input: Write a function to sort a given list of words in alphabetical order and print the sorted list. If the input list is empty, print an empty list.
  
  def sort_words(words):
      # Ensure the input is a list
      if not isinstance(words, list):
          print([])
          return
      
      # Sort the list of words in alphabetical order
      words.sort()
  
      # Print the sorted list of words
      print(words)
  
  assert sort_words(['bubble', 'selection', 'quicksort', 'insertion'])==None
  assert sort_words(['apple', 'banana', 'cherry'])==None
  assert sort_words([])==[]
  assert sort_words(None)==[]
output: def sort_words(words):
      if not isinstance(words, list):
          print([])
          return
      words.sort()
      print(words)