Discord.py How to make a if this fail function - discord.py

Question

Hi I have following code
#commands.command(name="playing", aliases=["np"])
async def playing_command(self, ctx, name: t.Optional[str]):
player = self.get_player(ctx)
name = name or player.queue.current_track.title
async with ctx.typing():
async with aiohttp.request("GET", LYRICS_URL + name, headers={}) as r:
#if not 200 <= r.status <= 299:
#raise NoLyricsFound
data = await r.json()
if not player.is_playing:
raise PlayerIsAlreadyPaused
embed = discord.Embed(
title="Wird gespielt",
colour=ctx.author.colour,
timestamp=dt.datetime.utcnow(),
)
embed.set_thumbnail(url=data["thumbnail"]["genius"])
embed.set_footer(text=f"Requested by {ctx.author.display_name}", icon_url=ctx.author.avatar_url)
embed.add_field(name="Track title", value=player.queue.current_track.title, inline=False)
embed.add_field(name="Artist", value=player.queue.current_track.author, inline=False)
position = divmod(player.position, 60000)
length = divmod(player.queue.current_track.length, 60000)
embed.add_field(
name="Position",
value=f"{int(position[0])}:{round(position[1]/1000):02}/{int(length[0])}:{round(length[1]/1000):02}",
inline=False
)
await ctx.send(embed=embed)
But when I run this and the bot cant find a Thumbnail I get the key Error 'thumbnail'
So I tried this
#playing_command.error
async def playing_command(self, ctx, name: t.Optional[str]):
player = self.get_player(ctx)
name = name or player.queue.current_track.title
async with ctx.typing():
async with aiohttp.request("GET", LYRICS_URL + name, headers={}) as r:
#if not 200 <= r.status <= 299:
#raise NoLyricsFound
data = await r.json()
if not player.is_playing:
raise PlayerIsAlreadyPaused
embed = discord.Embed(
title="Wird gespielt",
colour=ctx.author.colour,
timestamp=dt.datetime.utcnow(),
)
embed.set_footer(text=f"Requested by {ctx.author.display_name}", icon_url=ctx.author.avatar_url)
embed.add_field(name="Track title", value=player.queue.current_track.title, inline=False)
embed.add_field(name="Artist", value=player.queue.current_track.author, inline=False)
position = divmod(player.position, 60000)
length = divmod(player.queue.current_track.length, 60000)
embed.add_field(
name="Position",
value=f"{int(position[0])}:{round(position[1]/1000):02}/{int(length[0])}:{round(length[1]/1000):02}",
inline=False
)
await ctx.send(embed=embed)
But with this I get errors like
_ClientEventTask exception was never retrieved
future: <ClientEventTask state=finished event=on_message coro=<bound method MusicBot.on_message of <bot.bot.MusicBot object at 0x0000022FEF05E6A0>> exception=CommandInvokeError('Command raised an exception: TypeError: can only concatenate str (not "CommandInvokeError") to str')>
Traceback (most recent call last):
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 85, in wrapped
ret = await coro(*args, **kwargs)
File "C:\Users\user\Desktop\Neuer Ordner\MusicBot\bot\cogs\music.py", line 637, in playing_command
embed.set_thumbnail(url=data["thumbnail"]["genius"])
KeyError: 'thumbnail'
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 939, in invoke
await ctx.command.invoke(ctx)
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 863, in invoke
await injected(*ctx.args, **ctx.kwargs)
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 94, in wrapped
raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: KeyError: 'thumbnail'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 71, in wrapped
ret = await coro(*args, **kwargs)
File "C:\Users\user\Desktop\Neuer Ordner\MusicBot\bot\cogs\music.py", line 658, in error_command
async with aiohttp.request("GET", LYRICS_URL + name, headers={}) as r:
TypeError: can only concatenate str (not "CommandInvokeError") to str
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 348, in _run_event
await self.on_error(event_name, *args, **kwargs)
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\client.py", line 343, in _run_event
await coro(*args, **kwargs)
File "C:\Users\user\Desktop\Neuer Ordner\MusicBot\bot\bot.py", line 68, in on_message
await self.process_commands(msg)
File "C:\Users\user\Desktop\Neuer Ordner\MusicBot\bot\bot.py", line 64, in process_commands
await self.invoke(ctx)
File "C:\Users\user\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\bot.py", line 943, in invoke
await ctx.command.dispatch_error(ctx, exc)
File "C:\Users\User\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 422, in dispatch_error
await injected(cog, ctx, error)
File "C:\Users\User\AppData\Local\Programs\Python\Python39\lib\site-packages\discord\ext\commands\core.py", line 77, in wrapped
raise CommandInvokeError(exc) from exc
discord.ext.commands.errors.CommandInvokeError: Command raised an exception: TypeError: can only concatenate str (not "CommandInvokeError") to str
How to fix this
I just want when the thumbnail function fails that the bot send a embed without thumbnail

Answer 1

To check if a key exists in a dict you can use the in operator.
>>> "key" in {"key": "value"}
True
So just put an if around the set_thumbnail line.
if "thumbnail" in data and "genius" in data["thumbnail"]:
embed.set_thumbnail(url=data["thumbnail"]["genius"])
If the if's condition is False it won't run set_thumbnail so it won't add one, like you wanted.