Comments (4)
I don't disagree - big fan of immutable data structures, and the explicit > implicit is true for sure. However - that's the json i got! msgspec
is so much faster than pydantic that i gotta ask, at least.
from msgspec.
One thing you could do now is to have a "private" field with optional list and a property that isn't optional.
from msgspec.
That's actually the direction i went, but the setters and append
was all a little bit beyond the level of hackery I was willing to commit. If it was a read-only field, the private optional field and non-optional @property
would work great. I was going to try to write some sort of helper class that would act like a list and support append, but eh. A bridge too far. Thanks for taking the time to reply though, I appreciate it!
from msgspec.
no prob. I am a big "immutables" fan, so wasn't thinking about the need for mutable fields.
another idea for you then - you can have phantom types, just for deserialization, which will have optional fields and post_init logic. Then you'll just convert from them to the final type to be used in the code. This can be easily automated, either via code generation (explicit approach), or you could even play around with generating the phantom types from the "true" types on the fly
on the topic, I think all the implicit logic, like treating nulls as missing value, is more headache then gain in the long run. pydantic was (or maybe still is) is so confusing with None/Optional handling. As PEP20 says - Explicit is better than implicit.
from msgspec.
Related Issues (20)
- Tighten typing of msgspec.json.schema
- Support numeric constraints for Decimal values
- Support decoding empty strings as unset for all field types
- Does msgspec have a concept of schema mode?
- Add an option to disable constraint checks
- Ability to add an example to a Struct as output to the JSON schema
- Unable to encode `lxml.etree._ElementUnicodeResult`
- fallback to dict for unknown type in tagged union? HOT 3
- Multiple types to same Struct HOT 1
- Encode field name
- msgspec.json.decode parsing a float value HOT 10
- Encode_into might not write data at the intended offset location if buffer is too small. HOT 4
- 3.13 support HOT 4
- Converting an object / dict to a struct where the struct contains a Raw field fails with "Expected `any`, got ..."
- Incorrect decoding of 65-bit integer HOT 1
- Is there a way to stop parsing long lists of JSON objects when an object with a certain property value is found
- Allow passing custom globals to use when converting dataclasses
- Positional-only arguments
- Settings Management HOT 3
- Accept hook functions in Meta for more ergonomic support of custom data types HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from msgspec.