Since Python 3.12 the standard library has included an `os.unshare` function.
Use it if it is available.

Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
---
 tests/py/nft-test.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/tests/py/nft-test.py b/tests/py/nft-test.py
index 53fd3f7ae6fe..64837da36035 100755
--- a/tests/py/nft-test.py
+++ b/tests/py/nft-test.py
@@ -1466,7 +1466,14 @@ def run_test_file(filename, force_all_family_option, specific_file):
     return [tests, passed, total_warning, total_error, total_unit_run]
 
 def spawn_netns():
-    # prefer unshare module
+    # prefer stdlib unshare function ...
+    try:
+        os.unshare(os.CLONE_NEWNET)
+        return True
+    except Exception as e:
+        pass
+
+    # ... or unshare module
     try:
         import unshare
         unshare.unshare(unshare.CLONE_NEWNET)
-- 
2.51.0