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https://github.com/jcrist/msgspec
A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML
https://github.com/jcrist/msgspec
deserialization json json-schema jsonschema messagepack msgpack openapi3 python schema serde serialization toml validation yaml
Last synced: 13 days ago
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A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML
- Host: GitHub
- URL: https://github.com/jcrist/msgspec
- Owner: jcrist
- License: bsd-3-clause
- Created: 2021-01-26T02:53:57.000Z (almost 4 years ago)
- Default Branch: main
- Last Pushed: 2024-05-28T21:01:03.000Z (6 months ago)
- Last Synced: 2024-05-29T11:52:30.635Z (6 months ago)
- Topics: deserialization, json, json-schema, jsonschema, messagepack, msgpack, openapi3, python, schema, serde, serialization, toml, validation, yaml
- Language: Python
- Homepage: https://jcristharif.com/msgspec/
- Size: 5.43 MB
- Stars: 1,934
- Watchers: 19
- Forks: 56
- Open Issues: 99
-
Metadata Files:
- Readme: README.md
- Contributing: .github/CONTRIBUTING.md
- License: LICENSE
- Code of conduct: .github/CODE_OF_CONDUCT.md
- Security: .github/SECURITY.md
Awesome Lists containing this project
README
`msgspec` is a *fast* serialization and validation library, with builtin
support for [JSON](https://json.org), [MessagePack](https://msgpack.org),
[YAML](https://yaml.org), and [TOML](https://toml.io). It features:
- 🚀 **High performance encoders/decoders** for common protocols. The JSON and
MessagePack implementations regularly
[benchmark](https://jcristharif.com/msgspec/benchmarks.html) as the fastest
options for Python.
- 🎉 **Support for a wide variety of Python types**. Additional types may be
supported through
[extensions](https://jcristharif.com/msgspec/extending.html).
- 🔍 **Zero-cost schema validation** using familiar Python type annotations. In
[benchmarks](https://jcristharif.com/msgspec/benchmarks.html) `msgspec`
decodes *and* validates JSON faster than
[orjson](https://github.com/ijl/orjson) can decode it alone.
- ✨ **A speedy Struct type** for representing structured data. If you already
use [dataclasses](https://docs.python.org/3/library/dataclasses.html) or
[attrs](https://www.attrs.org),
[structs](https://jcristharif.com/msgspec/structs.html) should feel familiar.
However, they're
[5-60x faster](https://jcristharif.com/msgspec/benchmarks.html#benchmark-structs>)
for common operations.
All of this is included in a
[lightweight library](https://jcristharif.com/msgspec/benchmarks.html#benchmark-library-size)
with no required dependencies.
---
`msgspec` may be used for serialization alone, as a faster JSON or
MessagePack library. For the greatest benefit though, we recommend using
`msgspec` to handle the full serialization & validation workflow:
**Define** your message schemas using standard Python type annotations.
```python
>>> import msgspec
>>> class User(msgspec.Struct):
... """A new type describing a User"""
... name: str
... groups: set[str] = set()
... email: str | None = None
```
**Encode** messages as JSON, or one of the many other supported protocols.
```python
>>> alice = User("alice", groups={"admin", "engineering"})
>>> alice
User(name='alice', groups={"admin", "engineering"}, email=None)
>>> msg = msgspec.json.encode(alice)
>>> msg
b'{"name":"alice","groups":["admin","engineering"],"email":null}'
```
**Decode** messages back into Python objects, with optional schema validation.
```python
>>> msgspec.json.decode(msg, type=User)
User(name='alice', groups={"admin", "engineering"}, email=None)
>>> msgspec.json.decode(b'{"name":"bob","groups":[123]}', type=User)
Traceback (most recent call last):
File "", line 1, in
msgspec.ValidationError: Expected `str`, got `int` - at `$.groups[0]`
```
`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,
encoding/decoding a message with `msgspec` can be
[~10-80x faster than alternative libraries](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/main/LICENSE).