给定一个数组 按重复次数 降序排列输出 数组非空且为正整数【杭州多测师】【杭州多测师_王sir】

 

 

a=[1,1,1,2,2,2,2,6,5,5,5,5]
num=[]

for i in a:
    s = a.count(i)
    num.append(s)

num1 = sorted(num,reverse=True)
num2=list(set(num1))
num2.sort(key=num1.index)
num3=[]

for x in num2:
    for i in a:
        if x ==a.count(i):
            num3.append(i)
        else:
            pass
num4=[]
for j in num3:
    if j not in num4:
        num4.append(j)
print(num4)