1 # 主机字节序和网络字节序之间的相互转换 2  3 import socket 4  5  6 def convert_integer(): 7     data = http://www.mamicode.com/1234"color: #008080;"> 8     # 32-bit 9     print("Original: %s => Long host byte order: %s, Network byte order: %s"10           % (data, socket.ntohl(data), socket.htonl(data)))11     # 16-bit12     print("Original: %s => Short host byte order: %s, Network byte order: %s"13           % (data, socket.ntohs(data), socket.htons(data)))14 15 if __name__ == ‘__main__‘:16     convert_integer()

 1 def ntohl(integer):  # real signature unknown; restored from __doc__ 2     """ 3     ntohl(integer) -> integer 4  5     Convert a 32-bit integer from network to host byte order. 6     """ 7     return 0 8   # 将网络字节顺序转换成主机字节顺序(32bit) 9 10 def ntohs(integer):  # real signature unknown; restored from __doc__11     """12     ntohs(integer) -> integer13 14     Convert a 16-bit integer from network to host byte order.15     """16     return 017   # 将网络字节顺序转换成主机字节顺序(16bit)18 19 def htonl(integer):  # real signature unknown; restored from __doc__20     """21     htonl(integer) -> integer22 23     Convert a 32-bit integer from host to network byte order.24     """25     return 026   # 将主机字节顺序转换成网络字节顺序(32bit)27 28 def htons(integer):  # real signature unknown; restored from __doc__29     """30     htons(integer) -> integer31 32     Convert a 16-bit integer from host to network byte order.33     """34     return 035   # 将主机字节顺序转换成网络字节顺序(16bit)

网络字节顺序NBO(Network Byte Order): 按从高到低的顺序存储，在网络上使用统一的网络字节顺序，可以避免兼容性问题。主机字节顺序(HBO，Host Byte Order): 不同的机器HBO不相同，与CPU设计有关，数据的顺序是由cpu决定的,而与操作系统无关。如 Intel x86结构下, short型数0x1234表示为34 12, int型数0x12345678表示为78 56 34 12如 IBM power PC结构下, short型数0x1234表示为12 34, int型数0x12345678表示为12 34 56 78