Simplify model interface

[Kircheneer]

This is a draft of an attempt to simplify the interface for defining models a bit. Here is what an example model definition now might look like:

from typing import Annotated, List. Optional

from diffsync.enum import DiffSyncFieldtype
from diffsync import DIffSyncModel


class City(DiffSyncModel):
    _modelname = "city"

    name: Annotated[str, DiffSyncFieldType.IDENTIFIER]
    population: Annotated[int, DiffSyncFieldType.ATTRIBUTE]


class Country(DebugModel):
    _modelname = "country"

    name: Annotated[str, DiffSyncFieldType.IDENTIFIER]
    iso_code: Annotated[Optional[str], DiffSyncFieldType.ATTRIBUTE]
    cities: Annotated[List[City], DiffSyncFieldType.CHILDREN, "city"] = []

Open points

• Evaluate, whether this breaking change (eyeing at 2.0) is worth it
• Documentation
• Think about further possibilites for simplification

[itdependsnetworks]

I thought that this was only available in 3.9 and above? https://docs.python.org/3/library/typing.html#typing.Annotated

[Kircheneer]

I thought that this was only available in 3.9 and above? https://docs.python.org/3/library/typing.html#typing.Annotated

True actually, I didn't know. Should use this for compatibility

[Kircheneer]

Closing for now.