update DrugBank retrieval

app.py

@@ -214,7 +214,7 @@ def retrieval():
                 lookup = pickle.load(handle)
             drug_id = np.concatenate(smiles)
             structure = [lookup[i] for i in drug_id]
-            results = pd.DataFrame({'SMILES': np.concatenate(structure), 'DrugBank ID': drug_id, 'Prediction': np.concatenate(preds)})
+            results = pd.DataFrame({'SMILES': structure, 'DrugBank ID': drug_id, 'Prediction': np.concatenate(preds)})
         results = results.sort_values(by='Prediction', ascending=False)
         results = results.reset_index()