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

api/controllers/web/completion.py

@@ -3,22 +3,21 @@ import json
 import logging
 from typing import Generator, Union
 
-from flask import Response, stream_with_context
-from flask_restful import reqparse
-from werkzeug.exceptions import InternalServerError, NotFound
-
 import services
 from controllers.web import api
-from controllers.web.error import AppUnavailableError, ConversationCompletedError, \
-    ProviderNotInitializeError, NotChatAppError, NotCompletionAppError, CompletionRequestError, \
-    ProviderQuotaExceededError, ProviderModelCurrentlyNotSupportError
+from controllers.web.error import (AppUnavailableError, CompletionRequestError, ConversationCompletedError,
+                                   NotChatAppError, NotCompletionAppError, ProviderModelCurrentlyNotSupportError,
+                                   ProviderNotInitializeError, ProviderQuotaExceededError)
 from controllers.web.wraps import WebApiResource
 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
 
 
 # define completion api for user