AttributeError: module 'openapi_client' has no attribute 'DefaultApi'.What's wrong with openapi-generator-cli-6.6.0.jar?

when create client code and run,it runs wrong.

openapi-generator version

6.6.0

OpenAPI declaration file content or url

openapi: 3.0.1
info:
title: TODO Plugin
description: A plugin that allows the user to create and manage a TODO list using ChatGPT. If you do not know the user's username, ask them first before making queries to the plugin. Otherwise, use the username "global".
version: 'v1'
servers:

• url: http://192.168.0.1:5003
  paths:
  /todos/{username}:
  get:
  operationId: getTodos
  summary: Get the list of todos
  parameters:
  • in: path
    name: username
    schema:
    type: string
    required: true
    description: The name of the user.
    responses:
    "200":
    description: OK
    content:
    application/json:
    schema:
    $ref: '#/components/schemas/getTodosResponse'
    post:
    operationId: addTodo
    summary: Add a todo to the list
    parameters:
  • in: path
    name: username
    schema:
    type: string
    required: true
    description: The name of the user.
    requestBody:
    required: true
    content:
    application/json:
    schema:
    $ref: '#/components/schemas/addTodoRequest'
    responses:
    "200":
    description: OK
    delete:
    operationId: deleteTodo
    summary: Delete a todo from the list
    parameters:
  • in: path
    name: username
    schema:
    type: string
    required: true
    description: The name of the user.
    requestBody:
    required: true
    content:
    application/json:
    schema:
    $ref: '#/components/schemas/deleteTodoRequest'
    responses:
    "200":
    description: OK

components:
schemas:
getTodosResponse:
type: object
properties:
todos:
type: array
items:
type: string
description: The list of todos.
addTodoRequest:
type: object
required:
- todo
properties:
todo:
type: string
description: The todo to add to the list.
required: true
deleteTodoRequest:
type: object
required:
- todo_idx
properties:
todo_idx:
type: integer
description: The index of the todo to delete.
required: true

Generation Details

I use java -jar openapi-generator-cli.jar generate -i openapi.yaml -g python -o . to create python code.It can create the code.But when I try to run the code ,it's wrong.
`import openapi_client # 这是生成的客户端库导入语句

设置服务器地址

configuration = openapi_client.Configuration(
host="http://127.0.0.1:5003"
)

创建 API 客户端实例

api_client = openapi_client.ApiClient(configuration)
api_instance = openapi_client.DefaultApi(api_client)

传入的 operationId

operation_id = "get_todos"

根据 operationId 获取对应的方法

operation_func = getattr(api_instance, operation_id, None)

if operation_func is not None and callable(operation_func):
# 调用方法
username = "your_username"
try:
response = operation_func(username)
print("Response:", response)
except openapi_client.ApiException as e:
print("Error:", e)
else:
print(f"Operation '{operation_id}' not found.")`

Start with the supplied openapi.yaml and the generated Python package in the output directory, then inspect the generated API class and its method names against operationId values such as getTodos. Reproduce with openapi-generator-cli 6.6.0 and confirm that the generated client exposes the expected API entry point and callable operation.