input: Write a function to shuffle a given list using Python's built-in random module. The function should return the shuffled list.
  assert shuffle_list([1, 2, 3, 4, 5]) != [1, 2, 3, 4, 5]
  assert shuffle_list([]) == []
output: import random
  
  def shuffle_list(lst):
      random.shuffle(lst)
      return lst