diff --git a/behavior_tree/main.py b/behavior_tree/main.py
index f049ca9..fe33fcf 100644
--- a/behavior_tree/main.py
+++ b/behavior_tree/main.py
@@ -1,6 +1,7 @@
 import py_trees
 from behavior_library import *
 
+
 def LoadMainTree() -> py_trees.trees.BehaviourTree:
     """
         此方法用于加载固定的顶层行为树（不包括实际执行）
@@ -9,25 +10,25 @@ def LoadMainTree() -> py_trees.trees.BehaviourTree:
     """
 
     seq_subtree_0 = py_trees.composites.Sequence(
-        name='seq_subtree_0', 
-        memory=False, 
+        name='seq_subtree_0',
+        memory=False,
         children=[IsChatting(), Chatting()]
     )
 
     seq_subtree_1 = py_trees.composites.Sequence(
-        name='seq_subtree_1', 
-        memory=False, 
+        name='seq_subtree_1',
+        memory=False,
         children=[IsTakingAction(), TakingAction()]
     )
 
     seq_subtree_2 = py_trees.composites.Sequence(
-        name='seq_subtree_2', 
-        memory=False, 
+        name='seq_subtree_2',
+        memory=False,
         children=[IsSomethingMore(), TakingMoreAction()]
     )
 
     root = py_trees.composites.Selector(
-        name='selector_root', 
+        name='selector_root',
         memory=False,
         children=[seq_subtree_0, seq_subtree_1, seq_subtree_2]
     )
@@ -50,9 +51,11 @@ if '__name__' == '__main__':
     btree = LoadMainTree()
     print('jjjj')
 
+
     def print_tree(tree):
         print(py_trees.display.unicode_tree(root=tree.root, show_status=True))
 
+
     try:
         btree.tick_tock(
             period_ms=500,