Msgspec github. See the documentation for more information.
Msgspec github In keeping with msgspec's principles of strictness and correctness, I'd like for the lib Aug 11, 2023 路 Perhaps having the default value configured via an environment variable so users can set MSGSPEC_VALIDATE=sample or something to enable sampling instead of the default of complete checking. Generate Click options from msgspec types. 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 . Struct` codec implementation which will be more filled out in the next commit. msgspec is designed to be as performant as possible, while retaining some of the nicities of validation libraries like pydantic. Structs from JSON Schema. from __future__ import annotations import msgspec import hikari import json import typing as t class Payload GitHub is where people build software. Oct 17, 2023 路 Description The msgspec. Struct, omit_defaults=True): f1: str = "" f2: int = 0 class Struct(ms. msgspec is designed to be as performant as possible, while retaining some of the nicities of validation libraries like pydantic. Thanks for the input, it works, kind of inconvenient for me that the baseclass is "private", but that is just how it is 馃し. Through use of Python’s type annotations, messages are validated during deserialization in a declarative way. decode(b"[[1,2,3,4,5], [3,4,5,6,7], [8,") Will throw: DecodeError: Input data was truncated Which is pretty lacking in information. May 18, 2024 路 Question Hello, and thanks as always for the amazing library. These types are intentionally unsupported right now - see my comments in #248 for the reasoning behind this decision. Dec 11, 2023 路 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 馃槩 Simple example - encode/decode kwargs consisting of ~primitive types: >>> from msgspec is a fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML. 12. +1 for this. Something like msgspec. Although msgspec and pydantic have different aims and features, it's definitely fair to say pydantic now has a new benchmark to work towards. Meta(min_length=1)] type NonEmptyStringTypeAlias = Annotated[str, ms. It works the same as setattr , but will still work on a frozen struct. As you know, we have a lot of software depending on msgspec and we can't release until this is moved as well. Jun 18, 2024 路 Msgspec vs Pydantic v2. compile(r"\s*,\s*") class AlbumArtist(TaggedBase, kw_onl Oct 23, 2023 路 Not that it is major issue, but given that kw_only and rename are part of class constructor (as well as all StructConfig fields) the expectation is/was that they will also be carried along (inherited by subclasses). This is my current solution: # to avoid extra whitespace SPLIT_PATTERN: re. 12, and I'm having some issues with the installing msgspec. Recently I've migrated it from orjson to msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/README. Is there a way to process custom types with "from_builtin". decode ? I'd like to be able to encode/decode into regular Python objects, specifically SQLAlchemy. The first one is from msgspec, while the second one is from pydantic v2, which works fine with the openai API. msgspec is flexible. convert() to convert to a Struct with from_attributes=True, the Struct's __post_init__ is not called. R Description Description Converting using msgspec. Question I want to convert an incoming comma-separated string to a set of enum members. 6. PYTHONMALLOC=malloc memray run --follow-fork test_orjson. Struct, k Description if msgspec. convert, which was a later addition. In Fedora, we try to build this package with Python 3. See the documentation for more information. Aug 2, 2023 路 Description for example import msgspec msgspec. 4, python 3. Where does one put that schema so that FastAPI uses it as the schema for the endpoint's response body in the Jul 25, 2023 路 Actually, the attrs integration made me start using msgspec, because I find cattrs unnecessarily complicated and using msgspec to convert sqlalchemy. structs import fields T = TypeVar("T") class Ge Production-ready, Light, Flexible and Extensible ASGI API framework | Effortlessly Build Performant APIs - litestar-org/litestar May 16, 2023 路 msgspec works out-of-the-box with standard python static analysis tools like mypy/pyright, meaning no msgspec-specific typing extensions need to be installed or configured. 13. ArchLinux is one -> and our applications did stop working . To associate your repository with the msgspec topic, visit Oct 19, 2024 路 Saved searches Use saved searches to filter your results more quickly Feb 20, 2024 路 Description The following code: import msgspec as ms class Sub(ms. name ? Dec 30, 2022 路 When trying to encode subclasses of supported types, some will result in a TypeError, while others work as expected. tar. Other Considerations. Struct or using a raw dict). From my perspective the only blockers to fully switch to msgspec. Meta(max_length=6)] Importing the TestModel for further unit testing from tests. 2. Aug 21, 2023 路 Both issues could be addressed by introducing special methods (say __msgspec_decode__ / __msgspec_encode__) that if implemented on a non natively supported type, they define the (default) decoding/encoding logic for this particular type (i. Besides code quality, this is one of the steps required for us to make use of the new per-interpreter GIL subinterpreters feature in CPython 3. For example, without array_like=True: class Position( msgspec. Aug 14, 2022 路 import operator import msgspec def make_decode_for (type, prefix = ""): # Construct simple struct types at runtime modeling the prefix. First of all, msgspec looks really impressive, congratulations. In many cases this isinstance check is sufficient! Mar 23, 2024 路 Question One can generate a json schema from a msgspec. responses import MsgSpecJSONResponse from fastapi_msgspec . Struct, frozen=True): class Child(Base): assert Child. You switched accounts on another tab or window. Jul 3, 2012 路 You signed in with another tab or window. We should transition to use the newer multi-phase init process. convert({'hash': b Hi there, thank you for your great library! We are investigating a switch from pydantic to msgspec. Naive datetime. 14 venv3. split (". bar [0] This means that any user of the - "msgspec-python313-pre" package who installs it by running the command - "pip install python-json-logger[dev]" in the python 3. type_info . x. This could also support defining MSGSPEC_VALIDATE=0 to disable all runtime validation checking, which may be useful in a production setting (idk). To reproduce, I did: [msgspec (main)]$ uv venv --python=python3. No argument there. Struct using msgspec. Is there a way to supp Apr 7, 2023 路 Thanks for opening this. If you would like to improve the msgspec recipe or build a new package version, please fork this repository and submit a PR. Fix bug preventing decoding dataclasses/attrs types with default values and slots=True, frozen=True . More work is needed to add support for freethreading (and build wheels supporting it). c at main · jcrist/msgspec Jun 1, 2024 路 Howdy! I'm trying to test cattrs on Python 3. Aug 24, 2023 路 Many of the builtin attrs validators are already supported in msgspec via other mechanisms, and will be both slower and duplicate work. Description Hello. msgspec is friendly. /froze Jul 16, 2023 路 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. from_builtins to parse the other model. A small msg-length-prefix framing is implemented as part of the type and we use `tricycle. pip install msgspec Collecting msgspec Downloading msgspec-0. distros with rolling releases started to switch to Python 3. 18. 13 . Support unhashable Annotated metadata in msgspec. Raw] , then copy over the fields that are not in my struct. to avoid polluting the Struct method namespace, this should probably be a top-level method in the msgspec. if dec_hook/enc_hook are not given), something like this: Jun 7, 2023 路 Description First, thanks for the amazing work on this project. We currently properly handle nested NewType declarations (e. asdict(obj) results in this error: AttributeError: module 'msgspec' has no attribute 'structs' I am running m 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. Struct): x: int y: int obj = Point(x=1, y=2) msgspec. In this case, it doesn't really matter how it is done, because the full pipeline is implemented in msgspec itself. Oct 2, 2023 路 Description So I'm trying to switch over to 3. While I was busy asking myself how to do validation with msgspec, I did not ask myself whether msgspec should do any validation at all. It features: Runner Environment: github-hosted; Jul 23, 2022 路 Hi @jcrist, thanks so much for this. msgspec. py at main · jcrist/msgspec Dec 20, 2022 路 You signed in with another tab or window. Many parsers preallocate buffers during parsing for efficiency. . but its not written in C. Union, but then again that might also disqualify my opinion a bit. with enc_hook and ext_hook, we can have original python value back after encoding and decoding. As such, we need to match dataclass semantics, and one of those semantics is that only parameters with default values specified may be optional, all other parameters are A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/msgspec/yaml. encode`, but if you're # pretty-printing JSON then you usually don't care as much about performance def default (obj): """Roundtrip stdlib unsupported types through msgspec Description Currently msgspec only supports encoding Enum values that strings or integers, throwing msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/msgspec/_core. MsgspecStream` type which can be swapped in for `msgspec` serialization transparently. See jcrist/msgspec#27. We see test errors, on 0. The other process then tries to dump the class and initialize it. Feb 4, 2023 路 You signed in with another tab or window. Each type # has a single field (the part of the prefix). Aug 21, 2023 路 You however are using msgspec. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects. Contribute to LonelyVikingMichael/starlite-msgspec development by creating an account on GitHub. Aug 1, 2022 路 Consider: msgspec. Contribute to aleksul/repid-msgspec development by creating an account on GitHub. By the point its throwing it (correct me if i'm wrong), we've already parsed some A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/pyproject. Not sure if any encoding speedups are currently noticeable especially without any validation going on yet XD. Aug 12, 2023 路 Description I often use aiohttp client and it requires Callable -> str Is there any support for encoding to string instead of bytes? Or should I use something like that? encoder = json. Once we redo our extension mechanism to allow for selectively overriding how types are encoded/decoded it'll be possible for us to natively handle scalar-type (e. _ipc. 12's pre-releases, so the dev branch should at least remain compatible. You signed out in another tab or window. py -s localhost:9092 -t test-c 99999 Results Find the result files starting with memray- in the current directory. 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. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - jcrist/msgspec Generate Click options from msgspec types. gz (208 kB) Installing build dependencies done Getting requirements t Oct 1, 2024 路 Description OS: macOS Sonoma 14. fields . 19. py -s localhost:9092 -t test-c 99999 PYTHONMALLOC=malloc memray run --follow-fork test_msgspec. Nov 29, 2024 路 You signed in with another tab or window. schema. This is a common issue in msgpack decoders, as the protocol prefixes array messages with their sizes. Architecture Description When setting both omit_defaults and array_like to True, defaults are not omitted. The best way I can figure to do this now is to double decode the same json document: once with my struct (dict=True), and then again with dict[str, msgspec. The fallback function can then handle the unsupported object using only msgspec compatible types. e. Description With the following code: import msgspec as ms class Base(ms. 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. Reload to refresh your session. defstruct (f"prefix_ {field} ", [(field, type)]) # Create a decoder for the type dec Nov 23, 2022 路 Since there is currently no way to override how natively supported types are serialized (enc_hook only allows to extend serialization to support non-natively supported types), this would mean a breaking change for us, which unfortunately means it's going to be very hard to adopt msgspec. float64(1. Aug 30, 2024 路 Saved searches Use saved searches to filter your results more quickly pip install fastapi-msgspec Usage from fastapi import FastAPI from fastapi_msgspec . Structs are the repr, converter and validator functionalities of attrs. field (private = True) z: int = msgspec. With regards to how to potentially support unions, I think I have personally been hitting my head against some reasonably sophisticated typing problems that I would not have a problem with using types. md at main · jcrist/msgspec Feb 25, 2021 路 msgspec is heavily tied to the CPython c-api for performance. Struct): key: Annotated[str, msgspec. 0)) Traceback (most recent call las Dec 28, 2024 路 msgspec is resource-efficient and therefore predestined for "small setups" (architectures) / it would be nice if we had the pre-builds for such architectures . json_schema perhaps? 馃憤 on this, I think having these methods be top-level is a much better Description It seems that nested array_like=True is not working as expected. St Oct 4, 2023 路 Description. from dataclasses import dataclass import msgspec @dataclass class Feb 17, 2023 路 Would you say that inasmuch as their classes remain purely data-driven and declarative, then msgspec is ideal, but as they become loaded with more business logic that maybe it's not the use case msgspec is targeting? I'd say that msgspec is primarily concerned with easy and performant (de)serialization of python objects. This plot shows the performance benefit of performing type validation during message decoding (as done by msgspec) rather than as a secondary step with a third-party library like cattrs or pydantic V1. inspect. Currently, I can do this by setting omit_defaults to True, and adding a default of None to each field. schema support . Nov 6, 2023 路 Description Currently (msgspec version 0. Encoders (for example) currently have no access to type annotation information - all decisions of how a value is encoded have to do with its concrete type. Row objects into our attrs domain models works very well. If your class is never Oct 2, 2022 路 Support for generic structs has been merged in #386 馃殌 馃殌. 14. convert will still make use of a dec_hook if defined, but if not will fallback to the isinstance checks provided above (since a custom object like Foo may be provided directly to msgspec. 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. I have a use case where I'm decoding a document with a huge amount of types, only a handful of which I care about. So I'll send my question here. In this benchmark msgspec is ~6x faster than mashumaro, ~10x faster than cattrs, and ~12x faster than pydantic V2, and ~85x faster than pydantic V1. msgpack. json. py Repid's msgspec extension. GitHub Gist: instantly share code, notes, and snippets. Jul 10, 2024 路 Msgspec's decision to have the tag field be a property of each struct instead might make this unreasonably difficult. routing import MsgSpecRoute app = FastAPI ( default_response_class = MsgSpecJSONResponse ) app . Description Setup Struct based class from typing import Annotated import msgspec class TestModel(msgspec. Since then, the service runs out of memory pretty quickly. Encoder () numpy_array_decoder = msgspec. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/versioneer. __struct_config__. It features: 馃殌 High performance encoders/decoders for common protocols. It natively supports a wide range of Python builtin types. Struct, omit_defaults=True Dec 2, 2022 路 import msgspec import json def pretty_json (obj): """Pretty-print JSON, supporting all types that msgspec supports""" # This will be slower than a single `msgspec. route_class = MsgSpecRoute A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - litestar-org/litestar-msgspec Jun 19, 2022 路 I think supporting json schema would be critical for msgspec to be an alternative to Pydantic. datetime objects can be encoded using a custom enc_hook, but there's no way to decode a In msgspec, validation is only applied for the back-transform. g. 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. Here's the scenario: from msgspec import Struct from msgspec. GitHub is where people build software. Mar 7, 2021 路 As per original questions and discussion with `msgspec` author: - jcrist/msgspec#25 - jcrist/msgspec#140 this prototypes a new (but very naive) `msgspec. Description When using msgspec. However, this will be slow (much slower than using a msgspec. Pattern[str] = re. , same fields). Met A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - Workflow runs · jcrist/msgspec May 12, 2021 路 Feature request, make it possible to specify a fallback function that is called when the encoder encounters an unsupported object. convert(b'qq', type=str, strict=False) class S(msgspec. ")): type = msgspec. BufferedReceieveStream` to handle buffering logic for the underlying transport. json namespace instead. 12 until it's actually released, but I fixed the incompatibilities and setup CI to test against 3. Below are two versions of JSON schemas generated from the same model (i. It's a real joy to use :) I have the following struct declaration, which is part of a more complex struct that I'm trying to decode: class ServingForExport(msgspec. Oct 8, 2022 路 class Example (Struct): x: int y: int = msgspec. structs import fields T = TypeVar("T") class Ge Jul 13, 2023 路 When I opened this, I think I was enthusiastic to play with constraints and didn't give it much thought. Feb 5, 2023 路 This lets msgspec efficiently handle json and msgpack for you without requiring unnecessary allocations. for field in reversed (prefix. Struct, gc = False, array_like = True): dtype: str shape: tuple data: bytes numpy_array_encoder = msgspec. The specification of the messaging format for my ventcon project - GitHub - ventcon/ventcon-msgspec: The specification of the messaging format for my ventcon project Jul 24, 2023 路 I probably just want to treat the extra fields as msgspec. A recent experience has made me reconsider this. I've developed a small django app that reads big . We previous use msgpack-python and have fine-grained control how python type are encoded, for example Decimal and datetime and set. like test. 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. 13 until you support it. 13 (beta1). datetime objects, holding strict conformance to RFC3339. force_setattr to handle this task. Raw for this, but maybe bring them in as builtins in a similar case. Struct): hash: bytes content: str msgspec. int, str) subclasses treating them as their base classes if no extension is registered. encode / msgspec. Nov 7, 2023 路 Question What is the correct way to decode part of json file? Is there a way to do this without defining class Stuct for every level? Also how to handle when the keys have a . To send the class to a different process I am using cloudpickle to pickle a class (which is using the Struct as message). py at main · jcrist/msgspec A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - jcrist/msgspec Jan 31, 2022 路 A (naive) benchmark comparing pydantic & msgspec performance - bench. 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 Apr 10, 2023 路 Description Hello, I've been struggling with this for a few days already and can't find a solution. field. NewType("A", NewType("B",int))), but don't handle Annotated wrappers inside a NewType (I didn't know this was allowed). Oct 27, 2024 路 Really love mesgspec but without python 3. 1 Python 3. 0 as well as the current main branch. obj. 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. First experiments toward #196 Feb 2, 2023 路 Thanks for opening this. May 26, 2023 路 Description Is there an equivalent to from_builtins, but for objects? Or maybe msgspec. EncodeError: Only enums with int or str values are supported when attempting to encode anything else. 0a3. asdict(obj) results in this error: AttributeError: module 'msgspec' has no attribute 'structs' I am running m Oct 22, 2022 路 from msgspec import Struct from msgspec. gz (216 kB) Installing build dependencies done Getting requirements to build wheel done Preparing metadata (py You might want to check out datamodel-code-generator, which can generate msgspec. Jul 3, 2023 路 We won't be publishing built packages for python 3. I'm going to add generics support for dataclasses and attrs too before cutting a release (hopefully sometime in the first week of May). Add CI support Synchronize around caches Synchronize around critical sections (I believe these mostly exist Apr 25, 2023 路 I am using msgspec to experiment with a distributed system, msgspec is used for message passing between different processes. This does violate the frozen guarantees, so should only be used when you know what you're doing. This definitely makes sense that if you're already using msgspec. router . Struct is faster than dataclasses, can msgspec also provide enums? There is fastenum which claims to be faster than regular python enum. We could add shims everywhere that's needed to make msgspec PyPy compatible, but that would muddy up the code, increasing our maintenance burden. However, my use case is - as usual - Litestar, where we swapped to msgspec for our internal parsing and validation needs. Production-ready, Light, Flexible and Extensible ASGI API framework | Effortlessly Build Performant APIs - litestar-org/litestar Jul 13, 2023 路 When I opened this, I think I was enthusiastic to play with constraints and didn't give it much thought. Jun 2, 2023 路 I would like a similar means of structuring these kinds of objects in msgspec so that I can fully migrate. msgspec currently uses the old style single-phase init for module import. json import decode class Point(Struct, array_like=True): lng: float lat: float class Shape(Struct, Sep 5, 2023 路 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. Validate str constraints on dict keys when decoding msgpack . Struct, frozen=True, forbid_unknown_fields=True, omit_defaults=True, ): longitude Description Problem: I want to be able to omit None fields from the json serialization, to make the serialization more compact. frozen is True In a file: frozen. dict(db_record) - while this will convert the top-level object to something from_builtins can mostly handle, it will not convert the nested objects; I would like msgspec to handle the entire conversion process. json files and decodes them in order to build some objects and store them in the DB usi Sep 3, 2024 路 Description Hi, Would there be any interest in adding support for numpy datatypes? Currently, attempting to encode these fails: import msgspec. toml at main · jcrist/msgspec Jun 11, 2021 路 Add a `tractor. However the openHAB project uses an unconventional json-in-json approach (see payload field). A msgspec serialisation plugin for Starlite v1. In #711 we added support for Python 3. Feb 2, 2022 路 Dataclasses aren't natively supported, but could be handled with a custom enc_hook and dec_hook. py at main · jcrist/msgspec Aug 25, 2022 路 import msgspec. Description Hi there :) This code from the doc class Point(msgspec. Apr 18, 2024 路 Question Basically, I am trying to set the alias of the Struct field, via typing. This can cause the benchmarks to vary drastically between runs, even minutes apart. msgpack import numpy as np import timeit class NumpySerializedRepresentation (msgspec. field (default = 0. Dec 27, 2024 路 msgspec is a fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML. py And the following command: python -m mypy . It works as expected with dataclasses. Mar 10, 2023 路 Description Hello, I did not find any sort of chat/mailing list/forum. encode(np. convert as input). Support passing parametrized generic struct types to msgspec. Jan 31, 2024 路 It doesn't like how msgspec produces the schema because there isn't a type field at the root level. Error: Collecting msgspec Using cached msgspec-0. Jan 18, 2024 路 Description Some example code using a Struct with rename="camel": from dataclasses import dataclass from msgspec import Struct, convert @dataclass class ThingModel: thing_id: str class Thing(Struct, rename="camel"): thing_id: str tm = Th Dec 6, 2022 路 Hi again, So I encountered an issue when trying to integrate msgspec into the internal of our libraries, namely - there is no way for me to easily access the field information on a struct. msgspec also works well with other type-checking tooling like mypy and pyright, providing excellent editor integration. Encoder() se Apr 17, 2023 路 I am currently thinking about using msgspec to use as a web socket deserializer for HABApp. Nov 29, 2024 路 Question @jcrist I know you are busy and thank you for everything you have done so far for all of us. Our main usecase is messaging (commands, events) through a message broker. Contribute to ofek/msgspec-click development by creating an account on GitHub. 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. For supported types, encoding/decoding a message with msgspec can be ~10-80x faster than alternative libraries. model import Te May 30, 2021 路 Can only really use an encoder currently since there is no streaming api in `msgspec` as of currently. json as mjson import numpy as np mjson. A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - msgspec/setup. x environment will be installing the malicious dependency - "msgspec-python313-pre" automatically which can be seen in this Jan 19, 2023 路 Thanks for well written issue (and corresponding PR)! This turns out to be a deeper issue than just enabling msgspec. structs. convert from an object with from_attributes=True to a struct that contains a Raw field doesn't appear to work. 13 its not any longer an option . Struct): result: msgspec. It would be great to either support subclasses in general, or at least have an explanation of these limitations in the d The way msgspec is designed, serialization information generally lives on the encoder/decoder rather than on the type itself. Annotated[], however, the following code fails. 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 2, 2022 路 Hello, I've got a service written in Python that reads data from ElasticSearch frequently 24/7. Nov 19, 2023 路 I've added msgspec. Mar 19, 2023 路 Description I sometimes have JSON objects where the presence or absence of a field is semantically distinct from whether that field's value is null. structs import cached_property class Foo (Struct): bar: tuple [str] # This version of cached_property automatically allocates # the slot and marks it as private, no extra configuration needed @ cached_property def bar_inner (self) -> str: return self. 12) the following: import msgspec as ms from typing import Annotated NonEmptyStringAlias = Annotated[str, ms. 14 [msgspec (main A fast serialization and validation library, with builtin support for JSON, MessagePack, YAML, and TOML - Issues · jcrist/msgspec Dec 2, 2022 路 Currently msgspec supports encoding and decoding only timezone-aware datetime. 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). Mar 20, 2025 路 You signed in with another tab or window. Add CI support Synchronize around caches Synchronize around critical sections (I believe these mostly exist Jun 18, 2024 路 Msgspec vs Pydantic v2. Use your normal parsing code to make a big dict of all the other info (path, query, cookie, and header parameters), then pass that to either pydantic or msgspec. Here is example: import msgspec class Int64(int): pass class Box(msgspec. fvdcux schiv nkw iozaief vun gvgnddm zibalh cwspm szehh brar xtvydx ptgvr ulpiqd lbk xmofsz