diff --git a/144-binary-tree-preorder-traversal/STATS_py.md b/144-binary-tree-preorder-traversal/STATS_py.md
new file mode 100644
index 0000000..a11a17e
--- /dev/null
+++ b/144-binary-tree-preorder-traversal/STATS_py.md
@@ -0,0 +1 @@
+Time: 32 ms (84.16%), Space: 13.9 MB (56.74%) - LeetHub
\ No newline at end of file