diff --git a/utils/graph.py b/utils/graph.py
deleted file mode 100644
index 7e32fa6..0000000
--- a/utils/graph.py
+++ /dev/null
@@ -1,25 +0,0 @@
-# 为我们的程序量身定做的数据结构
-class Graph:
-    """
-    指定节点数量
-    源节点集，目标节点集
-    有向图，无向图
-    生成子图
-    """
-    def __init__(self):
-        '''
-        :param num_nodes: 总节点数
-        :param edges: 边：[nums_edges,2]
-        '''
-        pass
-    def add_edge(self):
-        pass
-    def set_src_nodes(self,src_nodes):
-        pass
-    def set_tgt_nodes(self,tgt_nodes):
-        pass
-    def get_tgt_nodes(self):
-        return
-    def get_edges_dir(self):
-        pass
-