Msgspec github This definitely makes sense that if you're already using msgspec. 14 venv3. Encoder () numpy_array_decoder = msgspec. 18. ArchLinux is one -> and our applications did stop working . convert(b'qq', type=str, strict=False) class S(msgspec. Mapped is used. field (private = True) z: int = msgspec. Struct definitions for use with the Ethereum Virtual Machine Msgspec Doesn't Decode Json Correctly when SQLAlchemy. to avoid polluting the Struct method namespace, this should probably be a top-level method in the msgspec. Since then, the service runs out of memory pretty quickly. CVE-2025-27607 fix. json namespace instead. 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. You switched accounts on another tab or window. I've developed a small django app that reads big . Struct): hash: bytes content: str msgspec. We see test errors, on 0. Jun 1, 2024 · Howdy! I'm trying to test cattrs on Python 3. The JSON and MessagePack implementations regularly benchmark as the fastest options for Python. structs import fields T = TypeVar("T") class Ge Apr 7, 2023 · Thanks for opening this. schema. structs. 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. encode(np. msgspec. Here we benchmark structs (with and without gc=False ) against standard Python classes (with and without __slots__ ). 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. 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. Row objects into our attrs domain models works very well. #820 opened Mar 3, 2025 by Vizonex Dec_hook callback for typed json decoding. You signed out in another tab or window. Struct` codec implementation which will be more filled out in the next commit. Where does one put that schema so that FastAPI uses it as the schema for the endpoint's response body in the Jul 3, 2012 · You signed in with another tab or window. 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. I wrote this up: mostly to get an understanding of how msgspec's performance compares with that: of pydantic V2. msgspec is a fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML. For example, without array_like=True: class Position( msgspec. 19. decode ? I'd like to be able to encode/decode into regular Python objects, specifically SQLAlchemy. In Fedora, we try to build this package with Python 3. 13 until you support it. . Something like msgspec. 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. Struct, gc = False, array_like = True): dtype: str shape: tuple data: bytes numpy_array_encoder = msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/msgspec/yaml. tar. convert as input). Oct 1, 2024 · Description OS: macOS Sonoma 14. 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. 13 . pip install msgspec Collecting msgspec Downloading msgspec-0. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - jcrist/msgspec A collection of msgspec. 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. Jul 23, 2022 · msgpsec: https://github. py at main · jcrist/msgspec Aug 2, 2023 · Description for example import msgspec msgspec. Description It seems that nested array_like=True is not working as expected. /froze More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects. Description With the following code: import msgspec as ms class Base(ms. 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. Oct 8, 2022 · class Example (Struct): x: int y: int = msgspec. To reproduce, I did: [msgspec (main)]$ uv venv --python=python3. 6. We could add shims everywhere that's needed to make msgspec PyPy compatible, but that would muddy up the code, increasing our maintenance burden. 🎉 Support for a wide variety of Python types. Aug 25, 2022 · import msgspec. 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. 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. 0 as well as the current main branch. field. encode / msgspec. 1 Python 3. 13 its not any longer an option . 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. Upon submission, your changes will be run on the appropriate platforms to give the reviewer an opportunity to confirm that the changes result in a successful build. Struct instances implement several optimizations for reducing garbage collection (GC) pressure and decreasing memory usage. msgpack import numpy as np import timeit class NumpySerializedRepresentation (msgspec. Feb 25, 2021 · msgspec is heavily tied to the CPython c-api for performance. Naive datetime. 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. 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. If you would like to improve the msgspec recipe or build a new package version, please fork this repository and submit a PR. 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) msgspec integration for Flask. router . The benchmark is modified from the one in the msgspec repo here: https://github. EncodeError: Only enums with int or str values are supported when attempting to encode anything else. Recently I've migrated it from orjson to msgspec. To associate your repository with the msgspec topic, visit Dec 2, 2022 · Currently msgspec supports encoding and decoding only timezone-aware datetime. No argument there. However, my use case is - as usual - Litestar, where we swapped to msgspec for our internal parsing and validation needs. 13 (beta1). Jun 2, 2022 · Hello, I've got a service written in Python that reads data from ElasticSearch frequently 24/7. datetime objects, holding strict conformance to RFC3339. 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). 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. distros with rolling releases started to switch to Python 3. Sep 7, 2023 · Saved searches Use saved searches to filter your results more quickly Description The msgspec. Structs from JSON Schema. json. Many parsers preallocate buffers during parsing for efficiency. frozen is True In a file: frozen. Dec 14, 2023 · In msgspec, validation is only applied for the back-transform. json files and decodes them in order to build some objects and store them in the DB usi A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - litestar-org/litestar-msgspec Mar 23, 2024 · Question One can generate a json schema from a msgspec. 14. 0a3. It features: 🚀 High performance encoders/decoders for common protocols. Struct): result: msgspec. 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. Struct, frozen=True): class Child(Base): assert Child. Generally, unless you control the CI runners with self-hosted boxes (which are unsafe on public Github projects!), you have no idea what machine you're going to get, or how many other jobs may be running on the same machine. 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. This can cause the benchmarks to vary drastically between runs, even minutes apart. com/jcrist/msgspec; pydantic_core + orjson: https://github. Aug 21, 2023 · What's your reasoning for defining a msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/setup. 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. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/msgspec/_core. convert from an object with from_attributes=True to a struct that contains a Raw field doesn't appear to work. Description Hello. 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. Here's the scenario: from msgspec import Struct from msgspec. Currently, I can do this by setting omit_defaults to True, and adding a default of None to each field. 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. routing import MsgSpecRoute app = FastAPI ( default_response_class = MsgSpecJSONResponse ) app . Contribute to Barsug/msgspec-python313-pre development by creating an account on GitHub. 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 . py: I make no claims that it's illustrative of all use cases. Structs are the repr, converter and validator functionalities of attrs. py at main · jcrist/msgspec Oct 27, 2024 · Really love mesgspec but without python 3. obj. pip install fastapi-msgspec Usage from fastapi import FastAPI from fastapi_msgspec . json as mjson import numpy as np mjson. com/jcrist/msgspec/blob/main/benchmarks/bench_validation. ghvc wag wpz mfoca fqp ydlj gujj jckm ctjbma qix eoyt wcri bftqln ecdtug tcir