fix typo (#16720)
diff --git a/Lib/os.py b/Lib/os.py
index 0557f14..dbebf89 100644
--- a/Lib/os.py
+++ b/Lib/os.py
@@ -275,7 +275,7 @@
     while head and tail:
         try:
             rmdir(head)
-        except OSrror:
+        except OSError:
             break
         head, tail = path.split(head)