retain type of _modules when renaming keys

CHANGELOG.md

@@ -27,7 +27,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
--
+- Changing `_modules` dict type in Pytorch 2.5 preventing to fail collections metrics ([#2793](https://github.com/Lightning-AI/torchmetrics/pull/2793))
 
 
 ---

src/torchmetrics/collections.py

@@ -14,7 +14,7 @@
 # this is just a bypass for this module name collision with built-in one
 from collections import OrderedDict
 from copy import deepcopy
-from typing import Any, Dict, Hashable, Iterable, Iterator, List, Optional, Sequence, Tuple, Union
+from typing import Any, Dict, Hashable, Iterable, Iterator, List, Mapping, Optional, Sequence, Tuple, Union
 
 import torch
 from torch import Tensor
@@ -499,11 +499,12 @@ def _set_name(self, base: str) -> str:
         name = base if self.prefix is None else self.prefix + base
         return name if self.postfix is None else name + self.postfix
 
-    def _to_renamed_ordered_dict(self) -> OrderedDict:
-        od = OrderedDict()
+    def _to_renamed_dict(self) -> Mapping[str, Metric]:
+        # self._modules changed from OrderedDict to dict as of PyTorch 2.5.0
+        dict_modules = OrderedDict() if isinstance(self._modules, OrderedDict) else {}
         for k, v in self._modules.items():
-            od[self._set_name(k)] = v
-        return od
+            dict_modules[self._set_name(k)] = v
+        return dict_modules
 
     def __iter__(self) -> Iterator[Hashable]:
         """Return an iterator over the keys of the MetricDict."""
@@ -519,7 +520,7 @@ def keys(self, keep_base: bool = False) -> Iterable[Hashable]:
         """
         if keep_base:
             return self._modules.keys()
-        return self._to_renamed_ordered_dict().keys()
+        return self._to_renamed_dict().keys()
 
     def items(self, keep_base: bool = False, copy_state: bool = True) -> Iterable[Tuple[str, Metric]]:
         r"""Return an iterable of the ModuleDict key/value pairs.
@@ -533,7 +534,7 @@ def items(self, keep_base: bool = False, copy_state: bool = True) -> Iterable[Tu
         self._compute_groups_create_state_ref(copy_state)
         if keep_base:
             return self._modules.items()
-        return self._to_renamed_ordered_dict().items()
+        return self._to_renamed_dict().items()
 
     def values(self, copy_state: bool = True) -> Iterable[Metric]:
         """Return an iterable of the ModuleDict values.

src/torchmetrics/utilities/imports.py

@@ -21,6 +21,7 @@
 _PYTHON_VERSION = f"{sys.version_info.major}.{sys.version_info.minor}.{sys.version_info.micro}"
 _TORCH_GREATER_EQUAL_2_1 = RequirementCache("torch>=2.1.0")
 _TORCH_GREATER_EQUAL_2_2 = RequirementCache("torch>=2.2.0")
+_TORCH_GREATER_EQUAL_2_5 = RequirementCache("torch>=2.5.0")
 _TORCHMETRICS_GREATER_EQUAL_1_6 = RequirementCache("torchmetrics>=1.7.0")
 
 _NLTK_AVAILABLE = RequirementCache("nltk")

tests/unittests/wrappers/test_multitask.py

@@ -19,6 +19,7 @@
 from torchmetrics import MetricCollection
 from torchmetrics.classification import BinaryAccuracy, BinaryF1Score
 from torchmetrics.regression import MeanAbsoluteError, MeanSquaredError
+from torchmetrics.utilities.imports import _TORCH_GREATER_EQUAL_2_5
 from torchmetrics.wrappers import MultitaskWrapper
 
 from unittests import BATCH_SIZE, NUM_BATCHES
@@ -90,33 +91,37 @@ def test_error_on_wrong_keys():
         "Classification": BinaryAccuracy(),
     })
 
+    order_dict = "" if _TORCH_GREATER_EQUAL_2_5 else "o"
+
     with pytest.raises(
         ValueError,
         match=re.escape(
-            "Expected arguments `task_preds` and `task_targets` to have the same keys as the wrapped `task_metrics`. "
-            "Found task_preds.keys() = dict_keys(['Classification']), task_targets.keys() = "
-            "dict_keys(['Classification', 'Regression']) and self.task_metrics.keys() = "
-            "odict_keys(['Classification', 'Regression'])"
+            "Expected arguments `task_preds` and `task_targets` to have the same keys as the wrapped `task_metrics`."
+            " Found task_preds.keys() = dict_keys(['Classification']),"
+            " task_targets.keys() = dict_keys(['Classification', 'Regression'])"
+            f" and self.task_metrics.keys() = {order_dict}dict_keys(['Classification', 'Regression'])"
         ),
     ):
         multitask_metrics.update(wrong_key_preds, _multitask_targets)
 
     with pytest.raises(
         ValueError,
         match=re.escape(
-            "Expected arguments `task_preds` and `task_targets` to have the same keys as the wrapped `task_metrics`. "
-            "Found task_preds.keys() = dict_keys(['Classification', 'Regression']), task_targets.keys() = "
-            "dict_keys(['Classification']) and self.task_metrics.keys() = odict_keys(['Classification', 'Regression'])"
+            "Expected arguments `task_preds` and `task_targets` to have the same keys as the wrapped `task_metrics`."
+            " Found task_preds.keys() = dict_keys(['Classification', 'Regression']),"
+            " task_targets.keys() = dict_keys(['Classification'])"
+            f" and self.task_metrics.keys() = {order_dict}dict_keys(['Classification', 'Regression'])"
         ),
     ):
         multitask_metrics.update(_multitask_preds, wrong_key_targets)
 
     with pytest.raises(
         ValueError,
         match=re.escape(
-            "Expected arguments `task_preds` and `task_targets` to have the same keys as the wrapped `task_metrics`. "
-            "Found task_preds.keys() = dict_keys(['Classification', 'Regression']), task_targets.keys() = "
-            "dict_keys(['Classification', 'Regression']) and self.task_metrics.keys() = odict_keys(['Classification'])"
+            "Expected arguments `task_preds` and `task_targets` to have the same keys as the wrapped `task_metrics`."
+            " Found task_preds.keys() = dict_keys(['Classification', 'Regression']),"
+            " task_targets.keys() = dict_keys(['Classification', 'Regression'])"
+            f" and self.task_metrics.keys() = {order_dict}dict_keys(['Classification'])"
         ),
     ):
         wrong_key_multitask_metrics.update(_multitask_preds, _multitask_targets)