Fuzzy match the role command.

bot/exts/info/information.py

@@ -6,7 +6,8 @@
 from string import Template
 from typing import Any, Mapping, Optional, Tuple, Union
 
-from discord import ChannelType, Colour, Embed, Guild, Message, Role, Status, utils
+import fuzzywuzzy
+from discord import ChannelType, Colour, Embed, Guild, Message, Role, Status
 from discord.abc import GuildChannel
 from discord.ext.commands import BucketType, Cog, Context, Paginator, command, group, has_any_role
 
@@ -106,22 +107,28 @@ async def role_info(self, ctx: Context, *roles: Union[Role, str]) -> None:
 
         To specify multiple roles just add to the arguments, delimit roles with spaces in them using quotation marks.
         """
-        parsed_roles = []
-        failed_roles = []
+        parsed_roles = set()
+        failed_roles = set()
 
+        all_roles = {role.id: role.name for role in ctx.guild.roles}
         for role_name in roles:
             if isinstance(role_name, Role):
                 # Role conversion has already succeeded
-                parsed_roles.append(role_name)
+                parsed_roles.add(role_name)
                 continue
 
-            role = utils.find(lambda r: r.name.lower() == role_name.lower(), ctx.guild.roles)
+            match = fuzzywuzzy.process.extractOne(
+                role_name, all_roles, score_cutoff=80,
+                scorer=fuzzywuzzy.fuzz.ratio
+            )
 
-            if not role:
-                failed_roles.append(role_name)
+            if not match:
+                failed_roles.add(role_name)
                 continue
 
-            parsed_roles.append(role)
+            # `match` is a (role name, score, role id) tuple
+            role = ctx.guild.get_role(match[2])
+            parsed_roles.add(role)
 
         if failed_roles:
             await ctx.send(f":x: Could not retrieve the following roles: {', '.join(failed_roles)}")

tests/bot/exts/info/test_information.py

@@ -65,7 +65,7 @@ async def test_role_info_command(self):
             permissions=discord.Permissions(0),
         )
 
-        self.ctx.guild.roles.append([dummy_role, admin_role])
+        self.ctx.guild.roles.extend([dummy_role, admin_role])
 
         self.cog.role_info.can_run = unittest.mock.AsyncMock()
         self.cog.role_info.can_run.return_value = True