marshal
marshal — Internal Python object serialization
This module contains functions that can read and write Python values in a binary format. The format is specific to Python, but independent of machine architecture issues (e.g., you can write a Python value to a file on a PC, transport the file to a Sun, and read it back there). Details of the format are undocumented on purpose; it may change between Python versions (although it rarely does). [1]
This is not a general “persistence” module. For general persistence and transfer of Python objects through RPC calls, see the modules pickle
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