Fixes for collections.Counter (pytorch#159368)

Pull Request resolved: pytorch#159368
Approved by: https://github.com/mlazos
ghstack dependencies: pytorch#159365, pytorch#159366

Author: guilhermeleobas

test/dynamo_expected_failures/CPython313-test_collections-TestCounter.test_eq

@@ -24,6 +24,7 @@
     # See also the POLYFILLED_MODULE_NAMES in torch/_dynamo/polyfills/loader.py
     # Put the submodules here to avoid circular imports
     from . import (
+        _collections as _collections,
         builtins as builtins,
         functools as functools,
         itertools as itertools,

test/dynamo_expected_failures/CPython313-test_collections-TestCounter.test_ge

@@ -0,0 +1,33 @@
+"""
+Python polyfills for builtins
+"""
+
+from collections.abc import Iterable, MutableMapping
+from typing import TypeVar
+
+from ..decorators import substitute_in_graph
+
+
+__all__ = []
+
+
+T = TypeVar("T")
+
+
+try:
+    import _collections  # type: ignore[import-not-found]
+
+    @substitute_in_graph(_collections._count_elements)
+    def _count_elements(
+        mapping: MutableMapping[T, int],
+        iterable: Iterable[T],
+    ) -> None:
+        "Tally elements from the iterable."
+        mapping_get = mapping.get
+        for elem in iterable:
+            mapping[elem] = mapping_get(elem, 0) + 1
+
+    __all__.append("_count_elements")
+
+except ImportError:
+    pass

test/dynamo_expected_failures/CPython313-test_collections-TestCounter.test_gt

@@ -13,6 +13,7 @@
 
 # See also the TYPE_CHECKING block in torch/_dynamo/polyfills/__init__.py
 POLYFILLED_MODULE_NAMES: tuple[str, ...] = (
+    "_collections",
     "builtins",
     "functools",
     "itertools",