Feat: Add emoji confirming/error reactions

If the commands throws an error then the bot marks the command message with a cross emoji reaction otherwise it adds a check mark.
(Also resolved some overshadowing warning of extension)

src/bot.py

@@ -10,6 +10,8 @@ __author__ = 'Bibin Muttappillil'
 # standard library imports
 import os
 from dotenv import load_dotenv
+import sys
+import traceback
 
 # discord imports
 from discord.ext import commands
@@ -25,25 +27,37 @@ if TOKEN is None:
 bot = commands.Bot(command_prefix=commands.when_mentioned_or('$b '))
 
 
-@bot.command(hidden=True)
-@commands.is_owner()
-async def load(ctx, extension):
-	bot.load_extension(f'cogs.{extension}')
-	print(f'cogs.{extension} loaded')
+@bot.event
+async def on_command_error(ctx, error):
+	print('Ignoring exception in command {}:'.format(ctx.command), file=sys.stderr)
+	traceback.print_exception(type(error), error, error.__traceback__, file=sys.stderr)
+	await ctx.message.add_reaction('❌')
+
+
+@bot.event
+async def on_command_completion(ctx):
+	await ctx.message.add_reaction('✅')
 
 
 @bot.command(hidden=True)
 @commands.is_owner()
-async def unload(ctx, extension):
-	bot.unload_extension(f'cogs.{extension}')
-	print(f'cogs.{extension} unloaded')
+async def load(ctx, ext):
+	bot.load_extension(f'cogs.{ext}')
+	print(f'cogs.{ext} loaded')
 
 
 @bot.command(hidden=True)
 @commands.is_owner()
-async def reload(ctx, extension):
-	bot.reload_extension(f'cogs.{extension}')
-	print(f'cogs.{extension} reloaded')
+async def unload(ctx, ext):
+	bot.unload_extension(f'cogs.{ext}')
+	print(f'cogs.{ext} unloaded')
+
+
+@bot.command(hidden=True)
+@commands.is_owner()
+async def reload(ctx, ext):
+	bot.reload_extension(f'cogs.{ext}')
+	print(f'cogs.{ext} reloaded')
 
 
 for extension in ['developer']: