swagger-codegen erroneously import java.io.File

Description

If you generate code for python-flask using a spec file that contains a definition for an object called "File", swagger-codegen never creates the corresponding model file module and imports java.io.File into the generated default_controller.py.

Swagger-codegen version

2.3.1

Swagger declaration file content or url

swagger: "2.0"

info:
version: 0.0.1
title: Blah API
description: An API for interacting with the blah system

paths:

/files:

get:
  description: Retrieves information on files that match the specified criteria

  produces:
  - "application/json"

  parameters:
    - name: tags
      type: array
      description: The tags for which matching files are to be returned
      in: query
      items:
        type: string

  responses:
    '200':
      description: Successful response
      schema:
        type: array
        items:
          $ref: "#/definitions/File"

definitions:
File:
type: object
properties:
file_id:
type: "string"
format: "uuid"
path:
type: "string"
tags:
type: array
items:
type: "string"

Command line used for generation

java -jar /home/sknick/Misc/swagger-codegen-cli-2.3.1.jar generate -l python-flask -o ./Source -i ./api.yaml

Steps to reproduce

(Shown above.)

Related issues/PRs

Not sure.

Suggest a fix/enhancement

No idea.

Reproduce the report with the provided Swagger declaration and the python-flask generation command using swagger-codegen 2.3.1. Start at the python-flask generator and its templates, then verify that the File model is generated and that default_controller.py no longer imports java.io.File.