题解 | #查找组成一个偶数最接近的两个素数#

i =  int(input().rstrip())
list1=[]
set1 = set()
for x in range(1,i+1):
    #if i%x == 0:
    a,b = x,int(i-x)
    tmp = 0
 #       if a<b:
    for n in range(2,b):
        if b%n == 0:
            tmp += 1
            break
    for n in range(2,a):
        if a%n == 0:
            tmp += 1
            break           
    if tmp == 0 and a not in set1:
        list1.append([a,b,abs(b-a)])
        set1.add(a)
        set1.add(b)
n =0
for i in sorted(list1,key = lambda x: x[2])[0]:
    if n<2:
        print(i)
    n+=1

set()类型不能用{}创建；

set添加单个用add，多个用updata