upload attachment discord.py code example
Example 1: discord.py send image
await channel.send(file=discord.File('path/to/image.png'))
Example 2: discord.py add reaction to message
#1
message = ctx.send("text")
#2
message = channel.send("text")
#3
message = channel.fetch_message(messageid)
#add reaction to message
emoji = '\N{THUMBS UP SIGN}'
await message.add_reaction(emoji)