chore(study-filesystem): correct type and awkwardness in implementation

antarest/study/storage/rawstudy/ini_reader.py

@@ -109,7 +109,7 @@ def read(self, path: t.Any) -> JSON:
                     sections = self._parse_ini_file(f)
             except FileNotFoundError:
                 # If the file is missing, an empty dictionary is returned.
-                # This is required tp mimic the behavior of `configparser.ConfigParser`.
+                # This is required to mimic the behavior of `configparser.ConfigParser`.
                 return {}
 
         elif hasattr(path, "read"):

antarest/study/storage/rawstudy/model/filesystem/folder_node.py

@@ -1,7 +1,7 @@
 import shutil
 from abc import ABC, abstractmethod
 from http import HTTPStatus
-from typing import Dict, List, Optional, Tuple, Union
+from typing import List, Optional, Tuple, Union
 
 from fastapi import HTTPException
 
@@ -208,6 +208,6 @@ def extract_child(self, children: TREE, url: List[str]) -> Tuple[List[str], List
         for name in names:
             if name not in children:
                 raise ChildNotFoundError(f"'{name}' not a child of {self.__class__.__name__}")
-            if type(children[name]) != child_class:
+            if not isinstance(children[name], child_class):
                 raise FilterError("Filter selection has different classes")
         return names, sub_url