input: Write a function to shuffle a list of numbers using the `random` module. The function should return the shuffled list. If the input list is empty, it should return an empty list.
  
  
  import random
  
  def shuffle_list(nums):
      if not nums:
          return []
      random.shuffle(nums)
      return nums
  
  assert shuffle_list([1, 2, 3, 4, 5]) in [[1, 2, 3, 4, 5], [1, 2, 3, 5, 4], [1, 2, 4, 3, 5], [1, 2, 4, 5, 3], [1, 2, 5, 3, 4], [1, 2, 5, 4, 3], [1, 3, 2, 4, 5], [1, 3, 2, 5, 4], [1, 3, 4, 2, 5], [1, 3, 4, 5, 2], [1, 3, 5, 2, 4], [1, 3, 5, 4, 2], [1, 4, 2, 3, 5], [1, 4, 2, 5, 3], [1, 4, 3, 2, 5], [1, 4, 3, 5, 2], [1, 4, 5, 2, 3], [1, 4, 5, 3, 2], [1, 5, 2, 3, 4], [1, 5, 2, 4, 3], [1, 5, 3, 2, 4], [1, 5, 3, 4, 2], [1, 5, 4, 2, 3], [1, 5, 4, 3, 2], [2, 1, 3, 4, 5], [2, 1, 3, 5, 4], [2, 1, 4, 3, 5], [2, 1, 4, 5, 3], [2, 1, 5, 3, 4], [2, 1, 5, 4, 3], [2, 3, 1, 4, 5], [2, 3, 1, 5, 4], [2, 3, 4, 1, 5], [2, 3, 4, 5, 1], [2, 3, 5, 1, 4], [2, 3, 5, 4, 1], [2, 4, 1, 3, 5], [2, 4, 1, 5, 3], [2, 4, 3, 1, 5], [2, 4, 3, 5, 1], [2, 4, 5, 1, 3], [2, 4, 5, 3, 1], [2, 5, 1, 3, 4], [2, 5, 1, 4, 3], [2, 5, 3, 1, 4], [2, 5, 3, 4, 1], [2, 5, 4, 1, 3], [2, 5, 4, 3, 1], [3, 1, 2, 4, 5], [3, 1, 2, 5, 4], [3, 1, 4, 2, 5], [3, 1, 4, 5, 2], [3, 1, 5, 2, 4], [3, 1, 5, 4, 2], [3, 2, 1, 4, 5], [3, 2, 1, 5, 4], [3, 2, 4, 1, 5], [3, 2, 4, 5, 1], [3, 2, 5, 1, 4], [3, 2, 5, 4, 1], [3, 4, 1, 2, 5], [3, 4, 1, 5, 2], [3, 4, 2, 1, 5], [3, 4, 2, 5, 1], [3, 4, 5, 1, 2], [3, 4, 5, 2, 1], [3, 5, 1, 2, 4], [3, 5, 1, 4, 2], [3, 5, 2, 1, 4], [3, 5, 2, 4, 1], [3, 5, 4, 1, 2], [3, 5, 4, 2, 1], [4, 1, 2, 3, 5], [4, 1, 2, 5, 3], [4, 1, 3, 2, 5], [4, 1, 3, 5, 2], [4, 1, 5, 2, 3], [4, 1, 5, 3, 2], [4, 2, 1, 3, 5], [4, 2, 1, 5, 3], [4, 2, 3, 1, 5], [4, 2, 3, 5, 1], [4, 2, 5, 1, 3], [4, 2, 5, 3, 1], [4, 3, 1, 2, 5], [4, 3, 1, 5, 2], [4, 3, 2, 1, 5], [4, 3, 2, 5, 1], [4, 3, 5, 1, 2], [4, 3, 5, 2, 1], [4, 5, 1, 2, 3], [4, 5, 1, 3, 2], [4, 5, 2, 1, 3], [4, 5, 2, 3, 1], [4, 5, 3, 1, 2], [4, 5, 3, 2, 1], [5, 1, 2, 3, 4], [5, 1, 2, 4, 3], [5, 1, 3, 2, 4], [5, 1, 3, 4, 2], [5, 1, 4, 2, 3], [5, 1, 4, 3, 2], [5, 2, 1, 3, 4], [5, 2, 1, 4, 3], [5, 2, 3, 1, 4], [5, 2, 3, 4, 1], [5, 2, 4, 1, 3], [5, 2, 4, 3, 1], [5, 3, 1, 2, 4], [5, 3, 1, 4, 2], [5, 3, 2, 1, 4], [5, 3, 2, 4, 1], [5, 3, 4, 1, 2], [5, 3, 4, 2, 1], [5, 4, 1, 2, 3], [5, 4, 1, 3, 2], [5, 4, 2, 1, 3], [5, 4, 2, 3, 1], [5, 4, 3, 1, 2], [5, 4, 3, 2, 1]]
  assert shuffle_list([]) == []
  
output: def shuffle_list(nums):
      if not nums:
          return []
      random.shuffle(nums)
      return nums