From faeb83a0729e3a72b2b2537e957dfa5d3897de7e Mon Sep 17 00:00:00 2001
From: bt3gl <138340846+bt3gl-cryptographer@users.noreply.github.com>
Date: Tue, 8 Aug 2023 13:49:24 -0700
Subject: [PATCH] Update bt_height.py

---
 trees/bt_height.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/trees/bt_height.py b/trees/bt_height.py
index 32fbc7d..b10b178 100644
--- a/trees/bt_height.py
+++ b/trees/bt_height.py
@@ -5,7 +5,7 @@
 
 def height(root):
       
-      if not root:
+      if root is None:
             return 0
             
       return 1 + max(height(root.left), height(root.right))