bpo-30677: [doc] mention that os.mkdir() can raise FileNotFoundError (GH-31548)

diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index 6dffc4513365e35149fc40a6ba6bb861d1877c27..05e0303614ed1e96893e8d46eaae9dd7002280a9 100644 (file)
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -2050,7 +2050,8 @@ features:
 
    Create a directory named *path* with numeric mode *mode*.
 
-   If the directory already exists, :exc:`FileExistsError` is raised.
+   If the directory already exists, :exc:`FileExistsError` is raised. If a parent
+   directory in the path does not exist, :exc:`FileNotFoundError` is raised.
 
    .. _mkdir_modebits: