http://blog.davidvassallo.me/developing-alexa-skills

flask-ask-tv.py

@ask.intent("TVPowerIntent", convert={'power':str})
def sourcetv(power):
    power = power.lower()
    msg = "Sorry! batman did not recognise your command"
    if power == "on":
        subprocess.check_output('echo "on 0" | cec-client RPI -s -d 1', shell=True)
        msg = render_template('confirmed', confirmation="the t.v. is now on")
    elif power == "off":
        subprocess.check_output('echo "standby 0" | cec-client RPI -s -d 1', shell=True)
        msg = render_template('confirmed', confirmation="the t.v. is now off")
    return statement(msg)

@ask.intent("TVSourceIntent", convert={'sourcename':str})
def sourcetv(sourcename):
    print sourcename
    sourcename = sourcename.lower()
    if sourcename == "kodi":
        subprocess.check_output('echo "as" | cec-client RPI -s -d 1', shell=True)
        msg = render_template('confirmed', confirmation="kodi is on t.v.")
    elif sourcename == "satellite":
        subprocess.check_output('echo "tx 1F:82:30:00" | cec-client RPI -s -d 1', shell=True)
        msg = render_template('confirmed', confirmation="telia is on t.v.")
    else:
        msg = render_template('sorry', apologies="batman did not recognise "+sourcename)

    return statement(msg)