input: Write a python function to initialize a text-to-speech engine and make it say a given phrase.
  assert say_phrase("Hello world!") == None
  assert say_phrase("Python is awesome!") == None
  assert say_phrase("Test phrase.") == None
output: def say_phrase(phrase):
      import pyttsx3
      engine = pyttsx3.init()
      engine.say(phrase)
      engine.runAndWait()