[PATCH 1/4] Python/iotests: Add type hint for nbd module

[John Snow]

The test bails gracefully if this module isn't installed, but linters
need a little help understanding that. It's enough to just declare the
type in this case.

(Fixes pylint complaining about use of an uninitialized variable because
it isn't wise enough to understand the notrun call is noreturn.)

Signed-off-by: John Snow <jsnow@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
---
 tests/qemu-iotests/tests/nbd-multiconn | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/tests/qemu-iotests/tests/nbd-multiconn 
b/tests/qemu-iotests/tests/nbd-multiconn
index 478a1eaba2..7e686a786e 100755
--- a/tests/qemu-iotests/tests/nbd-multiconn
+++ b/tests/qemu-iotests/tests/nbd-multiconn
@@ -20,6 +20,8 @@
 
 import os
 from contextlib import contextmanager
+from types import ModuleType
+
 import iotests
 from iotests import qemu_img_create, qemu_io
 
@@ -28,7 +30,7 @@ disk = os.path.join(iotests.test_dir, 'disk')
 size = '4M'
 nbd_sock = os.path.join(iotests.sock_dir, 'nbd_sock')
 nbd_uri = 'nbd+unix:///{}?socket=' + nbd_sock
-
+nbd: ModuleType
 
 @contextmanager
 def open_nbd(export_name):
-- 
2.41.0