python reverse byteorder from network service

I get the following bytes from a network service: \x83\x08\x04\x04\x60\x02\x00\x81\x15\x01\x01 These are 8 bit number. I want to change the represent开发者_JAVA百科ation to my system's representation (32 bits) to be able to work on the bytes. How would I do this with python? Is there a special 'reverse' function for this?

best regards

If you have 8-bit numbers the byte order is irrelevant, as there is only one byte in each of them. If you want to convert every character to integer you can write:

struct.unpack("11B", "\x83\x08\x04\x04\x60\x02\x00\x81\x15\x01\x01")

or

struct.unpack("!11B", "\x83\x08\x04\x04\x60\x02\x00\x81\x15\x01\x01")

or

map(ord, "\x83\x08\x04\x04\x60\x02\x00\x81\x15\x01\x01")

It's equivalent. If string contains 16-bit or 32-bit integers, you can write things like:

struct.unpack("!IIHB", "\x83\x08\x04\x04\x60\x02\x00\x81\x15\x01\x01")

which would be decoded as two 4-byte, one 2-byte and one 1-byte unsigned integers. The ! (which is equivalent to big-endian >) means that string is in network byte order, so all integers larger than one byte can be converted correctly to your native byte order.

EDIT: If what you want is to get eleven numbers and process them in reversed order, you should use one of above methods and call reversed, for example: reversed(map(ord, data)); but this reverses the order regardless of your native byte order. You didn't say what the data really is thou and I'm not convinced endianness does matter here.

Determine which byte order the bytes are in, and supply the correct byte order character to struct.unpack.

If you want to reverse all of the bytes in a string, you can do this:

'example string'[::-1]

I would recommend the struct module for unpacking network or otherwise binary data, as you otherwise don't have a good way to tell where exactly the reversing needs to happen. It allows you to specify the byte order.

I'm not sure what you mean by 8308040460020081150101, but the struct package should have everything you need.

Have you looked at the core struct library? It has methods for converting byte orders.