[Core] Support already loaded packages in [p]load (#2116)

redbot/core/bot.py

@@ -11,10 +11,10 @@ import discord
 import sys
 from discord.ext.commands import when_mentioned_or
 
+from . import Config, i18n, commands, errors
 from .cog_manager import CogManager
-from . import Config, i18n, commands
-from .rpc import RPCMixin
 from .help_formatter import Help, help as help_
+from .rpc import RPCMixin
 from .sentry import SentryManager
 from .utils import common_filters
 
@@ -217,7 +217,7 @@ class RedBase(commands.GroupMixin, commands.bot.BotBase, RPCMixin):
     async def load_extension(self, spec: ModuleSpec):
         name = spec.name.split(".")[-1]
         if name in self.extensions:
-            raise discord.ClientException(f"there is already a package named {name} loaded")
+            raise errors.PackageAlreadyLoaded(spec)
 
         lib = spec.loader.load_module()
         if not hasattr(lib, "setup"):

redbot/core/core_commands.py

@@ -13,7 +13,7 @@ from collections import namedtuple
 from pathlib import Path
 from random import SystemRandom
 from string import ascii_letters, digits
-from typing import TYPE_CHECKING, Union
+from typing import TYPE_CHECKING, Union, Tuple, List, Optional, Iterable, Sequence, Dict
 
 import aiohttp
 import discord
@@ -25,6 +25,7 @@ from redbot.core import (
     VersionInfo,
     checks,
     commands,
+    errors,
     i18n,
 )
 from .utils.predicates import MessagePredicate
@@ -59,7 +60,9 @@ class CoreLogic:
         self.bot.register_rpc_handler(self._version_info)
         self.bot.register_rpc_handler(self._invite_url)
 
-    async def _load(self, cog_names: list):
+    async def _load(
+        self, cog_names: Iterable[str]
+    ) -> Tuple[List[str], List[str], List[str], List[str]]:
         """
         Loads cogs by name.
         Parameters
@@ -69,11 +72,12 @@ class CoreLogic:
         Returns
         -------
         tuple
-            3 element tuple of loaded, failed, and not found cogs.
+            4-tuple of loaded, failed, not found and already loaded cogs.
         """
         failed_packages = []
         loaded_packages = []
         notfound_packages = []
+        alreadyloaded_packages = []
 
         bot = self.bot
 
@@ -98,6 +102,8 @@ class CoreLogic:
             try:
                 self._cleanup_and_refresh_modules(spec.name)
                 await bot.load_extension(spec)
+            except errors.PackageAlreadyLoaded:
+                alreadyloaded_packages.append(name)
             except Exception as e:
                 log.exception("Package loading failed", exc_info=e)
 
@@ -109,9 +115,10 @@ class CoreLogic:
                 await bot.add_loaded_package(name)
                 loaded_packages.append(name)
 
-        return loaded_packages, failed_packages, notfound_packages
+        return loaded_packages, failed_packages, notfound_packages, alreadyloaded_packages
 
-    def _cleanup_and_refresh_modules(self, module_name: str):
+    @staticmethod
+    def _cleanup_and_refresh_modules(module_name: str) -> None:
         """Interally reloads modules so that changes are detected"""
         splitted = module_name.split(".")
 
@@ -123,6 +130,7 @@ class CoreLogic:
             else:
                 importlib._bootstrap._exec(lib.__spec__, lib)
 
+        # noinspection PyTypeChecker
         modules = itertools.accumulate(splitted, "{}.{}".format)
         for m in modules:
             maybe_reload(m)
@@ -131,7 +139,10 @@ class CoreLogic:
         for child_name, lib in children.items():
             importlib._bootstrap._exec(lib.__spec__, lib)
 
-    def _get_package_strings(self, packages: list, fmt: str, other: tuple = None):
+    @staticmethod
+    def _get_package_strings(
+        packages: List[str], fmt: str, other: Optional[Tuple[str, ...]] = None
+    ) -> str:
         """
         Gets the strings needed for the load, unload and reload commands
         """
@@ -147,7 +158,7 @@ class CoreLogic:
         final_string = fmt.format(**form)
         return final_string
 
-    async def _unload(self, cog_names: list):
+    async def _unload(self, cog_names: Iterable[str]) -> Tuple[List[str], List[str]]:
         """
         Unloads cogs with the given names.
 
@@ -175,14 +186,16 @@ class CoreLogic:
 
         return unloaded_packages, failed_packages
 
-    async def _reload(self, cog_names):
+    async def _reload(
+        self, cog_names: Sequence[str]
+    ) -> Tuple[List[str], List[str], List[str], List[str]]:
         await self._unload(cog_names)
 
-        loaded, load_failed, not_found = await self._load(cog_names)
+        loaded, load_failed, not_found, already_loaded = await self._load(cog_names)
 
-        return loaded, load_failed, not_found
+        return loaded, load_failed, not_found, already_loaded
 
-    async def _name(self, name: str = None):
+    async def _name(self, name: Optional[str] = None) -> str:
         """
         Gets or sets the bot's username.
 
@@ -201,7 +214,7 @@ class CoreLogic:
 
         return self.bot.user.name
 
-    async def _prefixes(self, prefixes: list = None):
+    async def _prefixes(self, prefixes: Optional[Sequence[str]] = None) -> List[str]:
         """
         Gets or sets the bot's global prefixes.
 
@@ -220,7 +233,8 @@ class CoreLogic:
             await self.bot.db.prefix.set(prefixes)
         return await self.bot.db.prefix()
 
-    async def _version_info(self):
+    @classmethod
+    async def _version_info(cls) -> Dict[str, str]:
         """
         Version information for Red and discord.py
 
@@ -231,7 +245,7 @@ class CoreLogic:
         """
         return {"redbot": __version__, "discordpy": discord.__version__}
 
-    async def _invite_url(self):
+    async def _invite_url(self) -> str:
         """
         Generates the invite URL for the bot.
 
@@ -248,11 +262,8 @@ class CoreLogic:
 class Core(commands.Cog, CoreLogic):
     """Commands related to core functions"""
 
-    def __init__(self, bot):
-        super().__init__(bot)
-
     @commands.command(hidden=True)
-    async def ping(self, ctx):
+    async def ping(self, ctx: commands.Context):
         """Pong."""
         await ctx.send("Pong.")
 
@@ -313,7 +324,7 @@ class Core(commands.Cog, CoreLogic):
         passed = self.get_bot_uptime()
         await ctx.send("Been up for: **{}** (since {} UTC)".format(passed, since))
 
-    def get_bot_uptime(self, *, brief=False):
+    def get_bot_uptime(self, *, brief: bool = False):
         # Courtesy of Danny
         now = datetime.datetime.utcnow()
         delta = now - self.bot.uptime
@@ -416,7 +427,7 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @checks.is_owner()
-    async def traceback(self, ctx, public: bool = False):
+    async def traceback(self, ctx: commands.Context, public: bool = False):
         """Sends to the owner the last command exception that has occurred
 
         If public (yes is specified), it will be sent to the chat instead"""
@@ -433,14 +444,14 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @checks.is_owner()
-    async def invite(self, ctx):
+    async def invite(self, ctx: commands.Context):
         """Show's Red's invite url"""
         await ctx.author.send(await self._invite_url())
 
     @commands.command()
     @commands.guild_only()
     @checks.is_owner()
-    async def leave(self, ctx):
+    async def leave(self, ctx: commands.Context):
         """Leaves server"""
         await ctx.send("Are you sure you want me to leave this server? (y/n)")
 
@@ -460,7 +471,7 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @checks.is_owner()
-    async def servers(self, ctx):
+    async def servers(self, ctx: commands.Context):
         """Lists and allows to leave servers"""
         guilds = sorted(list(self.bot.guilds), key=lambda s: s.name.lower())
         msg = ""
@@ -502,18 +513,21 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @checks.is_owner()
-    async def load(self, ctx, *, cog_name: str):
+    async def load(self, ctx: commands.Context, *cogs: str):
         """Loads packages"""
-
-        cog_names = [c.strip() for c in cog_name.split(" ")]
         async with ctx.typing():
-            loaded, failed, not_found = await self._load(cog_names)
+            loaded, failed, not_found, already_loaded = await self._load(cogs)
 
         if loaded:
             fmt = "Loaded {packs}."
             formed = self._get_package_strings(loaded, fmt)
             await ctx.send(formed)
 
+        if already_loaded:
+            fmt = "The package{plural} {packs} {other} already loaded."
+            formed = self._get_package_strings(already_loaded, fmt, ("is", "are"))
+            await ctx.send(formed)
+
         if failed:
             fmt = (
                 "Failed to load package{plural} {packs}. Check your console or "
@@ -529,12 +543,9 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @checks.is_owner()
-    async def unload(self, ctx, *, cog_name: str):
+    async def unload(self, ctx: commands.Context, *cogs: str):
         """Unloads packages"""
-
+        unloaded, failed = await self._unload(cogs)
-        cog_names = [c.strip() for c in cog_name.split(" ")]
-
-        unloaded, failed = await self._unload(cog_names)
 
         if unloaded:
             fmt = "Package{plural} {packs} {other} unloaded."
@@ -548,10 +559,10 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command(name="reload")
     @checks.is_owner()
-    async def reload(self, ctx, *cogs: str):
+    async def reload(self, ctx: commands.Context, *cogs: str):
         """Reloads packages"""
         async with ctx.typing():
-            loaded, failed, not_found = await self._reload(cogs)
+            loaded, failed, not_found, already_loaded = await self._reload(cogs)
 
         if loaded:
             fmt = "Package{plural} {packs} {other} reloaded."
@@ -570,34 +581,30 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command(name="shutdown")
     @checks.is_owner()
-    async def _shutdown(self, ctx, silently: bool = False):
+    async def _shutdown(self, ctx: commands.Context, silently: bool = False):
         """Shuts down the bot"""
         wave = "\N{WAVING HAND SIGN}"
         skin = "\N{EMOJI MODIFIER FITZPATRICK TYPE-3}"
-        try:  # We don't want missing perms to stop our shutdown
+        with contextlib.suppress(discord.HTTPException):
             if not silently:
                 await ctx.send(_("Shutting down... ") + wave + skin)
-        except:
-            pass
         await ctx.bot.shutdown()
 
     @commands.command(name="restart")
     @checks.is_owner()
-    async def _restart(self, ctx, silently: bool = False):
+    async def _restart(self, ctx: commands.Context, silently: bool = False):
         """Attempts to restart Red
 
         Makes Red quit with exit code 26
         The restart is not guaranteed: it must be dealt
         with by the process manager in use"""
-        try:
+        with contextlib.suppress(discord.HTTPException):
             if not silently:
                 await ctx.send(_("Restarting..."))
-        except:
-            pass
         await ctx.bot.shutdown(restart=True)
 
     @commands.group(name="set")
-    async def _set(self, ctx):
+    async def _set(self, ctx: commands.Context):
         """Changes Red's settings"""
         if ctx.invoked_subcommand is None:
             if ctx.guild:
@@ -629,7 +636,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command()
     @checks.guildowner()
     @commands.guild_only()
-    async def adminrole(self, ctx, *, role: discord.Role):
+    async def adminrole(self, ctx: commands.Context, *, role: discord.Role):
         """Sets the admin role for this server"""
         await ctx.bot.db.guild(ctx.guild).admin_role.set(role.id)
         await ctx.send(_("The admin role for this guild has been set."))
@@ -637,7 +644,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command()
     @checks.guildowner()
     @commands.guild_only()
-    async def modrole(self, ctx, *, role: discord.Role):
+    async def modrole(self, ctx: commands.Context, *, role: discord.Role):
         """Sets the mod role for this server"""
         await ctx.bot.db.guild(ctx.guild).mod_role.set(role.id)
         await ctx.send(_("The mod role for this guild has been set."))
@@ -645,7 +652,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command(aliases=["usebotcolor"])
     @checks.guildowner()
     @commands.guild_only()
-    async def usebotcolour(self, ctx):
+    async def usebotcolour(self, ctx: commands.Context):
         """
         Toggle whether to use the bot owner-configured colour for embeds.
 
@@ -663,7 +670,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command()
     @checks.guildowner()
     @commands.guild_only()
-    async def serverfuzzy(self, ctx):
+    async def serverfuzzy(self, ctx: commands.Context):
         """
         Toggle whether to enable fuzzy command search for the server.
 
@@ -679,7 +686,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command()
     @checks.is_owner()
-    async def fuzzy(self, ctx):
+    async def fuzzy(self, ctx: commands.Context):
         """
         Toggle whether to enable fuzzy command search in DMs.
 
@@ -695,7 +702,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command(aliases=["color"])
     @checks.is_owner()
-    async def colour(self, ctx, *, colour: discord.Colour = None):
+    async def colour(self, ctx: commands.Context, *, colour: discord.Colour = None):
         """
         Sets a default colour to be used for the bot's embeds.
 
@@ -713,7 +720,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command()
     @checks.is_owner()
-    async def avatar(self, ctx, url: str):
+    async def avatar(self, ctx: commands.Context, url: str):
         """Sets Red's avatar"""
         async with aiohttp.ClientSession() as session:
             async with session.get(url) as r:
@@ -737,7 +744,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command(name="game")
     @checks.bot_in_a_guild()
     @checks.is_owner()
-    async def _game(self, ctx, *, game: str = None):
+    async def _game(self, ctx: commands.Context, *, game: str = None):
         """Sets Red's playing status"""
 
         if game:
@@ -751,7 +758,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command(name="listening")
     @checks.bot_in_a_guild()
     @checks.is_owner()
-    async def _listening(self, ctx, *, listening: str = None):
+    async def _listening(self, ctx: commands.Context, *, listening: str = None):
         """Sets Red's listening status"""
 
         status = ctx.bot.guilds[0].me.status if len(ctx.bot.guilds) > 0 else discord.Status.online
@@ -765,7 +772,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command(name="watching")
     @checks.bot_in_a_guild()
     @checks.is_owner()
-    async def _watching(self, ctx, *, watching: str = None):
+    async def _watching(self, ctx: commands.Context, *, watching: str = None):
         """Sets Red's watching status"""
 
         status = ctx.bot.guilds[0].me.status if len(ctx.bot.guilds) > 0 else discord.Status.online
@@ -779,7 +786,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command()
     @checks.bot_in_a_guild()
     @checks.is_owner()
-    async def status(self, ctx, *, status: str):
+    async def status(self, ctx: commands.Context, *, status: str):
         """Sets Red's status
 
         Available statuses:
@@ -808,7 +815,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command()
     @checks.bot_in_a_guild()
     @checks.is_owner()
-    async def stream(self, ctx, streamer=None, *, stream_title=None):
+    async def stream(self, ctx: commands.Context, streamer=None, *, stream_title=None):
         """Sets Red's streaming status
         Leaving both streamer and stream_title empty will clear it."""
 
@@ -829,7 +836,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command(name="username", aliases=["name"])
     @checks.is_owner()
-    async def _username(self, ctx, *, username: str):
+    async def _username(self, ctx: commands.Context, *, username: str):
         """Sets Red's username"""
         try:
             await self._name(name=username)
@@ -848,7 +855,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command(name="nickname")
     @checks.admin()
     @commands.guild_only()
-    async def _nickname(self, ctx, *, nickname: str = None):
+    async def _nickname(self, ctx: commands.Context, *, nickname: str = None):
         """Sets Red's nickname"""
         try:
             await ctx.guild.me.edit(nick=nickname)
@@ -859,7 +866,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command(aliases=["prefixes"])
     @checks.is_owner()
-    async def prefix(self, ctx, *prefixes):
+    async def prefix(self, ctx: commands.Context, *prefixes: str):
         """Sets Red's global prefix(es)"""
         if not prefixes:
             await ctx.send_help()
@@ -870,7 +877,7 @@ class Core(commands.Cog, CoreLogic):
     @_set.command(aliases=["serverprefixes"])
     @checks.admin()
     @commands.guild_only()
-    async def serverprefix(self, ctx, *prefixes):
+    async def serverprefix(self, ctx: commands.Context, *prefixes: str):
         """Sets Red's server prefix(es)"""
         if not prefixes:
             await ctx.bot.db.guild(ctx.guild).prefix.set([])
@@ -882,7 +889,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command()
     @commands.cooldown(1, 60 * 10, commands.BucketType.default)
-    async def owner(self, ctx):
+    async def owner(self, ctx: commands.Context):
         """Sets Red's main owner"""
         # According to the Python docs this is suitable for cryptographic use
         random = SystemRandom()
@@ -926,7 +933,7 @@ class Core(commands.Cog, CoreLogic):
 
     @_set.command()
     @checks.is_owner()
-    async def token(self, ctx, token: str):
+    async def token(self, ctx: commands.Context, token: str):
         """Change bot token."""
 
         if not isinstance(ctx.channel, discord.DMChannel):
@@ -1071,7 +1078,7 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @checks.is_owner()
-    async def backup(self, ctx, backup_path: str = None):
+    async def backup(self, ctx: commands.Context, backup_path: str = None):
         """Creates a backup of all data for the instance."""
         from redbot.core.data_manager import basic_config, instance_name
         from redbot.core.drivers.red_json import JSON
@@ -1134,7 +1141,7 @@ class Core(commands.Cog, CoreLogic):
                     tar.add(str(f), recursive=False)
             print(str(backup_file))
             await ctx.send(
-                _("A backup has been made of this instance. It is at {}.").format((backup_file))
+                _("A backup has been made of this instance. It is at {}.").format(backup_file)
             )
             await ctx.send(_("Would you like to receive a copy via DM? (y/n)"))
 
@@ -1157,7 +1164,7 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.command()
     @commands.cooldown(1, 60, commands.BucketType.user)
-    async def contact(self, ctx, *, message: str):
+    async def contact(self, ctx: commands.Context, *, message: str):
         """Sends a message to the owner"""
         guild = ctx.message.guild
         owner = discord.utils.get(ctx.bot.get_all_members(), id=ctx.bot.owner_id)
@@ -1200,7 +1207,7 @@ class Core(commands.Cog, CoreLogic):
                 await ctx.send(
                     _("I cannot send your message, I'm unable to find my owner... *sigh*")
                 )
-            except:
+            except discord.HTTPException:
                 await ctx.send(_("I'm unable to deliver your message. Sorry."))
             else:
                 await ctx.send(_("Your message has been sent."))
@@ -1212,14 +1219,14 @@ class Core(commands.Cog, CoreLogic):
                 await ctx.send(
                     _("I cannot send your message, I'm unable to find my owner... *sigh*")
                 )
-            except:
+            except discord.HTTPException:
                 await ctx.send(_("I'm unable to deliver your message. Sorry."))
             else:
                 await ctx.send(_("Your message has been sent."))
 
     @commands.command()
     @checks.is_owner()
-    async def dm(self, ctx, user_id: int, *, message: str):
+    async def dm(self, ctx: commands.Context, user_id: int, *, message: str):
         """Sends a DM to a user
 
         This command needs a user id to work.
@@ -1253,7 +1260,7 @@ class Core(commands.Cog, CoreLogic):
 
             try:
                 await destination.send(embed=e)
-            except:
+            except discord.HTTPException:
                 await ctx.send(
                     _("Sorry, I couldn't deliver your message to {}").format(destination)
                 )
@@ -1263,7 +1270,7 @@ class Core(commands.Cog, CoreLogic):
             response = "{}\nMessage:\n\n{}".format(description, message)
             try:
                 await destination.send("{}\n{}".format(box(response), content))
-            except:
+            except discord.HTTPException:
                 await ctx.send(
                     _("Sorry, I couldn't deliver your message to {}").format(destination)
                 )
@@ -1272,7 +1279,7 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.group()
     @checks.is_owner()
-    async def whitelist(self, ctx):
+    async def whitelist(self, ctx: commands.Context):
         """
         Whitelist management commands.
         """
@@ -1290,7 +1297,7 @@ class Core(commands.Cog, CoreLogic):
         await ctx.send(_("User added to whitelist."))
 
     @whitelist.command(name="list")
-    async def whitelist_list(self, ctx):
+    async def whitelist_list(self, ctx: commands.Context):
         """
         Lists whitelisted users.
         """
@@ -1304,7 +1311,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(box(page))
 
     @whitelist.command(name="remove")
-    async def whitelist_remove(self, ctx, user: discord.User):
+    async def whitelist_remove(self, ctx: commands.Context, user: discord.User):
         """
         Removes user from whitelist.
         """
@@ -1321,7 +1328,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(_("User was not in the whitelist."))
 
     @whitelist.command(name="clear")
-    async def whitelist_clear(self, ctx):
+    async def whitelist_clear(self, ctx: commands.Context):
         """
         Clears the whitelist.
         """
@@ -1330,19 +1337,19 @@ class Core(commands.Cog, CoreLogic):
 
     @commands.group()
     @checks.is_owner()
-    async def blacklist(self, ctx):
+    async def blacklist(self, ctx: commands.Context):
         """
         blacklist management commands.
         """
         pass
 
     @blacklist.command(name="add")
-    async def blacklist_add(self, ctx, user: discord.User):
+    async def blacklist_add(self, ctx: commands.Context, user: discord.User):
         """
         Adds a user to the blacklist.
         """
         if await ctx.bot.is_owner(user):
-            ctx.send(_("You cannot blacklist an owner!"))
+            await ctx.send(_("You cannot blacklist an owner!"))
             return
 
         async with ctx.bot.db.blacklist() as curr_list:
@@ -1352,7 +1359,7 @@ class Core(commands.Cog, CoreLogic):
         await ctx.send(_("User added to blacklist."))
 
     @blacklist.command(name="list")
-    async def blacklist_list(self, ctx):
+    async def blacklist_list(self, ctx: commands.Context):
         """
         Lists blacklisted users.
         """
@@ -1366,7 +1373,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(box(page))
 
     @blacklist.command(name="remove")
-    async def blacklist_remove(self, ctx, user: discord.User):
+    async def blacklist_remove(self, ctx: commands.Context, user: discord.User):
         """
         Removes user from blacklist.
         """
@@ -1383,7 +1390,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(_("User was not in the blacklist."))
 
     @blacklist.command(name="clear")
-    async def blacklist_clear(self, ctx):
+    async def blacklist_clear(self, ctx: commands.Context):
         """
         Clears the blacklist.
         """
@@ -1393,14 +1400,14 @@ class Core(commands.Cog, CoreLogic):
     @commands.group()
     @commands.guild_only()
     @checks.admin_or_permissions(administrator=True)
-    async def localwhitelist(self, ctx):
+    async def localwhitelist(self, ctx: commands.Context):
         """
         Whitelist management commands.
         """
         pass
 
     @localwhitelist.command(name="add")
-    async def localwhitelist_add(self, ctx, *, user_or_role: str):
+    async def localwhitelist_add(self, ctx: commands.Context, *, user_or_role: str):
         """
         Adds a user or role to the whitelist.
         """
@@ -1421,7 +1428,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(_("Role added to whitelist."))
 
     @localwhitelist.command(name="list")
-    async def localwhitelist_list(self, ctx):
+    async def localwhitelist_list(self, ctx: commands.Context):
         """
         Lists whitelisted users and roles.
         """
@@ -1435,7 +1442,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(box(page))
 
     @localwhitelist.command(name="remove")
-    async def localwhitelist_remove(self, ctx, *, user_or_role: str):
+    async def localwhitelist_remove(self, ctx: commands.Context, *, user_or_role: str):
         """
         Removes user or role from whitelist.
         """
@@ -1465,7 +1472,7 @@ class Core(commands.Cog, CoreLogic):
                 await ctx.send(_("Role was not in the whitelist."))
 
     @localwhitelist.command(name="clear")
-    async def localwhitelist_clear(self, ctx):
+    async def localwhitelist_clear(self, ctx: commands.Context):
         """
         Clears the whitelist.
         """
@@ -1475,14 +1482,14 @@ class Core(commands.Cog, CoreLogic):
     @commands.group()
     @commands.guild_only()
     @checks.admin_or_permissions(administrator=True)
-    async def localblacklist(self, ctx):
+    async def localblacklist(self, ctx: commands.Context):
         """
         blacklist management commands.
         """
         pass
 
     @localblacklist.command(name="add")
-    async def localblacklist_add(self, ctx, *, user_or_role: str):
+    async def localblacklist_add(self, ctx: commands.Context, *, user_or_role: str):
         """
         Adds a user or role to the blacklist.
         """
@@ -1495,7 +1502,7 @@ class Core(commands.Cog, CoreLogic):
             user = True
 
         if user and await ctx.bot.is_owner(obj):
-            ctx.send(_("You cannot blacklist an owner!"))
+            await ctx.send(_("You cannot blacklist an owner!"))
             return
 
         async with ctx.bot.db.guild(ctx.guild).blacklist() as curr_list:
@@ -1508,7 +1515,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(_("Role added to blacklist."))
 
     @localblacklist.command(name="list")
-    async def localblacklist_list(self, ctx):
+    async def localblacklist_list(self, ctx: commands.Context):
         """
         Lists blacklisted users and roles.
         """
@@ -1522,7 +1529,7 @@ class Core(commands.Cog, CoreLogic):
             await ctx.send(box(page))
 
     @localblacklist.command(name="remove")
-    async def localblacklist_remove(self, ctx, *, user_or_role: str):
+    async def localblacklist_remove(self, ctx: commands.Context, *, user_or_role: str):
         """
         Removes user or role from blacklist.
         """
@@ -1552,7 +1559,7 @@ class Core(commands.Cog, CoreLogic):
                 await ctx.send(_("Role was not in the blacklist."))
 
     @localblacklist.command(name="clear")
-    async def localblacklist_clear(self, ctx):
+    async def localblacklist_clear(self, ctx: commands.Context):
         """
         Clears the blacklist.
         """
@@ -1703,8 +1710,8 @@ class Core(commands.Cog, CoreLogic):
     @autoimmune_group.command(name="list")
     async def autoimmune_list(self, ctx: commands.Context):
         """
-        Get's the current members and roles 
+        Get's the current members and roles
-        
+
         configured for automatic moderation action immunity
         """
         ai_ids = await ctx.bot.db.guild(ctx.guild).autoimmune_ids()

redbot/core/errors.py

@@ -0,0 +1,16 @@
+import importlib.machinery
+
+
+class RedError(Exception):
+    """Base error class for Red-related errors."""
+
+
+class PackageAlreadyLoaded(RedError):
+    """Raised when trying to load an already-loaded package."""
+
+    def __init__(self, spec: importlib.machinery.ModuleSpec, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.spec: importlib.machinery.ModuleSpec = spec
+
+    def __str__(self) -> str:
+        return f"There is already a package named {self.spec.name.split('.')[-1]} loaded"

redbot/core/i18n.py

@@ -3,8 +3,6 @@ import re
 from pathlib import Path
 from typing import Callable, Union
 
-from . import commands
-
 __all__ = ["get_locale", "set_locale", "reload_locales", "cog_i18n", "Translator"]
 
 _current_locale = "en_us"
@@ -219,6 +217,12 @@ class Translator(Callable[[str], str]):
             self.translations.update({untranslated: translated})
 
 
+# This import to be down here to avoid circular import issues.
+# This will be cleaned up at a later date
+# noinspection PyPep8
+from . import commands
+
+
 def cog_i18n(translator: Translator):
     """Get a class decorator to link the translator to this cog."""