input: Write a function to print a random element from a given list. The function should take a list as input and return None, but print a random element from the list.
  import random
  
  assert choose_random(["apple", "banana", "mango", "pear", "grape"]) is None
  assert choose_random(["cat", "dog", "mouse"]) is None
  assert choose_random([]) is None
output: def choose_random(lst):
      if lst:
          print(random.choice(lst))