input: Write a function to reverse a list.
  def reverse_list(input_list):
      return input_list[::-1]
  assert reverse_list([1,2,3,4,5])==[5,4,3,2,1]
  assert reverse_list(["a","b","c"])==["c","b","a"]
  assert reverse_list([])==[]
  assert reverse_list([1])==[1]
output: def reverse_list(input_list):
      return input_list[::-1]