You are probably running the rewrite version of discord.py, since the discord.Client
object does not a have a send_message
method.
To fix your problem you can just have it as:
async def test(author, message):
await message.channel.send('I heard you! {0.name}'.format(author))
but for what i see you doing I reccomend using the commands extension
This makes creating a bot and commands for the bot much simpler, for example here is some code that does exactly the same as yours
from discord.ext import commands
bot = commands.Bot(command_prefix='!')
@bot.command()
async def test(ctx):
await ctx.send('I heard you! {0}'.format(ctx.author))
bot.run('token')