input: Write a python function to shuffle elements in a list.
  assert shuffle_list([1, 2, 3, 4, 5]) != [1, 2, 3, 4, 5]
  assert shuffle_list(['a', 'b', 'c', 'd']) != ['a', 'b', 'c', 'd']
  assert len(shuffle_list([10, 20, 30, 40, 50])) == 5
output: import random
  
  def shuffle_list(lst):
      random.shuffle(lst)
      return lst