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

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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.

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

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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.

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

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