Overview

msgspec 0.4, released on February 8, 2022, adds a dedicated JSON module and reorganizes the package architecture.

Main Features

JSON module

The new msgspec.json module provides a fast JSON encoder/decoder with built-in type validation.

python 
import msgspec

class User(msgspec.Struct):
    name: str
    age: int

# Typed JSON encoding/decoding
data = msgspec.json.encode(User('Alice', 30))
print(data)  # b'{"name":"Alice","age":30}'

user = msgspec.json.decode(data, type=User)
print(user)  # User(name='Alice', age=30)

Reorganization

The package is reorganized with dedicated sub-modules: msgspec.json, msgspec.msgpack.

python 
import msgspec

# JSON
msgspec.json.encode({'key': 'value'})

# MessagePack
msgspec.msgpack.encode({'key': 'value'})

Sources