我希望这不会太复杂。我有一个256位十六进制整数编码为大端序,需要转换为小端序。Python的struct模块通常可以胜任,但是官方文档中没有列出与我所需格式接近的大小。
使用struct的非长度特定类型(尽管我可能做错了)似乎不起作用:
>> x = 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000'
>> y = struct.unpack('>64s', x)[0] # Unpacking as big-endian
>> z = struct.pack('<64s', y) # Repacking as little-endian
>> print z
'ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000'
示例代码(所需结果):
>> x = 'ffffffffffffffffffffffffffffffffffffffffffffffffffffffff00000000'
>> y = endianSwap(x)
>> print y
'00000000ffffffffffffffffffffffffffffffffffffffffffffffffffffffff'