Add karma delete thingy

karma.py

@@ -2,9 +2,10 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
+from __future__ import annotations
+
 import collections
 import re
-from typing import Optional
 
 import errbot
 
@@ -30,7 +31,7 @@ class Karma(errbot.BotPlugin):
         return f"Karma for '{target}' is now {self['karma'][target]}"
 
     @errbot.re_botcmd(pattern=r"(.+)\+\+", prefixed=False, flags=re.IGNORECASE)
-    def on_karma_inc(self, message: errbot.Message, match: re.Match) -> Optional[str]:
+    def on_karma_inc(self, message: errbot.Message, match: re.Match) -> str | None:
         """Adds karma"""
         if message.frm == self.bot_identifier:
             return
@@ -40,7 +41,7 @@ class Karma(errbot.BotPlugin):
         return self._change_karma(match.group(1), 1)
 
     @errbot.re_botcmd(pattern=r"(.+)--", prefixed=False, flags=re.IGNORECASE)
-    def on_karma_dec(self, message: errbot.Message, match: re.Match) -> Optional[str]:
+    def on_karma_dec(self, message: errbot.Message, match: re.Match) -> str | None:
         """Removes karma"""
         if message.frm == self.bot_identifier:
             return
@@ -48,7 +49,7 @@ class Karma(errbot.BotPlugin):
         return self._change_karma(match.group(1), -1)
 
     @errbot.botcmd
-    def karma(self, message: errbot.Message, args: Optional[str]) -> str:
+    def karma(self, message: errbot.Message, args: str | None) -> str:
         """Gets karma"""
         if not args:
             return "**Usage**: !karma <target>"
@@ -56,7 +57,7 @@ class Karma(errbot.BotPlugin):
         return f"Karma for '{args}' is {self['karma'][args]}"
 
     @errbot.botcmd
-    def karma_top(self, message: errbot.Message, args: Optional[str]) -> str:
+    def karma_top(self, message: errbot.Message, args: str | None) -> str:
         """Gets the top n items"""
         if len(self["karma"]) == 0:
             return "There are no items with karma"
@@ -70,7 +71,7 @@ class Karma(errbot.BotPlugin):
         return ", ".join([f"{k}: {v}" for k, v in top])
 
     @errbot.botcmd
-    def karma_bottom(self, message: errbot.Message, args: Optional[str]) -> str:
+    def karma_bottom(self, message: errbot.Message, args: str | None) -> str:
         """Gets the bottom n items"""
         if len(self["karma"]) == 0:
             return "There are no items with karma"
@@ -82,3 +83,14 @@ class Karma(errbot.BotPlugin):
 
         bottom = self["karma"].most_common()[: -num - 1 : -1]
         return ", ".join([f"{k}: {v}" for k, v in bottom])
+
+    @errbot.botcmd
+    def karma_reset(self, message: errbot.Message, args: str | None) -> str:
+        args = args.strip()
+
+        if args not in self["karma"]:
+            return "**Error**: no such item"
+
+        with self.mutable("karma") as k:
+            del k[args]
+        return f"Deleted {args}"