More permissive type for random.choice and related functions (#6562)

stdlib/random.pyi

@@ -1,5 +1,6 @@
 import _random
 import sys
+from _typeshed import SupportsLenAndGetItem
 from collections.abc import Callable, Iterable, MutableSequence, Sequence
 from fractions import Fraction
 from typing import Any, ClassVar, NoReturn, Tuple, TypeVar
@@ -17,10 +18,10 @@ class Random(_random.Random):
     def randint(self, a: int, b: int) -> int: ...
     if sys.version_info >= (3, 9):
         def randbytes(self, n: int) -> bytes: ...
-    def choice(self, seq: Sequence[_T]) -> _T: ...
+    def choice(self, seq: SupportsLenAndGetItem[_T]) -> _T: ...
     def choices(
         self,
-        population: Sequence[_T],
+        population: SupportsLenAndGetItem[_T],
         weights: Sequence[float | Fraction] | None = ...,
         *,
         cum_weights: Sequence[float | Fraction] | None = ...,
@@ -61,9 +62,13 @@ def randint(a: int, b: int) -> int: ...
 if sys.version_info >= (3, 9):
     def randbytes(n: int) -> bytes: ...
 
-def choice(seq: Sequence[_T]) -> _T: ...
+def choice(seq: SupportsLenAndGetItem[_T]) -> _T: ...
 def choices(
-    population: Sequence[_T], weights: Sequence[float] | None = ..., *, cum_weights: Sequence[float] | None = ..., k: int = ...
+    population: SupportsLenAndGetItem[_T],
+    weights: Sequence[float] | None = ...,
+    *,
+    cum_weights: Sequence[float] | None = ...,
+    k: int = ...,
 ) -> list[_T]: ...
 def shuffle(x: MutableSequence[Any], random: Callable[[], float] | None = ...) -> None: ...
 

stdlib/secrets.pyi

@@ -1,12 +1,13 @@
+from _typeshed import SupportsLenAndGetItem
 from hmac import compare_digest as compare_digest
 from random import SystemRandom as SystemRandom
-from typing import Sequence, TypeVar
+from typing import TypeVar
 
 _T = TypeVar("_T")
 
 def randbelow(exclusive_upper_bound: int) -> int: ...
 def randbits(k: int) -> int: ...
-def choice(seq: Sequence[_T]) -> _T: ...
+def choice(seq: SupportsLenAndGetItem[_T]) -> _T: ...
 def token_bytes(nbytes: int | None = ...) -> bytes: ...
 def token_hex(nbytes: int | None = ...) -> str: ...
 def token_urlsafe(nbytes: int | None = ...) -> str: ...