Update app.py

app.py

@@ -59,7 +59,7 @@ def stockprice(stockname,number_of_samples):
 
     pred_df.reset_index(inplace=True)
     pred_df = pred_df.rename(columns = {'index':'HOURS'})
-    pred_df.index = np.arange(1, len(pred_df) + 1)
+    pred_df.set_index = np.arange(1, len(pred_df) + 1)
     
     
     plt.figure(figsize=(15, 6))