Well, then I think there is nothing to do this.

Compatibility with context manager protocol is not a goal if it does nothing on exit. In any case you can easy to make it in three lines:

@contextmanager
def mymkdtemp():
    yield mkdtemp()

NamedTemporaryFile is more complex than mkstemp(). It creates a file object and closes a file descriptor even if leave the file on the filesystem.