fix checkpoint.value in the notebook and test

notebook/tune_pytorch.ipynb

@@ -347,7 +347,11 @@
     "        best_trained_model = nn.DataParallel(best_trained_model)\n",
     "best_trained_model.to(device)\n",
     "\n",
-    "checkpoint_path = os.path.join(best_trial.checkpoint.value, \"checkpoint\")\n",
+    "checkpoint_value = (\n",
+    "    getattr(best_trial.checkpoint, \"dir_or_data\", None)\n",
+    "    or best_trial.checkpoint.value\n",
+    ")\n",
+    "checkpoint_path = os.path.join(checkpoint_value, \"checkpoint\")\n",
     "\n",
     "model_state, optimizer_state = torch.load(checkpoint_path)\n",
     "best_trained_model.load_state_dict(model_state)\n",
@@ -358,11 +362,9 @@
   }
  ],
  "metadata": {
-  "interpreter": {
-   "hash": "f7771e6a3915580179405189f5aa4eb9047494cbe4e005b29b851351b54902f6"
-  },
   "kernelspec": {
-   "display_name": "Python 3.8.10 64-bit ('venv': venv)",
+   "display_name": "Python 3.11.0 64-bit",
+   "language": "python",
    "name": "python3"
   },
   "language_info": {
@@ -375,12 +377,17 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.12"
+   "version": "3.11.0"
   },
   "metadata": {
    "interpreter": {
     "hash": "31f2aee4e71d21fbe5cf8b01ff0e069b9275f58929596ceb00d14d90e3e16cd6"
    }
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "aee8b7b246df8f9039afb4144a1f6fd8d2ca17a180786b69acc140d282b71a49"
+   }
   }
  },
  "nbformat": 4,

test/tune/test_pytorch_cifar10.py

@@ -313,7 +313,11 @@ def cifar10_main(
             best_trained_model = nn.DataParallel(best_trained_model)
     best_trained_model.to(device)
 
-    checkpoint_path = os.path.join(best_trial.checkpoint.value, "checkpoint")
+    checkpoint_value = (
+        getattr(best_trial.checkpoint, "dir_or_data", None)
+        or best_trial.checkpoint.value
+    )
+    checkpoint_path = os.path.join(checkpoint_value, "checkpoint")
 
     model_state, optimizer_state = torch.load(checkpoint_path)
     best_trained_model.load_state_dict(model_state)