Msgspec github. com/jcrist/msgspec/blob/main/benchmarks/bench_validation.

Msgspec github /froze More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects. In this case, it doesn't really matter how it is done, because the full pipeline is implemented in msgspec itself. EncodeError: Only enums with int or str values are supported when attempting to encode anything else. ArchLinux is one -> and our applications did stop working . 14. Currently, I can do this by setting omit_defaults to True, and adding a default of None to each field. Maybe that's impetus to re-examine #338 ? Putting this on the union instead (with an Annotated like pydantic, or by some other method, possibly even automatic?) could maybe open the door to allowing unions of TypedDicts May 26, 2023 · Description Is there an equivalent to from_builtins, but for objects? Or maybe msgspec. We could add shims everywhere that's needed to make msgspec PyPy compatible, but that would muddy up the code, increasing our maintenance burden. CVE-2025-27607 fix. Struct using msgspec. com/jcrist/msgspec; pydantic_core + orjson: https://github. Aug 21, 2023 · You however are using msgspec. encode / msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/setup. Since a few people have asked about how msgspec's performance compares to pydantic v2, I've updated the gist above with a benchmark that works with the current pydantic V2 betas. Naive datetime. Struct): result: msgspec. Structs are the repr, converter and validator functionalities of attrs. I wrote this up: mostly to get an understanding of how msgspec's performance compares with that: of pydantic V2. route_class = MsgSpecRoute Jul 10, 2024 · Msgspec's decision to have the tag field be a property of each struct instead might make this unreasonably difficult. py at main · jcrist/msgspec Aug 2, 2023 · Description for example import msgspec msgspec. decode ? I'd like to be able to encode/decode into regular Python objects, specifically SQLAlchemy. 13 its not any longer an option . msgpack import numpy as np import timeit class NumpySerializedRepresentation (msgspec. 0a3. 0, private = True) The former I find a bit easier to read, but it adds some complications: The type annotations would have to be parsed at struct definition time, same as they would for ClassVar . json. json import decode class Point(Struct, array_like=True): lng: float lat: float class Shape(Struct, A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/LICENSE at main · jcrist/msgspec Example Given a struct like: class Wrapper(msgspec. Jun 19, 2022 · I think supporting json schema would be critical for msgspec to be an alternative to Pydantic. msgspec. convert({'hash': b msgspec is a fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML. #820 opened Mar 3, 2025 by Vizonex Dec_hook callback for typed json decoding. convert(b'qq', type=str, strict=False) class S(msgspec. field (private = True) z: int = msgspec. Here's the scenario: from msgspec import Struct from msgspec. 1 Python 3. tar. Contribute to Barsug/msgspec-python313-pre development by creating an account on GitHub. c at main · jcrist/msgspec Mar 7, 2021 · As per original questions and discussion with `msgspec` author: - jcrist/msgspec#25 - jcrist/msgspec#140 this prototypes a new (but very naive) `msgspec. 13 until you support it. Struct definitions for use with the Ethereum Virtual Machine Msgspec Doesn't Decode Json Correctly when SQLAlchemy. Encoder () numpy_array_decoder = msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - jcrist/msgspec A collection of msgspec. . R Description Description Converting using msgspec. 13 (beta1). 13. Many parsers preallocate buffers during parsing for efficiency. frozen is True In a file: frozen. to avoid polluting the Struct method namespace, this should probably be a top-level method in the msgspec. encode(np. 0)) Traceback (most recent call las Aug 24, 2023 · Many of the builtin attrs validators are already supported in msgspec via other mechanisms, and will be both slower and duplicate work. Aug 21, 2023 · What's your reasoning for defining a msgspec. You switched accounts on another tab or window. Aug 25, 2022 · import msgspec. Struct, frozen=True): class Child(Base): assert Child. Struct instances implement several optimizations for reducing garbage collection (GC) pressure and decreasing memory usage. gz (216 kB) Installing build dependencies done Getting requirements to build wheel done Preparing metadata (py Aug 19, 2024 · Description When setting both omit_defaults and array_like to True, defaults are not omitted. fields API does not support generic types if the type is specified as seen below: from typing import Generic, TypeVar from msgspec import Struct from msgspec. This can cause the benchmarks to vary drastically between runs, even minutes apart. It features: 🚀 High performance encoders/decoders for common protocols. json as mjson import numpy as np mjson. com/samuelcolvin/pydantic-core/ (orjson is used for encoding only, since as far as I can tell pydantic_core does not (yet?) support JSON encoding natively) Mar 4, 2025 · On the python discord someone posted a benchmark comparing msgspec, orjson, pydantic, simdjson, This original benchmark shows msgspec decoding and validating JSON to be ~the same performance (or a bit slower) as orjson decoding it alone. 14 [msgspec (main Jul 25, 2023 · Actually, the attrs integration made me start using msgspec, because I find cattrs unnecessarily complicated and using msgspec to convert sqlalchemy. Something like msgspec. Structs from JSON Schema. Struct): hash: bytes content: str msgspec. The benchmark is modified from the one in the msgspec repo here: https://github. structs. 18. py And the following command: python -m mypy . Feb 25, 2021 · msgspec is heavily tied to the CPython c-api for performance. field (default = 0. __struct_config__. Struct, frozen=True, forbid_unknown_fields=True, omit_defaults=True, ): longitude Apr 10, 2023 · Description Hello, I've been struggling with this for a few days already and can't find a solution. datetime objects, holding strict conformance to RFC3339. Jul 23, 2022 · msgpsec: https://github. 0 as well as the current main branch. PyPy does support a subset of the CPython c-api, but it does so in a way that is not very performant, and isn't 100% compatible. convert, which was a later addition. responses import MsgSpecJSONResponse from fastapi_msgspec . To associate your repository with the msgspec topic, visit Dec 2, 2022 · Currently msgspec supports encoding and decoding only timezone-aware datetime. This is a common issue in msgpack decoders, as the protocol prefixes array messages with their sizes. Jun 2, 2022 · Hello, I've got a service written in Python that reads data from ElasticSearch frequently 24/7. convert from an object with from_attributes=True to a struct that contains a Raw field doesn't appear to work. If you would like to improve the msgspec recipe or build a new package version, please fork this repository and submit a PR. pip install fastapi-msgspec Usage from fastapi import FastAPI from fastapi_msgspec . In Fedora, we try to build this package with Python 3. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - jcrist/msgspec Dec 27, 2024 · msgspec is a fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML. Jun 1, 2024 · Howdy! I'm trying to test cattrs on Python 3. float64(1. field. com/jcrist/msgspec/blob/main/benchmarks/bench_validation. Since then, the service runs out of memory pretty quickly. msgpack. 14 venv3. Oct 1, 2024 · Description OS: macOS Sonoma 14. msgspec integration for Flask This project was inspired by the flask-pydantic package created by bauerji and the Litestar framework, however while the validate decorator appears similar to the one found in flask-pydantic there are many differences. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/msgspec/_core. Description It seems that nested array_like=True is not working as expected. I assume, that for efficiency reasons, msgspec does validation on deserialization in C code, once the final data type objects are constructed in the chain. No argument there. If you know the schema in advance, you can specify the schema to the datamodel-code-generator CLI to generate a Struct (or multiple Structs) for you (as generated code). json namespace instead. Description With the following code: import msgspec as ms class Base(ms. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - Issues · jcrist/msgspec If this is something you're willing to accept into msgspec, I can make time to PR support for it, but I understand that there may be reasons not to fully support all of the things typing does without first considering the implications of it on serialization and potential ambiguities. Dec 11, 2023 · Description There are a wide variety to objects that get mapped to strings which would seem to preclude being able to properly deserialize them with msgspec 😢 Simple example - encode/decode kwargs consisting of ~primitive types: >>> from A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/versioneer. json_schema perhaps? 👍 on this, I think having these methods be top-level is a much better Jan 19, 2024 · Description Problem: I want to be able to omit None fields from the json serialization, to make the serialization more compact. However, my use case is - as usual - Litestar, where we swapped to msgspec for our internal parsing and validation needs. 🎉 Support for a wide variety of Python types. datetime objects can be encoded using a custom enc_hook, but there's no way to decode a Description Currently msgspec only supports encoding Enum values that strings or integers, throwing msgspec. py at main · jcrist/msgspec Sep 3, 2024 · Description Hi, Would there be any interest in adding support for numpy datatypes? Currently, attempting to encode these fails: import msgspec. I've added a msgspec converter in the next version so now we optionally depend on msgspec, which means I can't test on 3. 6. Recently I've migrated it from orjson to msgspec. Oct 8, 2022 · class Example (Struct): x: int y: int = msgspec. Architecture Dec 9, 2023 · I'm using msgspec for API response validation, so I wrote this: class Response(Struct, frozen=True, kw_only=True): pass So all of the responses should be created by passing kwargs, and they can't be modified by accident. structs import fields T = TypeVar("T") class Ge Apr 7, 2023 · Thanks for opening this. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/msgspec/yaml. Sep 7, 2023 · Saved searches Use saved searches to filter your results more quickly Description The msgspec. router . This project was inspired by the flask-pydantic package created by bauerji and the Litestar framework, however while the validate decorator appears similar to the one found in flask-pydantic there are many differences. Struct, gc = False, array_like = True): dtype: str shape: tuple data: bytes numpy_array_encoder = msgspec. To reproduce, I did: [msgspec (main)]$ uv venv --python=python3. msgspec is a fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML. From my perspective the only blockers to fully switch to msgspec. The JSON and MessagePack implementations regularly benchmark as the fastest options for Python. For example, without array_like=True: class Position( msgspec. Struct type with a field of type type? Serialization (msgspec's primary purpose)? Or are you trying to use msgspec for runtime validation of other bits of your program, (as suggested in #513). gomfc kobuw uouinr azbae qqdtit srllzgj xpmoci gte ccear uyiag zzkmd ueavd syiu zqvct hwo