From 65b8046fe08a19df937068e5fe5ad15f9b0a785a Mon Sep 17 00:00:00 2001
From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Sat, 12 Dec 2020 18:44:37 +0100
Subject: from __future__ import annotations
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Now that our baseline is Python 3.7, we can rely on type annotations to
be lazily evaluated.
---
 poezio/bookmarks.py                  |  2 +-
 poezio/colors.py                     |  2 +-
 poezio/common.py                     |  2 +-
 poezio/config.py                     |  5 ++---
 poezio/contact.py                    | 10 +++++-----
 poezio/core/commands.py              |  2 +-
 poezio/core/completions.py           |  2 +-
 poezio/core/core.py                  |  2 +-
 poezio/core/tabs.py                  | 19 +++++++++----------
 poezio/decorators.py                 |  5 ++++-
 poezio/events.py                     |  2 +-
 poezio/keyboard.py                   |  4 ++--
 poezio/logger.py                     |  2 +-
 poezio/mam.py                        |  4 ++--
 poezio/multiuserchat.py              |  8 +++++---
 poezio/pep.py                        |  8 ++++----
 poezio/plugin_e2ee.py                | 18 +++++++++---------
 poezio/tabs/adhoc_commands_list.py   |  4 ++--
 poezio/tabs/basetabs.py              | 20 +++++++++++---------
 poezio/tabs/bookmarkstab.py          |  8 ++++----
 poezio/tabs/confirmtab.py            |  4 ++--
 poezio/tabs/conversationtab.py       | 14 +++++++-------
 poezio/tabs/data_forms.py            |  4 ++--
 poezio/tabs/listtab.py               |  4 ++--
 poezio/tabs/muclisttab.py            |  4 ++--
 poezio/tabs/muctab.py                | 30 ++++++++++++++++--------------
 poezio/tabs/privatetab.py            |  6 +++---
 poezio/tabs/rostertab.py             |  4 ++--
 poezio/text_buffer.py                | 16 +++++++++-------
 poezio/theming.py                    |  7 +++----
 poezio/timed_events.py               |  8 ++++----
 poezio/ui/render.py                  | 20 +++++++++++---------
 poezio/user.py                       |  8 ++++----
 poezio/windows/base_wins.py          |  6 ++++--
 poezio/windows/bookmark_forms.py     |  2 +-
 poezio/windows/image.py              |  4 ++--
 poezio/windows/info_wins.py          |  8 +++++---
 poezio/windows/input_placeholders.py |  2 +-
 poezio/windows/inputs.py             | 16 ++++++++--------
 poezio/windows/list.py               |  8 ++++----
 poezio/windows/misc.py               |  2 +-
 poezio/windows/muc.py                |  2 +-
 poezio/windows/roster_win.py         |  4 ++--
 poezio/windows/text_win.py           | 10 +++++-----
 poezio/xdg.py                        |  4 ++--
 poezio/xhtml.py                      | 20 ++++++++++----------
 46 files changed, 180 insertions(+), 166 deletions(-)

diff --git a/poezio/bookmarks.py b/poezio/bookmarks.py
index d842d2dd..4ce06cf0 100644
--- a/poezio/bookmarks.py
+++ b/poezio/bookmarks.py
@@ -152,7 +152,7 @@ class Bookmark:
 
 class BookmarkList:
     def __init__(self):
-        self.bookmarks = []  # type: List[Bookmark]
+        self.bookmarks: List[Bookmark] = []
         preferred = config.get('use_bookmarks_method').lower()
         if preferred not in ('pep', 'privatexml'):
             preferred = 'privatexml'
diff --git a/poezio/colors.py b/poezio/colors.py
index c1019145..adb2ca40 100644
--- a/poezio/colors.py
+++ b/poezio/colors.py
@@ -37,7 +37,7 @@ def ncurses_color_to_rgb(color: int) -> Tuple[float, float, float]:
 
 def generate_ccg_palette(curses_palette: List[int],
                          reference_y: float) -> Palette:
-    cbcr_palette = {}  # type: Dict[float, Tuple[float, int]]
+    cbcr_palette: Dict[float, Tuple[float, int]] = {}
     for curses_color in curses_palette:
         r, g, b = ncurses_color_to_rgb(curses_color)
         # drop grayscale
diff --git a/poezio/common.py b/poezio/common.py
index 315d5b9e..5332d408 100644
--- a/poezio/common.py
+++ b/poezio/common.py
@@ -250,7 +250,7 @@ def find_delayed_tag(message: Message) -> Tuple[bool, Optional[datetime]]:
 
     find_delay = message.xml.find
     delay_tag = find_delay('{urn:xmpp:delay}delay')
-    date = None  # type: Optional[datetime]
+    date: Optional[datetime] = None
     if delay_tag is not None:
         delayed = True
         date = _datetime_tuple(delay_tag.attrib['stamp'])
diff --git a/poezio/config.py b/poezio/config.py
index 9a51e53f..78581775 100644
--- a/poezio/config.py
+++ b/poezio/config.py
@@ -383,8 +383,7 @@ class Config(RawConfigParser):
         if file_ok(self.file_name):
             try:
                 with self.file_name.open('r', encoding='utf-8') as df:
-                    lines_before = [line.strip()
-                                    for line in df]  # type: List[str]
+                    lines_before: List[str] = [line.strip() for line in df]
             except OSError:
                 log.error(
                     'Unable to read the config file %s',
@@ -394,7 +393,7 @@ class Config(RawConfigParser):
         else:
             lines_before = []
 
-        sections = {}  # type: Dict[str, List[int]]
+        sections: Dict[str, List[int]] = {}
         duplicate_section = False
         current_section = ''
         current_line = 0
diff --git a/poezio/contact.py b/poezio/contact.py
index 50ccab1f..3330a2a6 100644
--- a/poezio/contact.py
+++ b/poezio/contact.py
@@ -29,8 +29,8 @@ class Resource:
         data: the dict to use as a source
         """
         # Full JID
-        self._jid = jid  # type: str
-        self._data = data  # type: Dict[str, Union[str, int]]
+        self._jid: str = jid
+        self._data: Dict[str, Union[str, int]] = data
 
     @property
     def jid(self) -> str:
@@ -69,12 +69,12 @@ class Contact:
         item: a slixmpp RosterItem pointing to that contact
         """
         self.__item = item
-        self.folded_states = defaultdict(lambda: True)  # type: Dict[str, bool]
+        self.folded_states: Dict[str, bool] = defaultdict(lambda: True)
         self._name = ''
         self.avatar = None
         self.error = None
-        self.tune = {}  # type: Dict[str, str]
-        self.gaming = {}  # type: Dict[str, str]
+        self.tune: Dict[str, str] = {}
+        self.gaming: Dict[str, str] = {}
         self.mood = ''
         self.activity = ''
 
diff --git a/poezio/core/commands.py b/poezio/core/commands.py
index e926dba5..cd957002 100644
--- a/poezio/core/commands.py
+++ b/poezio/core/commands.py
@@ -335,7 +335,7 @@ class CommandCore:
         except InvalidJID:
             return (None, None)
 
-        set_nick = ''  # type: Optional[str]
+        set_nick: Optional[str] = ''
         if len(jid_string) > 1 and jid_string.startswith('/'):
             set_nick = jid_string[1:]
         elif info.resource:
diff --git a/poezio/core/completions.py b/poezio/core/completions.py
index ada8d2b9..98ca9ba0 100644
--- a/poezio/core/completions.py
+++ b/poezio/core/completions.py
@@ -490,7 +490,7 @@ class CompletionCore:
                 tabs.StaticConversationTab,
                 tabs.DynamicConversationTab,
             )
-            tabjid = []  # type: List[JID]
+            tabjid: List[JID] = []
             if isinstance(current_tab, chattabs):
                 tabjid = [current_tab.jid.bare]
 
diff --git a/poezio/core/core.py b/poezio/core/core.py
index 3a13d4c3..2151600f 100644
--- a/poezio/core/core.py
+++ b/poezio/core/core.py
@@ -1171,7 +1171,7 @@ class Core:
         """
         # shortcut
         priority = tabs.STATE_PRIORITY
-        tab_refs = {}  # type: Dict[str, List[tabs.Tab]]
+        tab_refs: Dict[str, List[tabs.Tab]] = {}
         # put all the active tabs in a dict of lists by state
         for tab in self.tabs.get_tabs():
             if not tab:
diff --git a/poezio/core/tabs.py b/poezio/core/tabs.py
index 61bad6f2..a789100d 100644
--- a/poezio/core/tabs.py
+++ b/poezio/core/tabs.py
@@ -54,16 +54,15 @@ class Tabs:
         once. Otherwise, mayhem is expected.
         """
         # cursor
-        self._current_index = 0  # type: int
-        self._current_tab = None  # type: Optional[tabs.Tab]
-
-        self._previous_tab = None  # type: Optional[tabs.Tab]
-        self._tabs = []  # type: List[tabs.Tab]
-        self._tab_jids = dict()  # type: Dict[JID, tabs.Tab]
-        self._tab_types = defaultdict(
-            list)  # type: Dict[Type[tabs.Tab], List[tabs.Tab]]
-        self._tab_names = dict()  # type: Dict[str, tabs.Tab]
-        self._events = events  # type: EventHandler
+        self._current_index: int = 0
+        self._current_tab: Optional[tabs.Tab] = None
+
+        self._previous_tab: Optional[tabs.Tab] = None
+        self._tabs: List[tabs.Tab] = []
+        self._tab_jids: Dict[JID, tabs.Tab] = dict()
+        self._tab_types: Dict[Type[tabs.Tab], List[tabs.Tab]] = defaultdict(list)
+        self._tab_names: Dict[str, tabs.Tab] = dict()
+        self._events: EventHandler = events
 
     def __len__(self):
         return len(self._tabs)
diff --git a/poezio/decorators.py b/poezio/decorators.py
index 62724ecd..6a853446 100644
--- a/poezio/decorators.py
+++ b/poezio/decorators.py
@@ -1,6 +1,9 @@
 """
 Module containing various decorators
 """
+
+from __future__ import annotations
+
 from typing import (
     cast,
     Any,
@@ -179,7 +182,7 @@ command_args_parser = CommandArgParser()
 
 def deny_anonymous(func: Callable) -> Callable:
     """Decorator to disable commands when using an anonymous account."""
-    def wrap(self: 'RosterInfoTab', *args: Any, **kwargs: Any) -> Any:
+    def wrap(self: RosterInfoTab, *args: Any, **kwargs: Any) -> Any:
         if self.core.xmpp.anon:
             return self.core.information(
                 'This command is not available for anonymous accounts.',
diff --git a/poezio/events.py b/poezio/events.py
index 5213f663..63782836 100644
--- a/poezio/events.py
+++ b/poezio/events.py
@@ -48,7 +48,7 @@ class EventHandler:
             'ignored_private',
             'tab_change',
         ]
-        self.events = {}  # type: Dict[str, OrderedDict[int, List[Callable]]]
+        self.events: Dict[str, OrderedDict[int, List[Callable]]] = {}
         for event in events:
             self.events[event] = OrderedDict()
 
diff --git a/poezio/keyboard.py b/poezio/keyboard.py
index 3d8e8d5c..23da2e37 100755
--- a/poezio/keyboard.py
+++ b/poezio/keyboard.py
@@ -26,7 +26,7 @@ log = logging.getLogger(__name__)
 # shortcuts or inserting text in the current output.  The callback
 # is always reset to None afterwards (to resume the normal
 # processing of keys)
-continuation_keys_callback = None  # type: Optional[Callable]
+continuation_keys_callback: Optional[Callable] = None
 
 
 def get_next_byte(s) -> Tuple[Optional[int], Optional[bytes]]:
@@ -46,7 +46,7 @@ def get_next_byte(s) -> Tuple[Optional[int], Optional[bytes]]:
 
 
 def get_char_list(s) -> List[str]:
-    ret_list = []  # type: List[str]
+    ret_list: List[str] = []
     while True:
         try:
             key = s.get_wch()
diff --git a/poezio/logger.py b/poezio/logger.py
index 14882f00..579639e3 100644
--- a/poezio/logger.py
+++ b/poezio/logger.py
@@ -76,7 +76,7 @@ class Logger:
     def __init__(self):
         self._roster_logfile = None  # Optional[IO[Any]]
         # a dict of 'groupchatname': file-object (opened)
-        self._fds = {}  # type: Dict[str, IO[Any]]
+        self._fds: Dict[str, IO[Any]] = {}
 
     def __del__(self):
         for opened_file in self._fds.values():
diff --git a/poezio/mam.py b/poezio/mam.py
index 31ca2f0c..b40ddc4d 100644
--- a/poezio/mam.py
+++ b/poezio/mam.py
@@ -111,10 +111,10 @@ async def get_mam_iterator(
     if 'urn:xmpp:mam:2' not in iq['disco_info'].get_features():
         raise NoMAMSupportException()
 
-    args = {
+    args: Dict[str, Any] = {
         'iterator': True,
         'reverse': reverse,
-    }  # type: Dict[str, Any]
+    }
 
     if groupchat:
         args['jid'] = remote_jid
diff --git a/poezio/multiuserchat.py b/poezio/multiuserchat.py
index f4383176..71b5cceb 100644
--- a/poezio/multiuserchat.py
+++ b/poezio/multiuserchat.py
@@ -10,6 +10,8 @@ Add some facilities that are not available on the XEP_0045
 slix plugin
 """
 
+from __future__ import annotations
+
 from xml.etree import ElementTree as ET
 from typing import (
     Callable,
@@ -103,7 +105,7 @@ def change_subject(xmpp: ClientXMPP, jid: JID, subject: str) -> None:
 
 
 def change_nick(
-    core: 'Core',
+    core: Core,
     jid: JID,
     nick: str,
     status: Optional[str] = None,
@@ -120,14 +122,14 @@ def change_nick(
 
 
 def join_groupchat(
-    core: 'Core',
+    core: Core,
     jid: JID,
     nick: str,
     passwd: str = '',
     status: Optional[str] = None,
     show: Optional[str] = None,
     seconds: Optional[int] = None,
-    tab: Optional['Tab'] = None
+    tab: Optional[Tab] = None
 ) -> None:
     xmpp = core.xmpp
     stanza = xmpp.make_presence(
diff --git a/poezio/pep.py b/poezio/pep.py
index 52cc4cd5..dde97ed6 100644
--- a/poezio/pep.py
+++ b/poezio/pep.py
@@ -5,7 +5,7 @@ extracted directly from the XEP
 
 from typing import Dict
 
-MOODS = {
+MOODS: Dict[str, str] = {
     'afraid': 'Afraid',
     'amazed': 'Amazed',
     'angry': 'Angry',
@@ -86,9 +86,9 @@ MOODS = {
     'undefined': 'Undefined',
     'weak': 'Weak',
     'worried': 'Worried'
-}  # type: Dict[str, str]
+}
 
-ACTIVITIES = {
+ACTIVITIES: Dict[str, Dict[str, str]] = {
     'doing_chores': {
         'category': 'Doing_chores',
         'buying_groceries': 'Buying groceries',
@@ -204,4 +204,4 @@ ACTIVITIES = {
         'studying': 'Studying',
         'other': 'Other',
     }
-}  # type: Dict[str, Dict[str, str]]
+}
diff --git a/poezio/plugin_e2ee.py b/poezio/plugin_e2ee.py
index 9d1d4903..a0856957 100644
--- a/poezio/plugin_e2ee.py
+++ b/poezio/plugin_e2ee.py
@@ -97,30 +97,30 @@ class E2EEPlugin(BasePlugin):
 
     #: Encryption name, used in command descriptions, and logs. At least one
     #: of `encryption_name` and `encryption_short_name` must be set.
-    encryption_name = None  # type: Optional[str]
+    encryption_name: Optional[str] = None
 
     #: Encryption short name, used as command name, and also to display
     #: encryption status in a tab. At least one of `encryption_name` and
     #: `encryption_short_name` must be set.
-    encryption_short_name = None  # type: Optional[str]
+    encryption_short_name: Optional[str] = None
 
     #: Required. https://xmpp.org/extensions/xep-0380.html.
-    eme_ns = None  # type: Optional[str]
+    eme_ns: Optional[str] = None
 
     #: Used to figure out what messages to attempt decryption for. Also used
     #: in combination with `tag_whitelist` to avoid removing encrypted tags
     #: before sending.
-    encrypted_tags = None  # type: Optional[List[Tuple[str, str]]]
+    encrypted_tags: Optional[List[Tuple[str, str]]] = None
 
     # Static map, to be able to limit to one encryption mechanism per tab at a
     # time
-    _enabled_tabs = {}  # type: Dict[JID, Callable]
+    _enabled_tabs: Dict[JID, Callable] = {}
 
     # Tabs that support this encryption mechanism
-    supported_tab_types = tuple()  # type: Tuple[ChatTabs]
+    supported_tab_types: Tuple[ChatTabs] = tuple()
 
     # States for each remote entity
-    trust_states = {'accepted': set(), 'rejected': set()}  # type: Dict[str, Set[str]]
+    trust_states: Dict[str, Set[str]] = {'accepted': set(), 'rejected': set()}
 
     def init(self):
         self._all_trust_states = self.trust_states['accepted'].union(
@@ -229,7 +229,7 @@ class E2EEPlugin(BasePlugin):
         return ""
 
     def _toggle_tab(self, _input: str) -> None:
-        jid = self.api.current_tab().jid  # type: JID
+        jid: JID = self.api.current_tab().jid
 
         if self._encryption_enabled(jid):
             del self._enabled_tabs[jid]
@@ -394,7 +394,7 @@ class E2EEPlugin(BasePlugin):
         # Find who to encrypt to. If in a groupchat this can be multiple JIDs.
         # It is possible that we are not able to find a jid (e.g., semi-anon
         # MUCs). Let the plugin decide what to do with this information.
-        jids = [message['to']]  # type: Optional[List[JID]]
+        jids: Optional[List[JID]] = [message['to']]
         tab = self.core.tabs.by_jid(message['to'])
         if tab is None:  # When does that ever happen?
             log.debug('Attempting to encrypt a message to \'%s\' '
diff --git a/poezio/tabs/adhoc_commands_list.py b/poezio/tabs/adhoc_commands_list.py
index b62166b0..3b6bc1db 100644
--- a/poezio/tabs/adhoc_commands_list.py
+++ b/poezio/tabs/adhoc_commands_list.py
@@ -16,8 +16,8 @@ log = logging.getLogger(__name__)
 
 
 class AdhocCommandsListTab(ListTab):
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, jid):
         ListTab.__init__(
diff --git a/poezio/tabs/basetabs.py b/poezio/tabs/basetabs.py
index e4cdc3af..3907d7bc 100644
--- a/poezio/tabs/basetabs.py
+++ b/poezio/tabs/basetabs.py
@@ -13,6 +13,8 @@ This module also defines ChatTabs, the parent class for all tabs
 revolving around chats.
 """
 
+from __future__ import annotations
+
 import copy
 import logging
 import string
@@ -111,13 +113,13 @@ SHOW_NAME = {
 
 
 class Tab:
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
     # Placeholder values, set on resize
     height = 1
     width = 1
 
-    def __init__(self, core: 'Core'):
+    def __init__(self, core: Core):
         self.core = core
         self.nb = 0
         if not hasattr(self, 'name'):
@@ -133,7 +135,7 @@ class Tab:
         self.commands = {}  # and their own commands
 
     @property
-    def size(self) -> 'SizeManager':
+    def size(self) -> SizeManager:
         return self.core.size
 
     @staticmethod
@@ -196,7 +198,7 @@ class Tab:
             self._state = 'normal'
 
     @staticmethod
-    def initial_resize(scr: '_CursesWindow'):
+    def initial_resize(scr: _CursesWindow):
         Tab.height, Tab.width = scr.getmaxyx()
         windows.base_wins.TAB_WIN = scr
 
@@ -479,8 +481,8 @@ class ChatTab(Tab):
     Also, ^M is already bound to on_enter
     And also, add the /say command
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
     message_type = 'chat'
 
     def __init__(self, core, jid: Union[JID, str]):
@@ -492,7 +494,7 @@ class ChatTab(Tab):
         self._jid = jid
         #: Is the tab currently requesting MAM data?
         self.query_status = False
-        self._name = jid.full  # type: Optional[str]
+        self._name: Optional[str] = jid.full
         self.text_win = windows.TextWin()
         self.directed_presence = None
         self._text_buffer = TextBuffer()
@@ -532,7 +534,7 @@ class ChatTab(Tab):
             desc='Fix the last message with whatever you want.',
             shortdesc='Correct the last message.',
             completion=self.completion_correct)
-        self.chat_state = None  # type: Optional[str]
+        self.chat_state: Optional[str] = None
         self.update_commands()
         self.update_keys()
 
diff --git a/poezio/tabs/bookmarkstab.py b/poezio/tabs/bookmarkstab.py
index eb390bd3..c4fdadd3 100644
--- a/poezio/tabs/bookmarkstab.py
+++ b/poezio/tabs/bookmarkstab.py
@@ -21,15 +21,15 @@ class BookmarksTab(Tab):
     A tab displaying lines of bookmarks, each bookmark having
     a 4 widgets to set the jid/password/autojoin/storage method
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, bookmarks: BookmarkList):
         Tab.__init__(self, core)
         self.name = "Bookmarks"
         self.bookmarks = bookmarks
-        self.new_bookmarks = []  # type: List[Bookmark]
-        self.removed_bookmarks = []  # type: List[Bookmark]
+        self.new_bookmarks: List[Bookmark] = []
+        self.removed_bookmarks: List[Bookmark] = []
         self.header_win = windows.ColumnHeaderWin(
             ('name', 'room@server/nickname', 'password', 'autojoin',
              'storage'))
diff --git a/poezio/tabs/confirmtab.py b/poezio/tabs/confirmtab.py
index c13de4a6..89d0daf5 100644
--- a/poezio/tabs/confirmtab.py
+++ b/poezio/tabs/confirmtab.py
@@ -13,8 +13,8 @@ log = logging.getLogger(__name__)
 
 
 class ConfirmTab(Tab):
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self,
                  core,
diff --git a/poezio/tabs/conversationtab.py b/poezio/tabs/conversationtab.py
index 5950e4cb..5d62fa5f 100644
--- a/poezio/tabs/conversationtab.py
+++ b/poezio/tabs/conversationtab.py
@@ -38,9 +38,9 @@ class ConversationTab(OneToOneTab):
     The tab containing a normal conversation (not from a MUC)
     Must not be instantiated, use Static or Dynamic version only.
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
-    additional_information = {}  # type: Dict[str, Callable[[str], str]]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
+    additional_information: Dict[str, Callable[[str], str]] = {}
     message_type = 'chat'
 
     def __init__(self, core, jid):
@@ -377,8 +377,8 @@ class DynamicConversationTab(ConversationTab):
     bad idea so it has been removed.
     Only one DynamicConversationTab can be opened for a given jid.
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, jid, resource=None):
         self.locked_resource = None
@@ -447,8 +447,8 @@ class StaticConversationTab(ConversationTab):
     A conversation tab associated with one Full JID. It cannot be locked to
     an different resource or unlocked.
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, jid):
         ConversationTab.__init__(self, core, jid)
diff --git a/poezio/tabs/data_forms.py b/poezio/tabs/data_forms.py
index f4ed63e5..8e13a84c 100644
--- a/poezio/tabs/data_forms.py
+++ b/poezio/tabs/data_forms.py
@@ -17,8 +17,8 @@ class DataFormsTab(Tab):
     A tab containing various window type, displaying
     a form that the user needs to fill.
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, form, on_cancel, on_send, kwargs):
         Tab.__init__(self, core)
diff --git a/poezio/tabs/listtab.py b/poezio/tabs/listtab.py
index 87e7d9f4..3489eb9c 100644
--- a/poezio/tabs/listtab.py
+++ b/poezio/tabs/listtab.py
@@ -18,8 +18,8 @@ log = logging.getLogger(__name__)
 
 
 class ListTab(Tab):
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, name, help_message, header_text, cols):
         """Parameters:
diff --git a/poezio/tabs/muclisttab.py b/poezio/tabs/muclisttab.py
index 4c1e492f..f6b3fc35 100644
--- a/poezio/tabs/muclisttab.py
+++ b/poezio/tabs/muclisttab.py
@@ -20,8 +20,8 @@ class MucListTab(ListTab):
     A tab listing rooms from a specific server, displaying various information,
     scrollable, and letting the user join them, etc
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core, server):
         ListTab.__init__(self, core, server.full, "“j”: join room.",
diff --git a/poezio/tabs/muctab.py b/poezio/tabs/muctab.py
index 182e7145..88fb5419 100644
--- a/poezio/tabs/muctab.py
+++ b/poezio/tabs/muctab.py
@@ -7,6 +7,8 @@ It keeps track of many things such as part/joins, maintains an
 user list, and updates private tabs when necessary.
 """
 
+from __future__ import annotations
+
 import asyncio
 import bisect
 import curses
@@ -78,38 +80,38 @@ class MucTab(ChatTab):
     It contains a userlist, an input, a topic, an information and a chat zone
     """
     message_type = 'groupchat'
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable[..., Any]]
-    additional_information = {}  # type: Dict[str, Callable[[str], str]]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable[..., Any]] = {}
+    additional_information: Dict[str, Callable[[str], str]] = {}
     lagged = False
 
-    def __init__(self, core: 'Core', jid: JID, nick: str, password: Optional[str] = None) -> None:
+    def __init__(self, core: Core, jid: JID, nick: str, password: Optional[str] = None) -> None:
         ChatTab.__init__(self, core, jid)
         self.joined = False
         self._state = 'disconnected'
         # our nick in the MUC
         self.own_nick = nick
         # self User object
-        self.own_user = None  # type: Optional[User]
+        self.own_user: Optional[User] = None
         self.password = password
         # buffered presences
-        self.presence_buffer = []  # type: List[Presence]
+        self.presence_buffer: List[Presence] = []
         # userlist
-        self.users = []  # type: List[User]
+        self.users: List[User] = []
         # private conversations
-        self.privates = []  # type: List[Tab]
+        self.privates: List[Tab] = []
         self.topic = ''
         self.topic_from = ''
         # Self ping event, so we can cancel it when we leave the room
-        self.self_ping_event = None  # type: Optional[timed_events.DelayedEvent]
+        self.self_ping_event: Optional[timed_events.DelayedEvent] = None
         # UI stuff
         self.topic_win = windows.Topic()
         self.v_separator = windows.VerticalSeparator()
         self.user_win = windows.UserList()
         self.info_header = windows.MucInfoWin()
-        self.input = windows.MessageInput()  # type: windows.MessageInput
+        self.input: windows.MessageInput = windows.MessageInput()
         # List of ignored users
-        self.ignores = []  # type: List[User]
+        self.ignores: List[User] = []
         # keys
         self.register_keys()
         self.update_keys()
@@ -149,14 +151,14 @@ class MucTab(ChatTab):
         """
         del MucTab.additional_information[plugin_name]
 
-    def cancel_config(self, form: 'Form') -> None:
+    def cancel_config(self, form: Form) -> None:
         """
         The user do not want to send their config, send an iq cancel
         """
         asyncio.ensure_future(self.core.xmpp['xep_0045'].cancel_config(self.jid.bare))
         self.core.close_tab()
 
-    def send_config(self, form: 'Form') -> None:
+    def send_config(self, form: Form) -> None:
         """
         The user sends their config to the server
         """
@@ -1406,7 +1408,7 @@ class MucTab(ChatTab):
         /configure
         """
 
-        def on_form_received(form: 'Form') -> None:
+        def on_form_received(form: Form) -> None:
             if not form:
                 self.core.information(
                     'Could not retrieve the configuration form', 'Error')
diff --git a/poezio/tabs/privatetab.py b/poezio/tabs/privatetab.py
index f29e302c..54b9a15d 100644
--- a/poezio/tabs/privatetab.py
+++ b/poezio/tabs/privatetab.py
@@ -35,10 +35,10 @@ class PrivateTab(OneToOneTab):
     """
     The tab containing a private conversation (someone from a MUC)
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
     message_type = 'chat'
-    additional_information = {}  # type: Dict[str, Callable[[str], str]]
+    additional_information: Dict[str, Callable[[str], str]] = {}
 
     def __init__(self, core, jid, nick):
         OneToOneTab.__init__(self, core, jid)
diff --git a/poezio/tabs/rostertab.py b/poezio/tabs/rostertab.py
index 072e0776..15a59455 100644
--- a/poezio/tabs/rostertab.py
+++ b/poezio/tabs/rostertab.py
@@ -36,8 +36,8 @@ class RosterInfoTab(Tab):
     """
     A tab, split in two, containing the roster and infos
     """
-    plugin_commands = {}  # type: Dict[str, Command]
-    plugin_keys = {}  # type: Dict[str, Callable]
+    plugin_commands: Dict[str, Command] = {}
+    plugin_keys: Dict[str, Callable] = {}
 
     def __init__(self, core):
         Tab.__init__(self, core)
diff --git a/poezio/text_buffer.py b/poezio/text_buffer.py
index 6ef8e3d4..89bae3a2 100644
--- a/poezio/text_buffer.py
+++ b/poezio/text_buffer.py
@@ -8,6 +8,8 @@ Each text buffer can be linked to multiple windows, that will be rendered
 independently by their TextWins.
 """
 
+from __future__ import annotations
+
 import logging
 log = logging.getLogger(__name__)
 
@@ -62,23 +64,23 @@ class TextBuffer:
 
         if messages_nb_limit is None:
             messages_nb_limit = cast(int, config.get('max_messages_in_memory'))
-        self._messages_nb_limit = messages_nb_limit  # type: int
+        self._messages_nb_limit: int = messages_nb_limit
         # Message objects
-        self.messages = []  # type: List[BaseMessage]
+        self.messages: List[BaseMessage] = []
         # COMPAT: Correction id -> Original message id.
-        self.correction_ids = {}  # type: Dict[str, str]
+        self.correction_ids: Dict[str, str] = {}
         # we keep track of one or more windows
         # so we can pass the new messages to them, as they are added, so
         # they (the windows) can build the lines from the new message
-        self._windows = []  # type: List[TextWin]
+        self._windows: List[TextWin] = []
 
     def add_window(self, win) -> None:
         self._windows.append(win)
 
     def find_last_gap_muc(self) -> Optional[HistoryGap]:
         """Find the last known history gap contained in buffer"""
-        leave = None  # type:Optional[Tuple[int, BaseMessage]]
-        join = None  # type:Optional[Tuple[int, BaseMessage]]
+        leave: Optional[Tuple[int, BaseMessage]] = None
+        join: Optional[Tuple[int, BaseMessage]] = None
         for i, item in enumerate(reversed(self.messages)):
             if isinstance(item, MucOwnLeaveMessage):
                 leave = (len(self.messages) - i - 1, item)
@@ -250,7 +252,7 @@ class TextBuffer:
                        new_id: str,
                        highlight: bool = False,
                        time: Optional[datetime] = None,
-                       user: Optional['User'] = None,
+                       user: Optional[User] = None,
                        jid: Optional[str] = None) -> Message:
         """
         Correct a message in a text buffer.
diff --git a/poezio/theming.py b/poezio/theming.py
index 7752fe15..6245a48d 100755
--- a/poezio/theming.py
+++ b/poezio/theming.py
@@ -291,7 +291,7 @@ class Theme:
             (224, -1), (225, -1), (226, -1), (227, -1)]
     # XEP-0392 consistent color generation palette placeholder
     # it’s generated on first use when accessing the ccg_palette property
-    CCG_PALETTE = None  # type: Optional[Dict[float, int]]
+    CCG_PALETTE: Optional[Dict[float, int]] = None
     CCG_Y = 0.5**0.45
 
     # yapf: enable
@@ -393,8 +393,7 @@ theme = Theme()
 # Each time we use a color tuple, we check if it has already been used.
 # If not we create a new color_pair and keep it in that dict, to use it
 # the next time.
-curses_colors_dict = {
-}  # type: Dict[Union[Tuple[int, int], Tuple[int, int, str]], int]
+curses_colors_dict: Dict[Union[Tuple[int, int], Tuple[int, int, str]], int] = {}
 
 # yapf: disable
 
@@ -418,7 +417,7 @@ table_256_to_16 = [
 ]
 # yapf: enable
 
-load_path = []  # type: List[str]
+load_path: List[str] = []
 
 
 def color_256_to_16(color):
diff --git a/poezio/timed_events.py b/poezio/timed_events.py
index cd7659e2..3354443a 100644
--- a/poezio/timed_events.py
+++ b/poezio/timed_events.py
@@ -32,11 +32,11 @@ class DelayedEvent:
         :param function callback: The handler that will be executed.
         :param args: Optional arguments passed to the handler.
         """
-        self.callback = callback  # type: Callable
-        self.args = args  # type: Tuple[Any, ...]
-        self.delay = delay  # type: Union[int, float]
+        self.callback: Callable = callback
+        self.args: Tuple[Any, ...] = args
+        self.delay: Union[int, float] = delay
         # An asyncio handler, as returned by call_later() or call_at()
-        self.handler = None  # type: Optional[Handle]
+        self.handler: Optional[Handle] = None
 
 
 class TimedEvent(DelayedEvent):
diff --git a/poezio/ui/render.py b/poezio/ui/render.py
index f37ea39e..13e493f1 100644
--- a/poezio/ui/render.py
+++ b/poezio/ui/render.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import curses
 
 from datetime import (
@@ -52,7 +54,7 @@ LinePos = Tuple[int, int]
 
 def generate_lines(lines: List[LinePos], msg: BaseMessage, default_color: str = '') -> List[Line]: 
     line_objects = []
-    attrs = []  # type: List[str]
+    attrs: List[str] = []
     prepend = default_color if default_color else ''
     for line in lines:
         saved = Line(
@@ -114,7 +116,7 @@ def build_xmllog(msg: XMLLog, width: int, timestamp: bool, nick_size: int = 10)
 
 
 @singledispatch
-def write_pre(msg: BaseMessage, win: 'Win', with_timestamps: bool, nick_size: int) -> int:
+def write_pre(msg: BaseMessage, win: Win, with_timestamps: bool, nick_size: int) -> int:
     """Write the part before text (only the timestamp)"""
     if with_timestamps:
         return PreMessageHelpers.write_time(win, False, msg.time)
@@ -122,7 +124,7 @@ def write_pre(msg: BaseMessage, win: 'Win', with_timestamps: bool, nick_size: in
 
 
 @write_pre.register(Message)
-def write_pre_message(msg: Message, win: 'Win', with_timestamps: bool, nick_size: int) -> int:
+def write_pre_message(msg: Message, win: Win, with_timestamps: bool, nick_size: int) -> int:
     """Write the part before the body:
         - timestamp (short or long)
         - ack/nack
@@ -165,7 +167,7 @@ def write_pre_message(msg: Message, win: 'Win', with_timestamps: bool, nick_size
 
 
 @write_pre.register(XMLLog)
-def write_pre_xmllog(msg: XMLLog, win: 'Win', with_timestamps: bool, nick_size: int) -> int:
+def write_pre_xmllog(msg: XMLLog, win: Win, with_timestamps: bool, nick_size: int) -> int:
     """Write the part before the stanza (timestamp + IN/OUT)"""
     offset = 0
     if with_timestamps:
@@ -186,7 +188,7 @@ def write_pre_xmllog(msg: XMLLog, win: 'Win', with_timestamps: bool, nick_size:
 class PreMessageHelpers:
 
     @staticmethod
-    def write_revisions(buffer: 'Win', msg: Message) -> int:
+    def write_revisions(buffer: Win, msg: Message) -> int:
         if msg.revisions:
             color = get_theme().COLOR_REVISIONS_MESSAGE
             with buffer.colored_text(color=color):
@@ -195,7 +197,7 @@ class PreMessageHelpers:
         return 0
 
     @staticmethod
-    def write_ack(buffer: 'Win') -> int:
+    def write_ack(buffer: Win) -> int:
         theme = get_theme()
         color = theme.COLOR_CHAR_ACK
         with buffer.colored_text(color=color):
@@ -204,7 +206,7 @@ class PreMessageHelpers:
         return poopt.wcswidth(theme.CHAR_ACK_RECEIVED) + 1
 
     @staticmethod
-    def write_nack(buffer: 'Win') -> int:
+    def write_nack(buffer: Win) -> int:
         theme = get_theme()
         color = theme.COLOR_CHAR_NACK
         with buffer.colored_text(color=color):
@@ -213,7 +215,7 @@ class PreMessageHelpers:
         return poopt.wcswidth(theme.CHAR_NACK) + 1
 
     @staticmethod
-    def write_nickname(buffer: 'Win', nickname: str, color, highlight=False) -> None:
+    def write_nickname(buffer: Win, nickname: str, color, highlight=False) -> None:
         """
         Write the nickname, using the user's color
         and return the number of written characters
@@ -231,7 +233,7 @@ class PreMessageHelpers:
             buffer.addstr(nickname)
 
     @staticmethod
-    def write_time(buffer: 'Win', history: bool, time: datetime) -> int:
+    def write_time(buffer: Win, history: bool, time: datetime) -> int:
         """
         Write the date on the yth line of the window
         """
diff --git a/poezio/user.py b/poezio/user.py
index 5aed5031..3724d229 100644
--- a/poezio/user.py
+++ b/poezio/user.py
@@ -41,12 +41,12 @@ class User:
                  deterministic=True,
                  color='') -> None:
         # The oldest possible time
-        self.last_talked = datetime(1, 1, 1)  # type: datetime
+        self.last_talked: datetime = datetime(1, 1, 1)
         self.update(affiliation, show, status, role)
         self.change_nick(nick)
-        self.jid = jid  # type: JID
-        self.chatstate = None  # type: Optional[str]
-        self.color = (1, 1)  # type: Tuple[int, int]
+        self.jid: JID = jid
+        self.chatstate: Optional[str] = None
+        self.color: Tuple[int, int] = (1, 1)
         if color != '':
             self.change_color(color, deterministic)
         else:
diff --git a/poezio/windows/base_wins.py b/poezio/windows/base_wins.py
index f371c106..1347553a 100644
--- a/poezio/windows/base_wins.py
+++ b/poezio/windows/base_wins.py
@@ -7,7 +7,9 @@ the text window, the roster window, etc.
 A Tab (see the poezio.tabs module) is composed of multiple Windows
 """
 
-TAB_WIN = None  # type: _CursesWindow
+from __future__ import annotations
+
+TAB_WIN: _CursesWindow = None
 
 import logging
 log = logging.getLogger(__name__)
@@ -41,7 +43,7 @@ class Win:
     __slots__ = ('_win', 'height', 'width', 'y', 'x')
 
     def __init__(self) -> None:
-        self._win = None  # type: _CursesWindow
+        self._win: _CursesWindow = None
         self.height, self.width = 0, 0
 
     def _resize(self, height: int, width: int, y: int, x: int) -> None:
diff --git a/poezio/windows/bookmark_forms.py b/poezio/windows/bookmark_forms.py
index d538e6a2..f1e737fd 100644
--- a/poezio/windows/bookmark_forms.py
+++ b/poezio/windows/bookmark_forms.py
@@ -161,7 +161,7 @@ class BookmarksWin(Win):
         self._current_input = 0
         self.current_horizontal_input = 0
         self._bookmarks = list(bookmarks)
-        self.lines = []  # type: List[Tuple[BookmarkNameInput, BookmarkJIDInput, BookmarkPasswordInput, BookmarkAutojoinWin, BookmarkMethodInput]]
+        self.lines: List[Tuple[BookmarkNameInput, BookmarkJIDInput, BookmarkPasswordInput, BookmarkAutojoinWin, BookmarkMethodInput]] = []
         for bookmark in sorted(self._bookmarks, key=lambda x: str(x.jid)):
             self.lines.append((BookmarkNameInput(bookmark),
                                BookmarkJIDInput(bookmark),
diff --git a/poezio/windows/image.py b/poezio/windows/image.py
index ebecb5ad..79ecf7d9 100644
--- a/poezio/windows/image.py
+++ b/poezio/windows/image.py
@@ -69,10 +69,10 @@ class ImageWin(Win):
     __slots__ = ('_image', '_display_avatar')
 
     def __init__(self) -> None:
-        self._image = None  # type: Optional[Image.Image]
+        self._image: Optional[Image.Image] = None
         Win.__init__(self)
         if config.get('image_use_half_blocks'):
-            self._display_avatar = self._display_avatar_half_blocks  # type: Callable[[int, int], None]
+            self._display_avatar: Callable[[int, int], None] = self._display_avatar_half_blocks
         else:
             self._display_avatar = self._display_avatar_full_blocks
 
diff --git a/poezio/windows/info_wins.py b/poezio/windows/info_wins.py
index c3975c8c..cd775e33 100644
--- a/poezio/windows/info_wins.py
+++ b/poezio/windows/info_wins.py
@@ -3,6 +3,8 @@ Module defining all the "info wins", ie the bar which is on top of the
 info buffer in normal tabs
 """
 
+from __future__ import annotations
+
 from typing import Optional, Dict, TYPE_CHECKING, Any
 
 import logging
@@ -272,9 +274,9 @@ class MucInfoWin(InfoWin):
 
     def refresh(
         self,
-        room: 'MucTab',
-        window: Optional['TextWin'] = None,
-        user: Optional['User'] = None,
+        room: MucTab,
+        window: Optional[TextWin] = None,
+        user: Optional[User] = None,
         information: Optional[Dict[str, Any]] = None
     ) -> None:
         log.debug('Refresh: %s', self.__class__.__name__)
diff --git a/poezio/windows/input_placeholders.py b/poezio/windows/input_placeholders.py
index 4d414636..3ec57583 100644
--- a/poezio/windows/input_placeholders.py
+++ b/poezio/windows/input_placeholders.py
@@ -23,7 +23,7 @@ class HelpText(Win):
 
     def __init__(self, text: str = '') -> None:
         Win.__init__(self)
-        self.txt = text  # type: str
+        self.txt: str = text
 
     def refresh(self, txt: Optional[str] = None) -> None:
         log.debug('Refresh: %s', self.__class__.__name__)
diff --git a/poezio/windows/inputs.py b/poezio/windows/inputs.py
index 5cca8803..b3601913 100644
--- a/poezio/windows/inputs.py
+++ b/poezio/windows/inputs.py
@@ -41,7 +41,7 @@ class Input(Win):
 
     # it easy cut and paste text between various input
     def __init__(self) -> None:
-        self.key_func = {
+        self.key_func: Dict[str, Callable] = {
             "KEY_LEFT": self.key_left,
             "KEY_RIGHT": self.key_right,
             "KEY_END": self.key_end,
@@ -66,7 +66,7 @@ class Input(Win):
             '^?': self.key_backspace,
             "M-^?": self.delete_word,
             # '^J': self.add_line_break,
-        }  # type: Dict[str, Callable]
+        }
         Win.__init__(self)
         self.text = ''
         self.pos = 0  # The position of the “cursor” in the text
@@ -76,8 +76,8 @@ class Input(Win):
         # screen
         self.on_input = DEFAULT_ON_INPUT  # callback called on any key pressed
         self.color = None  # use this color on addstr
-        self.last_completion = None  # type: Optional[str]
-        self.hit_list = []  # type: List[str]
+        self.last_completion: Optional[str] = None
+        self.hit_list: List[str] = []
 
     def on_delete(self) -> None:
         """
@@ -592,7 +592,7 @@ class HistoryInput(Input):
     """
     __slots__ = ('help_message', 'histo_pos', 'current_completed', 'search')
 
-    history = []  # type: List[str]
+    history: List[str] = []
 
     def __init__(self) -> None:
         Input.__init__(self)
@@ -603,7 +603,7 @@ class HistoryInput(Input):
         self.search = False
         if config.get('separate_history'):
             # pylint: disable=assigning-non-slot
-            self.history = []  # type: List[str]
+            self.history: List[str] = []
 
     def toggle_search(self) -> None:
         if self.help_message:
@@ -680,7 +680,7 @@ class MessageInput(HistoryInput):
     Also letting the user enter colors or other text markups
     """
     # The history is common to all MessageInput
-    history = []  # type: List[str]
+    history: List[str] = []
 
     def __init__(self) -> None:
         HistoryInput.__init__(self)
@@ -726,7 +726,7 @@ class CommandInput(HistoryInput):
     HelpMessage when a command is started
     The on_input callback
     """
-    history = []  # type: List[str]
+    history: List[str] = []
 
     def __init__(self, help_message: str, on_abort, on_success, on_input=None) -> None:
         HistoryInput.__init__(self)
diff --git a/poezio/windows/list.py b/poezio/windows/list.py
index c427a79e..1c5d834f 100644
--- a/poezio/windows/list.py
+++ b/poezio/windows/list.py
@@ -24,10 +24,10 @@ class ListWin(Win):
 
     def __init__(self, columns: Dict[str, int], with_headers: bool = True) -> None:
         Win.__init__(self)
-        self._columns = columns  # type: Dict[str, int]
-        self._columns_sizes = {}  # type: Dict[str, int]
+        self._columns: Dict[str, int] = columns
+        self._columns_sizes: Dict[str, int] = {}
         self.sorted_by = (None, None)  # for example: ('name', '↑')
-        self.lines = []  # type: List[str]
+        self.lines: List[str] = []
         self._selected_row = 0
         self._starting_pos = 0  # The column number from which we start the refresh
 
@@ -173,7 +173,7 @@ class ColumnHeaderWin(Win):
     def __init__(self, columns: List[str]) -> None:
         Win.__init__(self)
         self._columns = columns
-        self._columns_sizes = {}  # type: Dict[str, int]
+        self._columns_sizes: Dict[str, int] = {}
         self._column_sel = ''
         self._column_order = ''
         self._column_order_asc = False
diff --git a/poezio/windows/misc.py b/poezio/windows/misc.py
index 6c04b814..8739db0c 100644
--- a/poezio/windows/misc.py
+++ b/poezio/windows/misc.py
@@ -37,7 +37,7 @@ class SimpleTextWin(Win):
     def __init__(self, text) -> None:
         Win.__init__(self)
         self._text = text
-        self.built_lines = []  # type: List[str]
+        self.built_lines: List[str] = []
 
     def rebuild_text(self) -> None:
         """
diff --git a/poezio/windows/muc.py b/poezio/windows/muc.py
index 951940e1..05fe683e 100644
--- a/poezio/windows/muc.py
+++ b/poezio/windows/muc.py
@@ -33,7 +33,7 @@ class UserList(Win):
     def __init__(self) -> None:
         Win.__init__(self)
         self.pos = 0
-        self.cache = []  # type: List[CachedUser]
+        self.cache: List[CachedUser] = []
 
     def scroll_up(self) -> bool:
         self.pos += self.height - 1
diff --git a/poezio/windows/roster_win.py b/poezio/windows/roster_win.py
index 2efdd324..c4a1c30b 100644
--- a/poezio/windows/roster_win.py
+++ b/poezio/windows/roster_win.py
@@ -26,8 +26,8 @@ class RosterWin(Win):
         Win.__init__(self)
         self.pos = 0  # cursor position in the contact list
         self.start_pos = 1  # position of the start of the display
-        self.selected_row = None  # type: Optional[Row]
-        self.roster_cache = []  # type: List[Row]
+        self.selected_row: Optional[Row] = None
+        self.roster_cache: List[Row] = []
 
     @property
     def roster_len(self) -> int:
diff --git a/poezio/windows/text_win.py b/poezio/windows/text_win.py
index 2cb75271..ac60dee7 100644
--- a/poezio/windows/text_win.py
+++ b/poezio/windows/text_win.py
@@ -30,17 +30,17 @@ class TextWin(Win):
         Win.__init__(self)
         if lines_nb_limit is None:
             lines_nb_limit = config.get('max_lines_in_memory')
-        self.lines_nb_limit = lines_nb_limit  # type: int
+        self.lines_nb_limit: int = lines_nb_limit
         self.pos = 0
         # Each new message is built and kept here.
         # on resize, we rebuild all the messages
-        self.built_lines = []  # type: List[Union[None, Line]]
+        self.built_lines: List[Union[None, Line]] = []
 
         self.lock = False
-        self.lock_buffer = []  # type: List[Union[None, Line]]
-        self.separator_after = None  # type: Optional[Line]
+        self.lock_buffer: List[Union[None, Line]] = []
+        self.separator_after: Optional[Line] = None
         # the Lines of the highlights in that buffer
-        self.highlights = []  # type: List[Line]
+        self.highlights: List[Line] = []
         # the current HL position in that list NaN means that we’re not on
         # an hl. -1 is a valid position (it's before the first hl of the
         # list. i.e the separator, in the case where there’s no hl before
diff --git a/poezio/xdg.py b/poezio/xdg.py
index 0b63998c..d4ce0538 100644
--- a/poezio/xdg.py
+++ b/poezio/xdg.py
@@ -15,11 +15,11 @@ from os import environ
 from typing import Dict
 
 # $HOME has already been checked to not be None in test_env().
-DEFAULT_PATHS = {
+DEFAULT_PATHS: Dict[str, Path] = {
     'XDG_CONFIG_HOME': Path.home() / '.config',
     'XDG_DATA_HOME': Path.home() / '.local' / 'share',
     'XDG_CACHE_HOME': Path.home() / '.cache',
-}  # type: Dict[str, Path]
+}
 
 
 def _get_directory(variable: str) -> Path:
diff --git a/poezio/xhtml.py b/poezio/xhtml.py
index 0b234c29..ebbffb02 100644
--- a/poezio/xhtml.py
+++ b/poezio/xhtml.py
@@ -32,7 +32,7 @@ digits = '0123456789'  # never trust the modules
 XHTML_NS = 'http://www.w3.org/1999/xhtml'
 
 # HTML named colors
-colors = {
+colors: Dict[str, int] = {
     'aliceblue': 231,
     'antiquewhite': 231,
     'aqua': 51,
@@ -180,7 +180,7 @@ colors = {
     'whitesmoke': 255,
     'yellow': 226,
     'yellowgreen': 149
-}  # type: Dict[str, int]
+}
 
 whitespace_re = re.compile(r'\s+')
 
@@ -302,11 +302,11 @@ def get_hash(data: bytes) -> str:
 class XHTMLHandler(sax.ContentHandler):
     def __init__(self, force_ns=False,
                  tmp_image_dir: Optional[Path] = None) -> None:
-        self.builder = []  # type: List[str]
-        self.formatting = []  # type: List[str]
-        self.attrs = []  # type: List[Dict[str, str]]
-        self.list_state = []  #  type: List[Union[str, int]]
-        self.cids = {}  #  type: Dict[str, Optional[str]]
+        self.builder: List[str] = []
+        self.formatting: List[str] = []
+        self.attrs: List[Dict[str, str]] = []
+        self.list_state: List[Union[str, int]] = []
+        self.cids: Dict[str, Optional[str]] = {}
         self.is_pre = False
         self.a_start = 0
         # do not care about xhtml-in namespace
@@ -512,7 +512,7 @@ def convert_simple_to_full_colors(text: str) -> str:
     return re.sub(xhtml_simple_attr_re, add_curly_bracket, text)
 
 
-number_to_color_names = {
+number_to_color_names: Dict[int, str] = {
     1: 'red',
     2: 'green',
     3: 'yellow',
@@ -520,7 +520,7 @@ number_to_color_names = {
     5: 'violet',
     6: 'turquoise',
     7: 'white'
-}  # type: Dict[int, str]
+}
 
 
 def format_inline_css(_dict: Dict[str, str]) -> str:
@@ -535,7 +535,7 @@ def poezio_colors_to_html(string: str) -> str:
     # Maintain a list of the current css attributes used
     # And check if a tag is open (by design, we only open
     # spans tag, and they cannot be nested.
-    current_attrs = {}  # type: Dict[str, str]
+    current_attrs: Dict[str, str] = {}
     tag_open = False
     next_attr_char = string.find('\x19')
     build = ["<body xmlns='http://www.w3.org/1999/xhtml'><p>"]
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