Function pickle 

pub fn pickle(
    py: Python<'_>,
    obj: Py<PyAny>,
    allow_pending_pickles: bool,
    allow_tensor_engine_references: bool,
) -> PyResult<PicklingState>

Pickle an object with support for pending pickles and tensor engine references.

This function creates a PicklingState and calls cloudpickle.dumps with an active thread-local PicklingState, allowing reduce implementations to push tensor engine references and pending pickles.

Arguments

• obj - The Python object to pickle
• allow_pending_pickles - If true, allow PyShared values to be registered as pending
• allow_tensor_engine_references - If true, allow tensor engine references to be registered

Returns

A PicklingState containing the pickled buffer and any registered references/pending pickles