replace some typing.* constructs with native ones

src/capport/stats.py

@@ -2,7 +2,6 @@ from __future__ import annotations
 
 import ipaddress
 import sys
-import typing
 
 import trio
 
@@ -12,7 +11,7 @@ import capport.utils.nft_set
 from . import cptypes
 
 
-def print_metric(name: str, mtype: str, value, *, now: typing.Optional[int] = None, help: typing.Optional[str] = None):
+def print_metric(name: str, mtype: str, value, *, now: int | None = None, help: str | None = None):
     # no labels in our names for now, always print help and type
     if help:
         print(f'# HELP {name} {help}')
@@ -25,11 +24,11 @@ def print_metric(name: str, mtype: str, value, *, now: typing.Optional[int] = No
 
 async def amain(client_ifname: str):
     ns = capport.utils.nft_set.NftSet()
-    captive_allowed_entries: typing.Set[cptypes.MacAddress] = {
+    captive_allowed_entries: set[cptypes.MacAddress] = {
         entry['mac']
         for entry in ns.list()
     }
-    seen_allowed_entries: typing.Set[cptypes.MacAddress] = set()
+    seen_allowed_entries: set[cptypes.MacAddress] = set()
     total_ipv4 = 0
     total_ipv6 = 0
     unique_clients = set()