stdlib: fix signatures for some functions with unrepresentable defaults

Found with python/mypy#16433

stdlib/_locale.pyi

@@ -10,7 +10,7 @@ LC_NUMERIC: int
 LC_ALL: int
 CHAR_MAX: int
 
-def setlocale(category: int, locale: str | Iterable[str | None] | None = None) -> str: ...
+def setlocale(__category: int, __locale: str | Iterable[str | None] | None = None) -> str: ...
 def localeconv() -> Mapping[str, int | str | list[int]]: ...
 
 if sys.version_info >= (3, 11):

stdlib/builtins.pyi

@@ -1288,7 +1288,7 @@ if sys.version_info >= (3, 10):
     # See discussion in #7491 and pure-Python implementation of `anext` at https://github.com/python/cpython/blob/ea786a882b9ed4261eafabad6011bc7ef3b5bf94/Lib/test/test_asyncgen.py#L52-L80
     def anext(__i: _SupportsSynchronousAnext[_AwaitableT]) -> _AwaitableT: ...
     @overload
-    async def anext(__i: SupportsAnext[_T], default: _VT) -> _T | _VT: ...
+    async def anext(__i: SupportsAnext[_T], __default: _VT) -> _T | _VT: ...
 
 # compile() returns a CodeType, unless the flags argument includes PyCF_ONLY_AST (=1024),
 # in which case it returns ast.AST. We have overloads for flag 0 (the default) and for

stdlib/cmath.pyi

@@ -30,7 +30,7 @@ def exp(__z: _C) -> complex: ...
 def isclose(a: _C, b: _C, *, rel_tol: SupportsFloat = 1e-09, abs_tol: SupportsFloat = 0.0) -> bool: ...
 def isinf(__z: _C) -> bool: ...
 def isnan(__z: _C) -> bool: ...
-def log(__x: _C, __y_obj: _C = ...) -> complex: ...
+def log(__x: _C, __base: _C = ...) -> complex: ...
 def log10(__z: _C) -> complex: ...
 def phase(__z: _C) -> float: ...
 def polar(__z: _C) -> tuple[float, float]: ...

stdlib/os/__init__.pyi

@@ -970,9 +970,9 @@ else:
     def WTERMSIG(status: int) -> int: ...
     if sys.version_info >= (3, 8):
         def posix_spawn(
-            path: StrOrBytesPath,
-            argv: _ExecVArgs,
-            env: _ExecEnv,
+            __path: StrOrBytesPath,
+            __argv: _ExecVArgs,
+            __env: _ExecEnv,
             *,
             file_actions: Sequence[tuple[Any, ...]] | None = ...,
             setpgroup: int | None = ...,
@@ -983,9 +983,9 @@ else:
             scheduler: tuple[Any, sched_param] | None = ...,
         ) -> int: ...
         def posix_spawnp(
-            path: StrOrBytesPath,
-            argv: _ExecVArgs,
-            env: _ExecEnv,
+            __path: StrOrBytesPath,
+            __argv: _ExecVArgs,
+            __env: _ExecEnv,
             *,
             file_actions: Sequence[tuple[Any, ...]] | None = ...,
             setpgroup: int | None = ...,

stdlib/sqlite3/dbapi2.pyi

@@ -352,7 +352,7 @@ class Connection:
     def cursor(self, cursorClass: None = None) -> Cursor: ...
     @overload
     def cursor(self, cursorClass: Callable[[Connection], _CursorT]) -> _CursorT: ...
-    def execute(self, sql: str, parameters: _Parameters = ...) -> Cursor: ...
+    def execute(self, __sql: str, __parameters: _Parameters = ...) -> Cursor: ...
     def executemany(self, __sql: str, __parameters: Iterable[_Parameters]) -> Cursor: ...
     def executescript(self, __sql_script: str) -> Cursor: ...
     def interrupt(self) -> None: ...