Update app.py

app.py

@@ -1,6 +1,12 @@
 import igraph as ig
 import plotly.graph_objects as go
 
+import gradio as gr
+import plotly.graph_objects as go
+import os
+from collections import defaultdict
+import igraph as ig
+
 # Let's create a list of edges with a binary tree structure up to depth 6
 # A binary tree has a structure where each node has two children, often referred to as left and right child.
 # We will assume that the topmost node (root) has an index 0.