python

#扫描文件
import os
def saomiao(wenjian):
    for i in os.listdir(wenjian):
        i1=os.path.join(wenjian,i)
        if os.path.isfile(i1):
            print(os.path.abspath(i1))
        elif os.path.isdir(i1):
            saomiao(i1)
        else:
            pass
saomiao("D:\\ak")

#回文素数
def sushu(num):
    for i in range(2,num):
        if num % i == 0:
            break
    else:
        return num


def huiwenshu(num):
    ls = []
    if str(num) == str(num)[::-1]:
        ls.append(num)
    return ls


num = 2
ls = []
while len(ls)<100:
    if sushu(num) and huiwenshu(num):
            ls.append(num)
    num +=1
print(ls)

# 制作一个可以计算三角形面积的函数
def isValid(side1, side2, side3):
    if side1 + side2 >= side3 and side2 + side3 >= side1 and side3 + side1 >= side2:
        num = [side1, side2, side3]
        for i in range(0, -1):
            for j in range(0, len(num) - 1):
                if num[j] >= num[j + 1]:
                    num[j], num[j + 1] = num[j + 1], num[j]
        a = num[0]
        b = num[1]
        print("Theareaofthetrianglei:", a * b / 2)
    else:
        print("Input isinvalid")


a, b, c = eval(input("请填写三角形的三个边的长度用逗号隔开"))
isValid(a, b, c)