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

api/core/file/file_obj.py

@@ -1,12 +1,11 @@
 import enum
 from typing import Optional
 
-from pydantic import BaseModel
-
 from core.file.upload_file_parser import UploadFileParser
 from core.model_runtime.entities.message_entities import ImagePromptMessageContent
 from extensions.ext_database import db
 from models.model import UploadFile
+from pydantic import BaseModel
 
 
 class FileType(enum.Enum):

api/core/file/message_file_parser.py

@@ -1,12 +1,11 @@
-from typing import List, Union, Optional, Dict
+from typing import Dict, List, Optional, Union
 
 import requests
-
-from core.file.file_obj import FileObj, FileType, FileTransferMethod
+from core.file.file_obj import FileObj, FileTransferMethod, FileType
 from core.file.upload_file_parser import SUPPORT_EXTENSIONS
 from extensions.ext_database import db
 from models.account import Account
-from models.model import MessageFile, EndUser, AppModelConfig, UploadFile
+from models.model import AppModelConfig, EndUser, MessageFile, UploadFile
 
 
 class MessageFileParser:

api/core/file/upload_file_parser.py

@@ -6,9 +6,8 @@ import os
 import time
 from typing import Optional
 
-from flask import current_app
-
 from extensions.ext_storage import storage
+from flask import current_app
 
 SUPPORT_EXTENSIONS = ['jpg', 'jpeg', 'png', 'webp', 'gif', 'svg']