Comando ping

@client.event
async def on_message(message):
    if message.content.lower().startswith('a!ping'):
        timep = time.time()
        emb = discord.Embed(title='Aguarde', color=0x565656)
        pingm0 = await client.send_message(message.channel, embed=emb)
        ping = time.time() - timep
        pingm1 = discord.Embed(title='Pong!', description=':ping_pong: Ping - %.01f segundos' % ping, color=0x00000)
        await client.edit_message(pingm0, embed=pingm1)