data = [4,3,2,1]
count = 0
for i in range(0, len(data)):
#len(data)代表的是列表的总长度
#取外层函数的第一个值进行循环
    for j in range(i + 1, len(data)):
#把外层循环的第一个值跟所有的内层循环的值比较一遍，并跟换位置，沉低
        count += 1
        if data[j] < data[i]:
            tmp = data[j]
            data[j] = data[i]
            data[i] = tmp

            # count += 1
print(data, "次数是", count)

data = [4,3,2,1]
count = 0
for j in range(1, len(data)):
    # count += 1
    for i in range(len(data)-j):
        count += 1
        if data[i] > data[i + 1]:
            tmp = data[i]
            data[i] = data[i + 1]
            data[i+1] = tmp
print(data)