input: Write a function to reverse a given 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([])==[]
  assert reverse_list([-3, -2, -1, 0, 1, 2])==[2, 1, 0, -1, -2, -3]
output: def reverse_list(list): 
      return list[::-1]