[Tutor] About Python Module to Process Bytes

[Michelle Meiduo Wu]

Hi there,
I'd like to find some python module to easily process bytes array data, like encoding different types of data (char, long, short, float, etc) into a same bytes array. I checked Python built-in library and there are bytes and bytearray types which don't provide enough functions for processing bytes easily. 
Does anybody know if there is other convenient module available for processing bytes?
Thank you,Michelle