Fix the util of array to tree.

2025-07-22 15:53:50 +08:00 · 2022-12-02 00:53:19 +08:00
parent e20bc251f5
commit d85a14521f
3 changed files with 5 additions and 2 deletions
--- a/codes/python/include/binary_tree.py
+++ b/codes/python/include/binary_tree.py
@ -24,7 +24,7 @@ def list_to_tree(arr):
        [type]: [description]
    """
    if not arr:
-        return
+        return None
    i = 1
    root = TreeNode(int(arr[0]))
    queue = collections.deque()