stdlib: add __slots__ (#14611)

stdlib/ipaddress.pyi

@@ -22,6 +22,7 @@ def ip_interface(
 ) -> IPv4Interface | IPv6Interface: ...
 
 class _IPAddressBase:
+    __slots__ = ()
     @property
     def compressed(self) -> str: ...
     @property
@@ -33,6 +34,7 @@ class _IPAddressBase:
         def version(self) -> int: ...
 
 class _BaseAddress(_IPAddressBase):
+    __slots__ = ()
     def __add__(self, other: int) -> Self: ...
     def __hash__(self) -> int: ...
     def __int__(self) -> int: ...
@@ -105,6 +107,7 @@ class _BaseNetwork(_IPAddressBase, Generic[_A]):
     def hostmask(self) -> _A: ...
 
 class _BaseV4:
+    __slots__ = ()
     if sys.version_info >= (3, 14):
         version: Final = 4
         max_prefixlen: Final = 32
@@ -115,6 +118,7 @@ class _BaseV4:
         def max_prefixlen(self) -> Literal[32]: ...
 
 class IPv4Address(_BaseV4, _BaseAddress):
+    __slots__ = ("_ip", "__weakref__")
     def __init__(self, address: object) -> None: ...
     @property
     def is_global(self) -> bool: ...
@@ -156,6 +160,7 @@ class IPv4Interface(IPv4Address):
     def with_prefixlen(self) -> str: ...
 
 class _BaseV6:
+    __slots__ = ()
     if sys.version_info >= (3, 14):
         version: Final = 6
         max_prefixlen: Final = 128
@@ -166,6 +171,7 @@ class _BaseV6:
         def max_prefixlen(self) -> Literal[128]: ...
 
 class IPv6Address(_BaseV6, _BaseAddress):
+    __slots__ = ("_ip", "_scope_id", "__weakref__")
     def __init__(self, address: object) -> None: ...
     @property
     def is_global(self) -> bool: ...