feat(python): add --pydantic-base-model option

[alpoi-x]

Description

Adds a python option pydantic-base-model, which will generate classes inheriting pydantic's BaseModel.

Related Issue

#1474

Motivation and Context

Pydantic is a commonly used python module for defining schemas and dataclasses with validation. It is used in FastApi. It is a nice alternative to the builtin dataclasses module.

Previous Behaviour / Output

Quicktype generates standard classes or dataclasses (3.7+) for python

New Behaviour / Output

With the --pydantic-base-model option, it generates pydantic BaseModel classes

How Has This Been Tested?

Built and generated python from a schema, with and without --pydantic-base-model option.

Without the option included from dataclasses import dataclass and @dataclass

With the option instead included from pydantic import BaseModel and class Example(BaseModel)

Screenshots (if appropriate):

[zhao004]

Description

添加一个 python 选项 pydantic-base-model ，它将生成继承 pydantic 的 BaseModel 的类。

Related Issue

#1474

Motivation 和 Context

Pydantic 是一个常用的 python 模块，用于通过验证定义模式和数据类。它在 FastApi 中使用。它是内置 dataclasses 模块的一个很好的替代品。

上一页 Behaviour / Output

Quicktype 为 python 生成标准类或数据类 (3.7+)

创建 Behaviour / Output

使用 --pydantic-base-model 选项，它生成 pydantic BaseModel 类

How Has This Been Tested?

从模式构建并生成 python，带或不带 --pydantic-base-model 选项。

没有包含 from dataclasses import dataclass 和 @dataclass 选项

选项包含 from pydantic import BaseModel 和 class Example(BaseModel)

Screenshots (if appropriate):

---

This option does not exist.

[alpoi-x]

@zhao004 This is a pull request - code and changes included here are not part of the application until they are merged.

[zhao004]

@zhao004 This is a pull request - code and changes included here are not part of the application until they are merged.

When can the merger be completed?

[Masked42]

Is there a timeline for this mr? We are really looking forward to this feature

[bojanstef]

👍

[glebignatieff]

+1

[gaby]

@alpoi-x @zhao004 @inferrinizzard Any chance of getting this merged?

[inferrinizzard]

Will take a look in the next few days 👍

[inferrinizzard]

Is there an available screenshot or side-by-side example of the output with this new option compared against Python dataclasses ?

[alpoi-x]

@inferrinizzard
schema | with new option | without new option

[gaby]

@inferrinizzard Does the quicktype.io website get these updates?

Seems to be pointing to super old python versions.