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How does multiprocessing share data between processes?

Q: How does multiprocessing share data between processes?

Unlike threads, processes have **separate memory** — they can't see each other's objects. So `multiprocessing` moves data **explicitly**, and the default mechanism is **pickling**: an object is serialized to bytes, sent over a pipe/queue, and reconstructed on the other side. Process A obj → pickle pipe / queue <rect class='d-box' x='370' y='50' width='120' height='60

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Pickling, IPC, shared memory.

multiprocessingipc

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PYPickling is the IPC mechanism (round-trip)

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