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

api/controllers/console/datasets/file.py

@@ -1,18 +1,14 @@
-from flask import request, current_app
-from flask_login import current_user
-
 import services
-from libs.login import login_required
-from flask_restful import Resource, marshal_with
-
 from controllers.console import api
-from controllers.console.datasets.error import NoFileUploadedError, TooManyFilesError, FileTooLargeError, \
-    UnsupportedFileTypeError
-
+from controllers.console.datasets.error import (FileTooLargeError, NoFileUploadedError, TooManyFilesError,
+                                                UnsupportedFileTypeError)
 from controllers.console.setup import setup_required
 from controllers.console.wraps import account_initialization_required
-from fields.file_fields import upload_config_fields, file_fields
-
+from fields.file_fields import file_fields, upload_config_fields
+from flask import current_app, request
+from flask_login import current_user
+from flask_restful import Resource, marshal_with
+from libs.login import login_required
 from services.file_service import FileService
 
 PREVIEW_WORDS_LIMIT = 3000