RuntimeError: This event loop is already running | Error while using discord.py

Question

I am trying to make a command in mcoc.py cog -

    @commands.command()
    async def mcoc(self, ctx, tier_str:int,*,champname:str):  
        champname = champname.strip()
        champname = champname.lower()
        if champname == "bwcv":
            champname=="blackwidow_timely"
        url = f"https://auntm.ai/champions/{champname}/tier/{tier_str}"
                                                                                                                           
        session = AsyncHTMLSession()
        
        r = await session.get(url)
        
        await r.html.render(sleep=1, keep_page=True, scrolldown=1)
        
        information = await r.html.find("div.sc-hiSbYr.XqbgT")
        sig = await r.html.find('div.sc-fbNXWD.iFMyOV')
        name = await r.html.find('div.sc-cxFLnm.izBVou')
        tier_access = information[0]
        self.tier = tier_access.text
async with ctx.typing:
            embed = discord.Embed(title=f"{self.name_of_champ}",description=f"More Information about {self.name_of_champ} can be found (here)[{self.url_page}]")
            await ctx.send(embed=embed)

But continuesly I am getting the error-

Ignoring exception in on_command_error
Traceback (most recent call last):
  File "/home/indo/.local/lib/python3.9/site-packages/discord/ext/commands/core.py", line 85, in wrapped
    ret = await coro(*args, **kwargs)
  File "/home/indo/Documents/Python/LoB/cogs/mcoc.py", line 119, in mcoc
    await r.html.render(sleep=1, keep_page=True, scrolldown=1)
  File "/home/indo/.local/lib/python3.9/site-packages/requests_html.py", line 598, in render
    content, result, page = self.session.loop.run_until_complete(self._async_render(url=self.url, script=script, sleep=sleep, wait=wait, content=self.html, reload=reload, scrolldown=scrolldown, timeout=timeout, keep_page=keep_page))
  File "/usr/lib/python3.9/asyncio/base_events.py", line 618, in run_until_complete
    self._check_running()
  File "/usr/lib/python3.9/asyncio/base_events.py", line 578, in _check_running
    raise RuntimeError('This event loop is already running')
RuntimeError: This event loop is already running

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/indo/.local/lib/python3.9/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: RuntimeError: This event loop is already running

Even after continues attempts, I am still getting the error, What's the reason and how can I fix this?

The error message mentions use of run_until_complete. Python's default asyncio library doesn't allow this type of nested loops ie only one event loop can run. This loop is occupied by discord.py so any library setting up its own loop is incompatible with discord.py. There might be a workaround though. — Nevus
– Nevus, Commented Sep 19, 2021 at 11:53
Found this question and this library but since both discord.py and requests_html are third party packages, I doubt these would apply to your case. — Nevus
– Nevus, Commented Sep 19, 2021 at 11:56
Is it the first thing that runs? I am no expert but it seems that any solution would be monkeypatching at best. You might have to switch libraries to make it work. — Nevus
– Nevus, Commented Sep 19, 2021 at 14:01

Data Engineer · Accepted Answer · 2022-01-08 21:01:27Z

0

To resolve the error <RuntimeError: This event loop is already running> , which seems to be specific for Jupyter Notebook and Jupyter Lab, do this:

pip install nest_asyncio

you may also need this in your python app

import nest_asyncio
nest_asyncio.apply()

For complete patch info refence:

https://github.com/psf/requests-html/issues/402

https://github.com/erdewit/nest_asyncio

answered Jan 8, 2022 at 21:01

Data Engineer

8263 gold badges19 silver badges46 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

RuntimeError: This event loop is already running | Error while using discord.py

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related