QR invite fixes

qrinvite/qrinvite.py

@@ -2,13 +2,10 @@ import pathlib
 
 import aiohttp
 import discord
+from MyQR import myqr
 from PIL import Image
-
-from redbot.core import Config, checks, commands
-
+from redbot.core import Config, commands
 from redbot.core.bot import Red
-
-from MyQR import myqr
 from redbot.core.data_manager import cog_data_path
 
 
@@ -27,7 +24,7 @@ class QRInvite:
         self.config.register_guild(**default_guild)
 
     @commands.command()
-    async def qrinvite(self, ctx: commands.Context, invite: str=None, colorized: bool=False, image_url: str=None):
+    async def qrinvite(self, ctx: commands.Context, invite: str = None, colorized: bool = False, image_url: str = None):
         """
         Create a custom QR code invite for this server
         """
@@ -46,10 +43,15 @@ class QRInvite:
         if image_url is None:
             image_url = ctx.guild.icon_url
 
-        extension = pathlib.Path(image_url).parts[-1].replace('.','?').split('?')[1]
+        if image_url == "":  # Still
+            await ctx.send(
+                "Could not get an image, please provide one. *(`{}help qrinvite` for details)*".format(ctx.prefix))
+            return
+
+        extension = pathlib.Path(image_url).parts[-1].replace('.', '?').split('?')[1]
 
         path: pathlib.Path = cog_data_path(self)
-        image_path = path / (ctx.guild.icon+"."+extension)
+        image_path = path / (ctx.guild.icon + "." + extension)
         async with aiohttp.ClientSession() as session:
             async with session.get(image_url) as response:
                 image = await response.read()
@@ -62,20 +64,21 @@ class QRInvite:
         else:
             new_path = str(image_path)
 
-        myqr.run(invite,picture=new_path,save_name=ctx.guild.icon+"_qrcode.png",
-                 save_dir=str(cog_data_path(self)),colorized=colorized,)
+        myqr.run(invite, picture=new_path, save_name=ctx.guild.icon + "_qrcode.png",
+                 save_dir=str(cog_data_path(self)), colorized=colorized, )
 
-        png_path: pathlib.Path = path / (ctx.guild.icon+"_qrcode.png")
+        png_path: pathlib.Path = path / (ctx.guild.icon + "_qrcode.png")
         with png_path.open("rb") as png_fp:
             await ctx.send(file=discord.File(png_fp.read(), "qrcode.png"))
 
+
 def convert_png(path):
     im = Image.open(path)
     im.load()
     alpha = im.split()[-1]
     im = im.convert('RGB').convert('P', palette=Image.ADAPTIVE, colors=255)
-    mask = Image.eval(alpha, lambda a: 255 if a <=128 else 0)
+    mask = Image.eval(alpha, lambda a: 255 if a <= 128 else 0)
     im.paste(255, mask)
-    newPath = path.replace(".webp",".png")
-    im.save(newPath, transparency=255)
-    return newPath
+    new_path = path.replace(".webp", ".png")
+    im.save(new_path, transparency=255)
+    return new_path