Exclude IO from __init__.py

tools/update_init_file.py

@@ -6,7 +6,7 @@
 import sys
 from pathlib import Path
 from os.path import abspath, dirname, join
-from typing import TypeVar, Type, cast, List, Any, Optional, Iterable, Union
+from typing import TypeVar, Type, cast, List, Any, Optional, Iterable, Union, IO
 
 import black
 
@@ -80,6 +80,7 @@ def _is_relevant_attribute(attr_name):
         or attr is Optional
         or attr is Iterable
         or attr is Union
+        or attr is IO
         or attr_name == "TypingDict"
     ):
         return False