input: Write a function that takes a list of strings as input and prints a random element from the list. Return None from the function.
  PrintRandomElement(["apple", "banana", "mango", "pear", "grape"])
  
  assert PrintRandomElement(["apple", "banana", "mango", "pear", "grape"])==None 
  assert PrintRandomElement(["apple"])==None
  assert PrintRandomElement([])==None
output: import random
  
  def PrintRandomElement(lst):
      if lst:
          print(random.choice(lst))
      return None