input: Write a function to create a Text-to-Speech Python application that reads out a simple sentence provided as input.
  
  assert text_to_speech("Hello, this is a simple sentence")==None
  assert text_to_speech("The quick brown fox jumps over the lazy dog")==None
output: import pyttsx3
  
  def text_to_speech(sentence):
      engine = pyttsx3.init()
      engine.say(sentence)
      engine.runAndWait()