style(core): drop python 39 linting target for 3.10 (#33286)

Author: mdrxy

libs/core/langchain_core/_api/beta_decorator.py

@@ -14,8 +14,8 @@
 import functools
 import inspect
 import warnings
-from collections.abc import Generator
-from typing import Any, Callable, TypeVar, Union, cast
+from collections.abc import Callable, Generator
+from typing import Any, TypeVar, cast
 
 from langchain_core._api.internal import is_caller_internal
 
@@ -27,7 +27,7 @@ class LangChainBetaWarning(DeprecationWarning):
 # PUBLIC API
 
 
-T = TypeVar("T", bound=Union[Callable[..., Any], type])
+T = TypeVar("T", bound=Callable[..., Any] | type)
 
 
 def beta(

libs/core/langchain_core/_api/deprecation.py

@@ -14,13 +14,11 @@
 import functools
 import inspect
 import warnings
-from collections.abc import Generator
+from collections.abc import Callable, Generator
 from typing import (
     Any,
-    Callable,
     ParamSpec,
     TypeVar,
-    Union,
     cast,
 )
 
@@ -42,7 +40,7 @@ class LangChainPendingDeprecationWarning(PendingDeprecationWarning):
 
 
 # Last Any should be FieldInfoV1 but this leads to circular imports
-T = TypeVar("T", bound=Union[type, Callable[..., Any], Any])
+T = TypeVar("T", bound=type | Callable[..., Any] | Any)
 
 
 def _validate_deprecation_params(
@@ -276,27 +274,25 @@ def finalize(wrapper: Callable[..., Any], new_doc: str) -> T:  # noqa: ARG001
             if not _obj_type:
                 _obj_type = "attribute"
             wrapped = None
-            _name = _name or cast("Union[type, Callable]", obj.fget).__qualname__
+            _name = _name or cast("type | Callable", obj.fget).__qualname__
             old_doc = obj.__doc__
 
             class _DeprecatedProperty(property):
                 """A deprecated property."""
 
                 def __init__(
                     self,
-                    fget: Union[Callable[[Any], Any], None] = None,
-                    fset: Union[Callable[[Any, Any], None], None] = None,
-                    fdel: Union[Callable[[Any], None], None] = None,
-                    doc: Union[str, None] = None,
+                    fget: Callable[[Any], Any] | None = None,
+                    fset: Callable[[Any, Any], None] | None = None,
+                    fdel: Callable[[Any], None] | None = None,
+                    doc: str | None = None,
                 ) -> None:
                     super().__init__(fget, fset, fdel, doc)
                     self.__orig_fget = fget
                     self.__orig_fset = fset
                     self.__orig_fdel = fdel
 
-                def __get__(
-                    self, instance: Any, owner: Union[type, None] = None
-                ) -> Any:
+                def __get__(self, instance: Any, owner: type | None = None) -> Any:
                     if instance is not None or owner is not None:
                         emit_warning()
                     if self.fget is None:
@@ -315,7 +311,7 @@ def __delete__(self, instance: Any) -> None:
                     if self.fdel is not None:
                         self.fdel(instance)
 
-                def __set_name__(self, owner: Union[type, None], set_name: str) -> None:
+                def __set_name__(self, owner: type | None, set_name: str) -> None:
                     nonlocal _name
                     if _name == "<lambda>":
                         _name = set_name
@@ -330,7 +326,7 @@ def finalize(wrapper: Callable[..., Any], new_doc: str) -> T:  # noqa: ARG001
                 )
 
         else:
-            _name = _name or cast("Union[type, Callable]", obj).__qualname__
+            _name = _name or cast("type | Callable", obj).__qualname__
             if not _obj_type:
                 # edge case: when a function is within another function
                 # within a test, this will call it a "method" not a "function"

libs/core/langchain_core/_api/path.py

@@ -1,6 +1,5 @@
 import os
 from pathlib import Path
-from typing import Optional, Union
 
 HERE = Path(__file__).parent
 
@@ -9,9 +8,7 @@
 SEPARATOR = os.sep
 
 
-def get_relative_path(
-    file: Union[Path, str], *, relative_to: Path = PACKAGE_DIR
-) -> str:
+def get_relative_path(file: Path | str, *, relative_to: Path = PACKAGE_DIR) -> str:
     """Get the path of the file as a relative path to the package directory.
 
     Args:
@@ -27,9 +24,9 @@ def get_relative_path(
 
 
 def as_import_path(
-    file: Union[Path, str],
+    file: Path | str,
     *,
-    suffix: Optional[str] = None,
+    suffix: str | None = None,
     relative_to: Path = PACKAGE_DIR,
 ) -> str:
     """Path of the file as a LangChain import exclude langchain top namespace.

libs/core/langchain_core/_import_utils.py

@@ -1,11 +1,10 @@
 from importlib import import_module
-from typing import Union
 
 
 def import_attr(
     attr_name: str,
-    module_name: Union[str, None],
-    package: Union[str, None],
+    module_name: str | None,
+    package: str | None,
 ) -> object:
     """Import an attribute from a module located in a package.
 

libs/core/langchain_core/agents.py

@@ -29,7 +29,7 @@
 
 import json
 from collections.abc import Sequence
-from typing import Any, Literal, Union
+from typing import Any, Literal
 
 from langchain_core.load.serializable import Serializable
 from langchain_core.messages import (
@@ -49,7 +49,7 @@ class AgentAction(Serializable):
 
     tool: str
     """The name of the Tool to execute."""
-    tool_input: Union[str, dict]
+    tool_input: str | dict
     """The input to pass in to the Tool."""
     log: str
     """Additional information to log about the action.
@@ -62,9 +62,7 @@ class AgentAction(Serializable):
     type: Literal["AgentAction"] = "AgentAction"
 
     # Override init to support instantiation by position for backward compat.
-    def __init__(
-        self, tool: str, tool_input: Union[str, dict], log: str, **kwargs: Any
-    ):
+    def __init__(self, tool: str, tool_input: str | dict, log: str, **kwargs: Any):
         """Create an AgentAction.
 
         Args:

libs/core/langchain_core/caches.py

@@ -25,7 +25,7 @@
 
 from abc import ABC, abstractmethod
 from collections.abc import Sequence
-from typing import Any, Optional
+from typing import Any
 
 from typing_extensions import override
 
@@ -52,7 +52,7 @@ class BaseCache(ABC):
     """
 
     @abstractmethod
-    def lookup(self, prompt: str, llm_string: str) -> Optional[RETURN_VAL_TYPE]:
+    def lookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
         """Look up based on prompt and llm_string.
 
         A cache implementation is expected to generate a key from the 2-tuple
@@ -97,7 +97,7 @@ def update(self, prompt: str, llm_string: str, return_val: RETURN_VAL_TYPE) -> N
     def clear(self, **kwargs: Any) -> None:
         """Clear cache that can take additional keyword arguments."""
 
-    async def alookup(self, prompt: str, llm_string: str) -> Optional[RETURN_VAL_TYPE]:
+    async def alookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
         """Async look up based on prompt and llm_string.
 
         A cache implementation is expected to generate a key from the 2-tuple
@@ -149,7 +149,7 @@ async def aclear(self, **kwargs: Any) -> None:
 class InMemoryCache(BaseCache):
     """Cache that stores things in memory."""
 
-    def __init__(self, *, maxsize: Optional[int] = None) -> None:
+    def __init__(self, *, maxsize: int | None = None) -> None:
         """Initialize with empty cache.
 
         Args:
@@ -167,7 +167,7 @@ def __init__(self, *, maxsize: Optional[int] = None) -> None:
             raise ValueError(msg)
         self._maxsize = maxsize
 
-    def lookup(self, prompt: str, llm_string: str) -> Optional[RETURN_VAL_TYPE]:
+    def lookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
         """Look up based on prompt and llm_string.
 
         Args:
@@ -201,7 +201,7 @@ def clear(self, **kwargs: Any) -> None:
         """Clear cache."""
         self._cache = {}
 
-    async def alookup(self, prompt: str, llm_string: str) -> Optional[RETURN_VAL_TYPE]:
+    async def alookup(self, prompt: str, llm_string: str) -> RETURN_VAL_TYPE | None:
         """Async look up based on prompt and llm_string.
 
         Args: