fix dcp pyre errors (#832)

Summary:
Pull Request resolved: #832

Fixes pyre error in dcp tests

Also moves latest pytorch check to the top, otherwise import error is raised on StorageMeta in stable unit tests

Reviewed By: diego-urgell

Differential Revision: D57342263

fbshipit-source-id: 79d66a5637313eb399d995158baa0ae5c1821d27

Author: JKSenthil

tests/framework/callbacks/test_dcp_saver.py

@@ -7,12 +7,18 @@
 
 # pyre-strict
 
+import unittest
+
+from torchtnt.framework.callbacks.dcp_saver import _LATEST_DCP_AVAIL
+
+if not _LATEST_DCP_AVAIL:
+    raise unittest.SkipTest("Latest Pytorch is required to run DCP tests")
+
 import math
 import os
 import shutil
 import tempfile
-import unittest
-from typing import Any, Dict, Iterator, List
+from typing import Any, Dict, Iterator, List, Optional
 from unittest import mock
 from unittest.mock import MagicMock, patch
 
@@ -23,7 +29,7 @@
     DefaultLoadPlanner,
     DefaultSavePlanner,
 )
-from torch.distributed.checkpoint.metadata import Metadata, STATE_DICT_TYPE
+from torch.distributed.checkpoint.metadata import Metadata, STATE_DICT_TYPE, StorageMeta
 from torch.utils.data import DataLoader
 from torchsnapshot.test_utils import assert_state_dict_eq, check_state_dict_eq
 from torchtnt.framework._test_utils import (
@@ -32,18 +38,12 @@
     generate_random_dataloader,
 )
 from torchtnt.framework.callbacks.checkpointer_types import KnobOptions, RestoreOptions
-from torchtnt.framework.callbacks.dcp_saver import (
-    _LATEST_DCP_AVAIL,
-    DistributedCheckpointSaver,
-)
+from torchtnt.framework.callbacks.dcp_saver import DistributedCheckpointSaver
 from torchtnt.framework.train import train
 from torchtnt.utils.distributed import get_global_rank, spawn_multi_process
 from torchtnt.utils.env import seed
 from torchtnt.utils.test_utils import skip_if_not_distributed
 
-if not _LATEST_DCP_AVAIL:
-    raise unittest.SkipTest("Latest Pytorch is required to run DCP tests")
-
 
 class DistributedCheckpointSaverTest(unittest.TestCase):
     def test_save_restore(self) -> None:
@@ -410,8 +410,13 @@ class DummySavePlanner(DefaultSavePlanner):
     def __init__(self) -> None:
         super().__init__()
 
-    def set_up_planner(self, state_dict: STATE_DICT_TYPE, is_coordinator: bool) -> None:
-        super().set_up_planner(state_dict, is_coordinator)
+    def set_up_planner(
+        self,
+        state_dict: STATE_DICT_TYPE,
+        storage_meta: Optional[StorageMeta],
+        is_coordinator: bool,
+    ) -> None:
+        super().set_up_planner(state_dict, storage_meta, is_coordinator)
 
 
 class DummyLoadPlanner(DefaultLoadPlanner):
@@ -421,7 +426,7 @@ def __init__(self) -> None:
     def set_up_planner(
         self,
         state_dict: STATE_DICT_TYPE,
-        metadata: Metadata,
+        metadata: Optional[Metadata],
         is_coordinator: bool,
     ) -> None:
         super().set_up_planner(state_dict, metadata, is_coordinator)