pyhton>冒泡排序，快排

冒泡排序

a = [9,4,7,2,3,6,1]
for i in range(len(a)):
    for j in range(len(a)-i-1):
        if a[j] > a[j+1]:
            a[j],a[j+1] = a[j+1],a[j]

快速排序

a = [9,4,7,2,3,6,1]
for i in range(len(a)):
    for j in range(len(a)-1):
        if a[i] < a[j]:
            a[i],a[j] = a[j],a[i]