Migrate to discord.py 2.0

[shri30yans]

With the introduction of discord.py 2.0, there come many breaking changes. The code needs to be migrated to discord.py 2.0

[Aditya-wani02]

Can I contribute ??
I am a beginner.
plz can you explain what I have to do?

[shri30yans]

You can go ahead and contribute.

A complete list of breaking changes in v2.0 can be found here.
Some changes include

Adding each cog asynchronously

# before
def setup(bot):
    bot.add_cog(MyCog(bot))

# after
async def setup(bot):
    await bot.add_cog(MyCog(bot))

Event loop changes

 # before
 async def connection_pool():
    bot.pool = await asyncpg.create_pool(
    database=DATABASE_DICT["database"],
            user=DATABASE_DICT["user"],
            password=DATABASE_DICT["password"],
            host=DATABASE_DICT["host"],
            port=DATABASE_DICT["port"],
            max_inactive_connection_lifetime=5,
 bot.loop.run_until_complete(connection_pool())   
 bot.run(TOKEN)

 # after
async def main():
    async with bot:
        await setup(bot)
        async with bot, asyncpg.create_pool(
            database=DATABASE_DICT["database"],
            user=DATABASE_DICT["user"],
            password=DATABASE_DICT["password"],
            host=DATABASE_DICT["host"],
            port=DATABASE_DICT["port"],
            max_inactive_connection_lifetime=5,) as pool:
            bot.pool = pool
            await bot.start(TOKEN)

asyncio.run(main())

Changes to the profile picture URL

 # before
 ctx.author.avatar_url
 
 # after 
 ctx.author.display_avatar.url