input: Write a function to reverse a given list. The function should return the reversed list. If the input list is empty, it should return an empty list.
  def reverse_list(list): 
      return list[::-1]
  assert reverse_list([1,2,3,4,5])==[5, 4, 3, 2, 1]
  assert reverse_list([7, 8, 9, 10])==[10, 9, 8, 7]
  assert reverse_list([])==[]
output: def reverse_list(list): 
      return list[::-1]