From 9c7ef872a7b84b60e74b5a6c333a6e00e808ee70 Mon Sep 17 00:00:00 2001
From: awan <32409620+awanawana@users.noreply.github.com>
Date: Wed, 18 Mar 2026 17:17:28 +0800
Subject: [PATCH] Fix deprecated df.append() and missing test prefix
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- Replace deprecated df.append() with efficient list-based approach (O(n) vs O(n²))
- Fix missing test_ prefix in test_datasets.py to enable the test

Signed-off-by: awanawana <awanawana@users.noreply.github.com>