chore(internal): ban usage of lru_cache (#464)

pyproject.toml

@@ -163,7 +163,9 @@ select = [
   "T201",
   "T203",
   # misuse of typing.TYPE_CHECKING
-  "TCH004"
+  "TCH004",
+  # import rules
+  "TID251",
 ]
 ignore = [
   # mutable defaults
@@ -179,6 +181,9 @@ ignore-init-module-imports = true
 [tool.ruff.format]
 docstring-code-format = true
 
+[tool.ruff.lint.flake8-tidy-imports.banned-api]
+"functools.lru_cache".msg = "This function does not retain type information for the wrapped function's arguments; The `lru_cache` function from `_utils` should be used instead"
+
 [tool.ruff.lint.isort]
 length-sort = true
 length-sort-straight = true

src/anthropic/_base_client.py

@@ -29,7 +29,6 @@
     cast,
     overload,
 )
-from functools import lru_cache
 from typing_extensions import Literal, override, get_origin
 
 import anyio
@@ -61,7 +60,7 @@
     RequestOptions,
     ModelBuilderProtocol,
 )
-from ._utils import is_dict, is_list, is_given, is_mapping
+from ._utils import is_dict, is_list, is_given, lru_cache, is_mapping
 from ._compat import model_copy, model_dump
 from ._models import GenericModel, FinalRequestOptions, validate_type, construct_type
 from ._response import (

src/anthropic/_models.py

@@ -4,7 +4,6 @@
 import inspect
 from typing import TYPE_CHECKING, Any, Type, Union, Generic, TypeVar, Callable, cast
 from datetime import date, datetime
-from functools import lru_cache
 from typing_extensions import (
     Unpack,
     Literal,
@@ -37,6 +36,7 @@
     PropertyInfo,
     is_list,
     is_given,
+    lru_cache,
     is_mapping,
     parse_date,
     coerce_boolean,

src/anthropic/_utils/_utils.py

@@ -395,5 +395,7 @@ def lru_cache(*, maxsize: int | None = 128) -> Callable[[CallableT], CallableT]:
     """A version of functools.lru_cache that retains the type signature
     for the wrapped function arguments.
     """
-    wrapper = functools.lru_cache(maxsize=maxsize)
+    wrapper = functools.lru_cache(  # noqa: TID251
+        maxsize=maxsize,
+    )
     return cast(Any, wrapper)  # type: ignore[no-any-return]

src/anthropic/lib/bedrock/_stream_decoder.py

@@ -1,8 +1,8 @@
 from __future__ import annotations
 
 from typing import TYPE_CHECKING, Iterator, AsyncIterator
-from functools import lru_cache
 
+from ..._utils import lru_cache
 from ..._streaming import ServerSentEvent
 
 if TYPE_CHECKING: