input: from typing import List
  
  def shuffle_list(lst: List) -> List:
      """Shuffles a given list using the random number generator.
      >>> shuffle_list([1, 2, 3, 4])
      [3, 1, 4, 2]  # This is an example output, actual output may vary
      """
output:     import random
      random.shuffle(lst)
      return lst