fix up some C signatures (#14624)

a few issues exposed after https://github.com/python/mypy/pull/18259 was merged

stdlib/random.pyi

@@ -4,6 +4,7 @@ from _typeshed import SupportsLenAndGetItem
 from collections.abc import Callable, Iterable, MutableSequence, Sequence, Set as AbstractSet
 from fractions import Fraction
 from typing import Any, ClassVar, NoReturn, TypeVar
+from typing_extensions import Self
 
 __all__ = [
     "Random",
@@ -44,6 +45,10 @@ class Random(_random.Random):
     # Using other `seed` types is deprecated since 3.9 and removed in 3.11
     # Ignore Y041, since random.seed doesn't treat int like a float subtype. Having an explicit
     # int better documents conventional usage of random.seed.
+    if sys.version_info < (3, 10):
+        # this is a workaround for pyright correctly flagging an inconsistent inherited constructor, see #14624
+        def __new__(cls, x: int | float | str | bytes | bytearray | None = None) -> Self: ...  # noqa: Y041
+
     def seed(self, a: int | float | str | bytes | bytearray | None = None, version: int = 2) -> None: ...  # type: ignore[override]  # noqa: Y041
     def getstate(self) -> tuple[Any, ...]: ...
     def setstate(self, state: tuple[Any, ...]) -> None: ...