[PULL 06/15] qcow2_format.py: use tuples instead of lists for fields

[Eric Blake <eblake@redhat.com>]

From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

No need in lists: it's a constant variable.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com>
Message-Id: <20200606081806.23897-6-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 tests/qemu-iotests/qcow2_format.py | 40 +++++++++++++++---------------
 1 file changed, 20 insertions(+), 20 deletions(-)

diff --git a/tests/qemu-iotests/qcow2_format.py b/tests/qemu-iotests/qcow2_format.py
index 2b6c9612ae01..e2f08ed69194 100644
--- a/tests/qemu-iotests/qcow2_format.py
+++ b/tests/qemu-iotests/qcow2_format.py
@@ -39,29 +39,29 @@ class QcowHeader:
     uint32_t = 'I'
     uint64_t = 'Q'

-    fields = [
+    fields = (
         # Version 2 header fields
-        [uint32_t, '%#x',  'magic'],
-        [uint32_t, '%d',   'version'],
-        [uint64_t, '%#x',  'backing_file_offset'],
-        [uint32_t, '%#x',  'backing_file_size'],
-        [uint32_t, '%d',   'cluster_bits'],
-        [uint64_t, '%d',   'size'],
-        [uint32_t, '%d',   'crypt_method'],
-        [uint32_t, '%d',   'l1_size'],
-        [uint64_t, '%#x',  'l1_table_offset'],
-        [uint64_t, '%#x',  'refcount_table_offset'],
-        [uint32_t, '%d',   'refcount_table_clusters'],
-        [uint32_t, '%d',   'nb_snapshots'],
-        [uint64_t, '%#x',  'snapshot_offset'],
+        (uint32_t, '%#x',  'magic'),
+        (uint32_t, '%d',   'version'),
+        (uint64_t, '%#x',  'backing_file_offset'),
+        (uint32_t, '%#x',  'backing_file_size'),
+        (uint32_t, '%d',   'cluster_bits'),
+        (uint64_t, '%d',   'size'),
+        (uint32_t, '%d',   'crypt_method'),
+        (uint32_t, '%d',   'l1_size'),
+        (uint64_t, '%#x',  'l1_table_offset'),
+        (uint64_t, '%#x',  'refcount_table_offset'),
+        (uint32_t, '%d',   'refcount_table_clusters'),
+        (uint32_t, '%d',   'nb_snapshots'),
+        (uint64_t, '%#x',  'snapshot_offset'),

         # Version 3 header fields
-        [uint64_t, 'mask', 'incompatible_features'],
-        [uint64_t, 'mask', 'compatible_features'],
-        [uint64_t, 'mask', 'autoclear_features'],
-        [uint32_t, '%d',   'refcount_order'],
-        [uint32_t, '%d',   'header_length'],
-    ]
+        (uint64_t, 'mask', 'incompatible_features'),
+        (uint64_t, 'mask', 'compatible_features'),
+        (uint64_t, 'mask', 'autoclear_features'),
+        (uint32_t, '%d',   'refcount_order'),
+        (uint32_t, '%d',   'header_length'),
+    )

     fmt = '>' + ''.join(field[0] for field in fields)

-- 
2.27.0