@client.event
async def on_message(message):
    if message.content.lower().startswith('->>diga'):
        if not message.content.lower().startswith('->>diga ->>diga'):
            if '>channel' in message.content.lower():
                if message.author.server_permissions.administrator:
                    pos = message.content.lower().find('>channel')
                    channel2 = (message.content.lower()[pos+9:].rstrip())
                    msg = str(message.content[7:pos-1])
                    canal = discord.utils.find(lambda c: c.name == str(channel2), client.get_all_channels())
                    await client.send_message(canal, msg)
            if not '>channel' in message.content.lower():
                msg = message.content[7:]
                await client.send_message(message.channel, msg)

client.run(token)