Use new type annotation features from python 3.9

khard/actions.py

@@ -1,14 +1,16 @@
 """Names and aliases for the subcommands on the command line"""
 
-from typing import Dict, Generator, Iterable, List, Optional
+from __future__ import annotations
+
+from typing import Generator, Iterable
 
 
 class Actions:
 
     """A class to manage the names and aliases of the command line
     subcommands."""
 
-    action_map: Dict[str, List[str]] = {
+    action_map: dict[str, list[str]] = {
         "add-email":    [],
         "addressbooks": ["abooks"],
         "birthdays":    ["bdays"],
@@ -28,7 +30,7 @@ class Actions:
     }
 
     @classmethod
-    def get_action(cls, alias: str) -> Optional[str]:
+    def get_action(cls, alias: str) -> None | str:
         """Find the name of the action for the supplied alias.  If no action is
         associated with the given alias, None is returned.
 
@@ -42,7 +44,7 @@ def get_action(cls, alias: str) -> Optional[str]:
         return None
 
     @classmethod
-    def get_aliases(cls, action: str) -> List[str]:
+    def get_aliases(cls, action: str) -> list[str]:
         """Find all aliases for the given action.  If there is no such action,
         None is returned.
 

khard/address_book.py

@@ -1,12 +1,14 @@
 """A simple class to load and manage the vcard files from disk."""
 
+from __future__ import annotations
+
 import abc
 import binascii
 from collections.abc import Mapping, Sequence
 import glob
 import logging
 import os
-from typing import Dict, Generator, Iterator, List, Optional, Union, overload
+from typing import Generator, Iterator, overload
 
 import vobject.base
 
@@ -42,9 +44,8 @@ class AddressBook(metaclass=abc.ABCMeta):
     def __init__(self, name: str) -> None:
         """:param name: the name to identify the address book"""
         self._loaded = False
-        self.contacts: Dict[str, "carddav_object.CarddavObject"] = {}
-        self._short_uids: Optional[Dict[str,
-                                        "carddav_object.CarddavObject"]] = None
+        self.contacts: dict[str, "carddav_object.CarddavObject"] = {}
+        self._short_uids: None | dict[str, "carddav_object.CarddavObject"] = None
         self.name = name
 
     def __str__(self) -> str:
@@ -83,7 +84,7 @@ def search(self, query: Query) -> Generator["carddav_object.CarddavObject",
             if query.match(contact):
                 yield contact
 
-    def get_short_uid_dict(self, query: Query = AnyQuery()) -> Dict[
+    def get_short_uid_dict(self, query: Query = AnyQuery()) -> dict[
             str, "carddav_object.CarddavObject"]:
         """Create a dictionary of shortened UIDs for all contacts.
 
@@ -154,7 +155,7 @@ class VdirAddressBook(AddressBook):
     """
 
     def __init__(self, name: str, path: str,
-                 private_objects: Optional[List[str]] = None,
+                 private_objects: None | list[str] = None,
                  localize_dates: bool = True, skip: bool = False) -> None:
         """
         :param name: the name to identify the address book
@@ -236,7 +237,7 @@ class AddressBookCollection(AddressBook, Mapping, Sequence):
     this class to use all other methods from the parent AddressBook class.
     """
 
-    def __init__(self, name: str, abooks: List[VdirAddressBook]) -> None:
+    def __init__(self, name: str, abooks: list[VdirAddressBook]) -> None:
         """
         :param name: the name to identify the address book
         :param abooks: a list of address books to combine in this collection
@@ -270,11 +271,11 @@ def load(self, query: Query = AnyQuery()) -> None:
                      len(self.contacts), self.name)
 
     @overload
-    def __getitem__(self, key: Union[int, str]) -> VdirAddressBook: ...
+    def __getitem__(self, key: int | str) -> VdirAddressBook: ...
     @overload
-    def __getitem__(self, key: slice) -> List[VdirAddressBook]: ...
-    def __getitem__(self, key: Union[int, str, slice]
-                    ) -> Union[VdirAddressBook, List[VdirAddressBook]]:
+    def __getitem__(self, key: slice) -> list[VdirAddressBook]: ...
+    def __getitem__(self, key: int | str | slice
+                    ) -> VdirAddressBook | list[VdirAddressBook]:
         """Get one or more of the backing address books by name or index
 
         :param key: the name of the address book to get or its index