Python 实现冒泡

nums = [3,1,2]
n=len(nums)

for i in range(n-1):
    for j in range(n-i-1):
        if nums[j]>nums[j+1]:

            nums[j+1],nums[j]=nums[j],nums[j+1]

print(nums)

[1, 2, 3]