pocketpy/docs/modules/pickle.md
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---
icon: package
label: pickle
---
### `pickle.dumps(obj) -> bytes`
Return the pickled representation of an object as a bytes object.
### `pickle.loads(b: bytes)`
Return the unpickled object from a bytes object.
## What can be pickled and unpickled?
The following types can be pickled:
- [x] None, True, and False;
- [x] integers, floating-point numbers;
- [x] strings, bytes;
- [x] tuples, lists, sets, and dictionaries containing only picklable objects;
- [ ] functions (built-in and user-defined) accessible from the top level of a module (using def, not lambda);
- [ ] classes accessible from the top level of a module;
- [x] instances of such classes