Use explicit typevars to have 3.11 compatibility

src/parliamentarch/_util.py

@@ -1,7 +1,7 @@
 from collections.abc import Callable, Container, Sequence
 from inspect import Parameter, signature
 from io import TextIOBase
-from typing import NamedTuple
+from typing import NamedTuple, TypeVar
 
 class FactoryDict(dict):
     def __init__(self, default_factory, *args, **kwargs):
@@ -59,7 +59,8 @@ def write_func(file, /, *args, **kwargs):
     write_func.__name__ = get_func.__name__.replace("get_", "write_")
     return write_func
 
-def filter_kwargs[V](
+V = TypeVar("V") # PY3.11 compat
+def filter_kwargs(
         *sets: Container[str],
         **kwargs: V,
         ) -> list[dict[str, V]]:

src/parliamentarch/svg.py

@@ -1,6 +1,7 @@
 from collections.abc import Iterable
 from functools import cached_property
 import re
+from typing import TypeVar
 import warnings
 
 from ._util import Color, UnPicklable, write_from_get
@@ -38,7 +39,8 @@ def accepted_color(c):
         self.border_size = border_size
         self.border_color = accepted_color(border_color)
 
-def dispatch_seats[S](
+S = TypeVar("S") # PY3.11 compat
+def dispatch_seats(
         group_seats: dict[SeatData, int],
         seats: Iterable[S],
         ) -> dict[SeatData, list[S]]: