input: Write a function to create a Text-to-Speech Python application that reads out a simple sentence. The function should take a string input representing the sentence and use the pyttsx3 library to convert the text to speech. 
  
  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
  assert text_to_speech("Python is a versatile programming language")==None
  assert text_to_speech("Artificial intelligence is revolutionizing the world")==None
  assert text_to_speech("")==None
output: import pyttsx3
  
  def text_to_speech(sentence):
      engine = pyttsx3.init()
      engine.say(sentence)
      engine.runAndWait()