msgspec

|github| |pypi|

msgspec is a fast and friendly implementation of the MessagePack <https://msgpack.org>__ (msgpack) protocol for Python 3.8+. In addition to
serialization/deserialization, it supports message validation using schemas
defined via Python's type annotations <https://docs.python.org/3/library/typing.html>__.

.. code-block:: python

from typing import Optional, List
import msgspec

# Define a schema for a `User` type
class User(msgspec.Struct):
    name: str
    groups: List[str] = []
    email: Optional[str] = None

# Create a `User` object
alice = User("alice", groups=["admin", "engineering"])

# Serialize `alice` to `bytes` using the MessagePack protocol
serialized_data = msgspec.encode(alice)

# Deserialize and validate the message as a User type
user = msgspec.decode(serialized_data, type=User)

assert user == alice

msgspec is designed to be as performant as possible, while retaining some
of the nicities of validation libraries like pydantic <https://pydantic-docs.helpmanual.io/>__. For supported types, serializing a
message with msgspec can be ~2-4x faster than alternative libraries.

.. image:: https://github.com/jcrist/msgspec/raw/master/docs/source/_static/bench-1.png
:target: https://jcristharif.com/msgspec/benchmarks.html

See the documentation <https://jcristharif.com/msgspec/>__ for more
information.

LICENSE

New BSD. See the
License File <https://github.com/jcrist/msgspec/blob/master/LICENSE>_.

.. |github| image:: https://github.com/jcrist/msgspec/actions/workflows/ci.yml/badge.svg
:target: https://github.com/jcrist/msgspec/actions/workflows/ci.yml
.. |pypi| image:: https://img.shields.io/pypi/v/msgspec.svg
:target: https://pypi.org/project/msgspec/