What would be an inter-process communication (IPC) framework\technique with the following requirements:
- Transfer native Python objects between two Python processes
- Efficient in time and CPU (RAM efficiency irrelevant)
- Cross-platform Win\Linux
- Nice to have: works with PyPy
UPDATE 1: the processes are on the same host and use the same versions of Python and other modules
UPDATE 2: the processes are run independently by the user, no one of them spawns the others