Replace IOError with OSError (#16715)
diff --git a/Lib/tokenize.py b/Lib/tokenize.py
index cbf91ef..2fbde0f 100644
--- a/Lib/tokenize.py
+++ b/Lib/tokenize.py
@@ -670,7 +670,7 @@
         error(err.args[0], filename, (line, column))
     except SyntaxError as err:
         error(err, filename)
-    except IOError as err:
+    except OSError as err:
         error(err)
     except KeyboardInterrupt:
         print("interrupted\n")