inet_aton("190.10.58.64"))
(1077545662,)
>socket.inet_ntoa(struct.pack("=I", 1077545662))
'190.10.58.64'
# 从IP地址字符串转换为整数值

defIp2Int(ip_string):
     return struct.unpack(“!I”,socket.inet_aton(ip))[0
# 从网络字节序的数字转换为IP地址（点号分隔）

def Int2Ip(ip):
     return socket.inet_ntoa(struct.pack(“!I”,ip))

> ip2num = lambda x:sum([256**j*int(i) for j,i in enumerate(x.split('.')[::-1])])
> ip2num('192.168.0.1')
3232235521

> [256**j*int(i) for j,i in enumerate(x.split('.')[::-1])]
[1, 0, 11010048, 3221225472]
> for j,i in enumerate(x.split('.')[::-1]):
...   print j,i
...
0 1
1 0
2 168
3 192

> num2ip = lambda x: '.'.join([str(x/(256**i)%256) for i in range(3,-1,-1)])
> num2ip(3232235521)
'192.168.0.1