#!/usr/bin/python3
# -*- coding: utf-8 -*-
# https://en.scratch-wiki.info/wiki/Communicating_to_Scratch_via_Python
import socket

HOST = 'localhost'
PORT = 42001

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.connect((HOST, PORT))

def sendCMD(cmd):
    sock.send(len(cmd).to_bytes(4, 'big'))
    sock.send(bytes(cmd, 'UTF-8'))

sendCMD('broadcast "Hola des de Python"')