python：打印给定数值以内的所有素数

def Prime_num(num):
    if num <= 1:
        print("请输入大于1的值")
    else:
        for i in range(2,num+1):
            for j in range(2,i):
                if i % j == 0:
                    break
            else:
                print(i)
num = eval(input("请输入数值："))
Prime_num(num)