Propietary binary serial port protocols

[jon vs. python]

Hi,
I'm working in several helper tools to parse, simulate, etc. propietary
binary serial port protocols. I'm trying to find out which is the best
internal data representation. Bytearrays seem to be the best choice, but I'd
like some feedback from more experienced developers; because I took a look
to scapy's source code and didn't see any of those...
Thanks, Jon.
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