Update app.py

app.py

@@ -201,9 +201,11 @@ def geometry(index):
     values = forward_net.get_geometry(index)
     return plotly_fig(values)
 
+global forward_net
 forward_net = Network("16forward_structure.json", "16forward_weights.h5")  
 
-def simple_analysis(index):  
+def simple_analysis(index): 
+    global forward_net 
     return forward_net.analysis(index)
 
 def simple_synthesis(index):