From 620e37fd02b2471159baec34715b7d204c9cd4d2 Mon Sep 17 00:00:00 2001
From: chaojie <hi@chaojie.fun>
Date: Mon, 21 Nov 2022 10:22:36 +0800
Subject: [PATCH] Add type-hints for _vformat in string.Formatter (#9228)

---
 stdlib/string.pyi | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/stdlib/string.pyi b/stdlib/string.pyi
index 6fb803fe5..49802ce81 100644
--- a/stdlib/string.pyi
+++ b/stdlib/string.pyi
@@ -64,11 +64,20 @@ class Formatter:
     ) -> LiteralString: ...
     @overload
     def vformat(self, format_string: str, args: Sequence[Any], kwargs: Mapping[str, Any]) -> str: ...
+    def _vformat(  # undocumented
+        self,
+        format_string: str,
+        args: Sequence[Any],
+        kwargs: Mapping[str, Any],
+        used_args: set[int | str],
+        recursion_depth: int,
+        auto_arg_index: int = ...,
+    ) -> tuple[str, int]: ...
     def parse(
         self, format_string: StrOrLiteralStr
     ) -> Iterable[tuple[StrOrLiteralStr, StrOrLiteralStr | None, StrOrLiteralStr | None, StrOrLiteralStr | None]]: ...
     def get_field(self, field_name: str, args: Sequence[Any], kwargs: Mapping[str, Any]) -> Any: ...
     def get_value(self, key: int | str, args: Sequence[Any], kwargs: Mapping[str, Any]) -> Any: ...
-    def check_unused_args(self, used_args: Sequence[int | str], args: Sequence[Any], kwargs: Mapping[str, Any]) -> None: ...
+    def check_unused_args(self, used_args: set[int | str], args: Sequence[Any], kwargs: Mapping[str, Any]) -> None: ...
     def format_field(self, value: Any, format_spec: str) -> Any: ...
     def convert_field(self, value: Any, conversion: str) -> Any: ...