discord bot response to private message python

1import discord
2
3client = discord.Client()
4
5@client.event
6async def on_ready():
7    print('We have logged in as {0.user}'.format(client))
8
9@client.event
10async def on_message(message):
11    if message.author == client.user:
12        return
13
14    if message.content.startswith('$hello'):
15        await message.channel.send('Hello!')
16
17client.run('your token here')

1@bot.event
2async def on_message(message):
3    if isinstance(message.channel, discord.channel.DMChannel) and message.author != bot.user:
4        await message.channel.send('This is a DM')