diff --git a/16_tensorboard.py b/16_tensorboard.py
index 0bd67dc6..ba2045cd 100644
--- a/16_tensorboard.py
+++ b/16_tensorboard.py
@@ -43,7 +43,7 @@
                                           shuffle=False)
 
 examples = iter(test_loader)
-example_data, example_targets = examples.next()
+example_data, example_targets = next(examples) # previously `examples.next()`
 
 for i in range(6):
     plt.subplot(2,3,i+1)
@@ -156,4 +156,4 @@ def forward(self, x):
         preds_i = class_preds[:, i]
         writer.add_pr_curve(str(i), labels_i, preds_i, global_step=0)
         writer.close()
-    ###################################################
\ No newline at end of file
+    ###################################################