Use walrus operator when assigning and checking for None.

cogs/commands/submission.py

@@ -64,10 +64,7 @@ class SubmissionCog(commands.Cog):
                 .where(col(Category.group_id) == int(group_id))
                 .where(col(Category.id) == int(category_id))
             )
-
-            category: Category | None = session.scalar(stmt)
-
-            if category is None:
+            if (category := session.scalar(stmt)) is None:
                 await interaction.response.send_message("Category not found.", ephemeral=True)
                 return
 
@@ -79,10 +76,13 @@ class SubmissionCog(commands.Cog):
                 return
 
             # check with regex if score is in correct format
-            verified_score = await self.verify_score(interaction, score, is_time_record=category.is_time_record)
-
             # check if verify_score was successful. It replies with corrections required itself.
-            if verified_score is None:
+            if (
+                verified_score := await self.verify_score(interaction, score, is_time_record=category.is_time_record)
+            ) is None:
+                # This response message will be filled out better once command is split up to
+                # know which type it expects...
+                await interaction.response.send_message("Format was incorrect.", ephemeral=True)
                 return
 
             # Create submission verification request or submit score if verification not needed.
@@ -92,16 +92,13 @@ class SubmissionCog(commands.Cog):
                 return
 
             stmt = select(col(Guild.verification_channel)).where(col(Guild.id) == interaction.guild_id)
-            verification_channel_id: int | None = session.scalar(stmt)
 
-            if verification_channel_id is None:
+            if (verification_channel_id := session.scalar(stmt)) is None:
                 error_response = "No verification channel was registered. Contact server admins."
                 await interaction.response.send_message(error_response, ephemeral=True)
                 return
 
-            channel = interaction.guild.get_channel(verification_channel_id)
-
-            if channel is None:
+            if (channel := interaction.guild.get_channel(verification_channel_id)) is None:
                 error_response = "Registered Verification channel does not exist. Contact server admins."
                 await interaction.response.send_message(error_response, ephemeral=True)
                 return