Says an English text, with any adjust rate and/or volume

def say(text='This is so cool', rate_adjust=-50, volume_adjust=0):
    '''
    Says an English text, with any adjust rate and/or volume
    '''
    # Adjusts the property
    rate = engine.getProperty('rate')
    engine.setProperty('rate', rate+rate_adjust)
    volume = engine.getProperty('volume')
    engine.setProperty('volume', volume+volume_adjust)

    # Says the text and voila!
    engine.say(text)
    engine.runAndWait()