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]