improve: introduce isort for linting Python imports (#1983)

api/controllers/service_api/app/completion.py

@@ -1,24 +1,23 @@
 import json
 import logging
-from typing import Union, Generator
-
-from flask import stream_with_context, Response
-from flask_restful import reqparse
-from werkzeug.exceptions import NotFound, InternalServerError
+from typing import Generator, Union
 
 import services
 from controllers.service_api import api
 from controllers.service_api.app import create_or_update_end_user_for_user_id
-from controllers.service_api.app.error import AppUnavailableError, ProviderNotInitializeError, NotChatAppError, \
-    ConversationCompletedError, CompletionRequestError, ProviderQuotaExceededError, \
-    ProviderModelCurrentlyNotSupportError
+from controllers.service_api.app.error import (AppUnavailableError, CompletionRequestError, ConversationCompletedError,
+                                               NotChatAppError, ProviderModelCurrentlyNotSupportError,
+                                               ProviderNotInitializeError, ProviderQuotaExceededError)
 from controllers.service_api.wraps import AppApiResource
 from core.application_queue_manager import ApplicationQueueManager
 from core.entities.application_entities import InvokeFrom
-from core.errors.error import ProviderTokenNotInitError, QuotaExceededError, ModelCurrentlyNotSupportError
+from core.errors.error import ModelCurrentlyNotSupportError, ProviderTokenNotInitError, QuotaExceededError
 from core.model_runtime.errors.invoke import InvokeError
+from flask import Response, stream_with_context
+from flask_restful import reqparse
 from libs.helper import uuid_value
 from services.completion_service import CompletionService
+from werkzeug.exceptions import InternalServerError, NotFound
 
 
 class CompletionApi(AppApiResource):