dill extends Python’s pickle module for serializing and de-serializing Python objects to the majority of the built-in Python types. Serialization is the process of converting an object to a byte stream, and the inverse of which is converting a byte stream back to a Python object hierarchy.

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dill can pickle the following standard types:

    none, type, bool, int, float, complex, bytes, str,
    tuple, list, dict, file, buffer, builtin,
    Python classes, namedtuples, dataclasses, metaclasses,
    instances of classes,
    set, frozenset, array, functions, exceptions

dill can also pickle more ‘exotic’ standard types:

    functions with yields, nested functions, lambdas,
    cell, method, unboundmethod, module, code, methodwrapper,
    methoddescriptor, getsetdescriptor, memberdescriptor, wrapperdescriptor,
    dictproxy, slice, notimplemented, ellipsis, quit