[PATCH] selftests: tc-testing: preserve list order when removing duplicates

From: Naveen Anandhan <redacted>

Using set() removes duplicates but breaks ordering.
Test output should be deterministic, so replace with dict.fromkeys().

Signed-off-by: Naveen Anandhan <redacted>
---
 tools/testing/selftests/tc-testing/tdc_helper.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/tc-testing/tdc_helper.py b/tools/testing/selftests/tc-testing/tdc_helper.py
index 0440d252c4c5..e06f03c0fb5d 100644
--- a/tools/testing/selftests/tc-testing/tdc_helper.py
+++ b/tools/testing/selftests/tc-testing/tdc_helper.py

@@ -16,9 +16,9 @@ def get_categorized_testlist(alltests, ucat):
 
 
 def get_unique_item(lst):
-    """ For a list, return a list of the unique items in the list. """
+    """Return unique items while preserving original order."""
     if len(lst) > 1:
-        return list(set(lst))
+        return list(dict.fromkeys(lst))
     else:
         return lst
 

-- 
2.43.0

Hello:

This patch was applied to netdev/net-next.git (main)
by Paolo Abeni [off-list ref]:

On Sun, 22 Feb 2026 15:25:36 +0530 you wrote:

From: Naveen Anandhan <redacted>

Using set() removes duplicates but breaks ordering.
Test output should be deterministic, so replace with dict.fromkeys().

Signed-off-by: Naveen Anandhan <redacted>

[...]

Here is the summary with links:
  - selftests: tc-testing: preserve list order when removing duplicates
    https://git.kernel.org/netdev/net-next/c/8ac768bb198c

You are awesome, thank you!
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