fix writing of view matrix

app.py

@@ -11,7 +11,7 @@ import cellscape
 def predict(input_mol, view_str, chains):
     # write view to file
     with open("view_matrix", "w") as f:
-        f.write(view_str[1:-1])
+        f.write(json.loads(view_str))
 
     chain_str = ""
     chain_dict = json.loads(chains)