反素数python_反素数python程序pta

import math 
def is_prime(n):
    if n < 2:
        return False     #0和1不是素数
    for i in range(2, int(math.sqrt(n))+1):
        if n % i == 0:
            return False
            break
    else:
        return True
def plalindrome_prime(number):
    if str(number)==str(number)[::-1] and is_prime(number):
        return True
    else:
        return False
def reverse_prime(number):
    for i in range(number):
        if plalindrome_prime(i)==False and is_prime(i)==True and is_prime(int(str(i)[::-1]))==True:
            print(i,end=' ')
positive_int = int(input())         
reverse_prime(positive_int)