[Python-flask] Issue with code generation for swagger models with array of referenced items

Hello,

we want to use swagger-codegen to generate python3 models from swagger 2.0 specification
received from Go server code.
The problem is that models which includes array of other items inlined by reference lead to unusable python code genereted for models(result models https://gist.github.com/IgorSysoev73/b7a9cd9e91844d30e9d0584843c28f54).

Is there any way to make it works or it is unsupported in python-flask code generator?

Swagger-codegen version

3.0.24

Swagger declaration file content

{
  "produces": [
    "application/json"
  ],
  "schemes": [
    "http",
    "https"
  ],
  "swagger": "2.0",
  "info": {
    "description": "Description",
    "title": "Some API",
    "version": "v1.2"
  },
  "basePath": "/api/v2",
  "paths": {
  },
  "definitions": {
    "ArrayOfItems": {
      "type": "array",
      "items": {
        "$ref": "#/definitions/ArrayItem"
      },
      "x-go-package": "nc/pkg/models"
    },
    "ArrayItem": {
      "type": "object",
      "properties": {
        "id": {
          "description": "id",
          "type": "integer",
          "format": "int32",
          "x-go-name": "ID"
        }
      },
      "x-go-package": "nc/pkg/models"
    }
  }
}

Command line used for generation

swagger-codegen generate -i swagger.spec.json -l python-flask -o out_code_dir

Start by running the provided swagger-codegen 3.0.24 command with the inline Swagger 2.0 definitions and compare the generated Python models with the linked example. Trace the python-flask generator templates or model-generation entry point responsible for arrays whose items use $ref; done means the generated models are usable Python and correctly represent ArrayOfItems containing ArrayItem objects.