---
id: dill
version: "0.4.1"
license: BSD-3-Clause
license_treatment: permissive
maintenance: active
---

# dill — serialize all of Python

License: permissive · Maintenance: active · Popularity: top 1,000 on PyPI

## Install

pip install dill
uv add dill
poetry add dill

## Description

-----------------------------
dill: serialize all of Python
-----------------------------

About Dill
==========

``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.

``dill`` provides the user the same interface as the ``pickle`` module, and
also includes some additional features. In addition to pickling Python
objects, ``dill`` provides the ability to save the state of an interpreter
session in a single command.  Hence, it would be feasible to save an
interpreter session, close the interpreter, ship the pickled file to
another computer, open a new interpreter, unpickle the session and
thus continue from the 'saved' state of the original interpreter
session.

``dill`` can be used to store Python objects to a file, but the primary
usage is to send Python objects across the network as a byte stream.
``dill`` is quite flexible, and allows arbitrary user defined classes
and functions to be serialized.  Thus ``dill`` is not intended to...

## AI interpretation — verify before relying

dill extends Python's pickle module to serialize and deserialize a broader range of Python objects, including functions, lambdas, classes, and interpreter sessions, enabling object persistence and network transmission.

Verdict: dill is a mature, actively maintained serialization library with no known vulnerabilities, zero runtime dependencies, and permissive licensing. It is well-suited for projects needing to pickle functions, lambdas, and complex Python objects beyond pickle's standard scope.

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