python3----冒泡排序

 array = [1, 6, 7, 2, 9, 4]
 for i in range(len(array)-1, 1, -1):
     for j in range(0, i):
         if array[j] > array[j+1]:
             array[j], array[j+1] = array[j+1], array[j]
 print(array)

 results:

 [1, 2, 4, 6, 7, 9]