Use TypeAlias where possible for type aliases (#7630)

stubs/pysftp/pysftp/__init__.pyi

@@ -3,7 +3,7 @@ from contextlib import AbstractContextManager
 from stat import S_IMODE as S_IMODE
 from types import TracebackType
 from typing import IO, Any, Callable, Sequence
-from typing_extensions import Literal
+from typing_extensions import Literal, TypeAlias
 
 import paramiko
 from paramiko import AuthenticationException as AuthenticationException
@@ -32,8 +32,8 @@ class CnOpts:
     def __init__(self, knownhosts: str | None = ...) -> None: ...
     def get_hostkey(self, host: str) -> paramiko.PKey: ...
 
-_Callback = Callable[[int, int], Any]
-_Path = str | bytes
+_Callback: TypeAlias = Callable[[int, int], Any]
+_Path: TypeAlias = str | bytes
 
 class Connection:
     def __init__(

stubs/pysftp/pysftp/helpers.pyi

@@ -1,5 +1,6 @@
 from collections.abc import Callable, Iterator
 from contextlib import AbstractContextManager
+from typing_extensions import TypeAlias
 
 def known_hosts() -> str: ...
 def st_mode_to_int(val: int) -> int: ...
@@ -26,7 +27,7 @@ def path_advance(thepath: str, sep: str = ...) -> Iterator[str]: ...
 def path_retreat(thepath: str, sep: str = ...) -> Iterator[str]: ...
 def reparent(newparent: str, oldpath: str) -> str: ...
 
-_PathCallback = Callable[[str], None]
+_PathCallback: TypeAlias = Callable[[str], None]
 
 def walktree(
     localpath: str, fcallback: _PathCallback, dcallback: _PathCallback, ucallback: _PathCallback, recurse: bool = ...