请编写程序,由系统随机产生一个正整数 n（1<n<50000），根据菜单提示，选择输出小 于 n 的以下 7 种特殊数据中的一种：（1）完全数，（2）亲密数，（3）水仙花数，（4）阶乘和 数，（5）自守数，（6）孪生素数；直到用户退出系统。

ChitGPT: 好的，这个问题可以通过python代码来解决。以下是一个简单的程序，可以生成小于给定整数n的七种特殊数中的任意一种，并且可以帮助您退出系统。

import math

def isPerfect(n):
    sum = 1
    i = 2
    while i * i <= n:
        if n % i == 0:
            sum += i + n / i
        i += 1
    if sum == n and n != 1:
        return True
    else:
        return False

def isAmicable(a, b):
    if (sumFactors(a) == b and sumFactors(b) == a):
        return True
    else:
        return False

def sumFactors(n):
    sum = 0
    for i in range(1, n):
        if (n % i == 0):
            sum += i
    return sum

def isNarcissistic(n):
    digits = []
    temp = n
    while (temp > 0):
        digits.append(temp % 10)
        temp = temp // 10
    numDigits = len(digits)
    sum = 0
    for i in range(0, numDigits):
        sum += math.pow(digits[i], numDigits)
    if (sum == n):
        return True
    else:
        return False

def isFactorialSum(n):
    i = 1
    sum = 1
    while(sum < n):
        i += 1
        sum *= i
    return True if sum == n else False

def isSelfAdjoint(n):
    strNum = str(n)
    digitCount = len(strNum)
    for i in range(1, digitCount + 1):
        if int(strNum[-i:]) == n:
            return True
    return False

def isTwinPrime(n):
    if isPrime(n) and isPrime(n - 2):
        return True
    elif isPrime(n) and isPrime(n + 2):
        return True
    else:
        return False

def isPrime(n):
    if n <= 1:
        return False
    for i in range(2, int(math.sqrt(n)) + 1):
        if n % i == 0:
            return False
    return True

menu = "请输入您想输出的特殊数：\n1.完全数\n2.亲密数\n3.水仙花数\n4.阶乘和数\n5.自守数\n6.孪生素数\n7.退出程序\n"

while True:
    n = int(input("请输入一个整数n(1<n<50000): "))
    choice = int(input(menu))

    while choice != 7:
        if choice == 1:
            perfectNumbers = []
            for i in range(1, n):
                if (isPerfect(i)):
                    perfectNumbers.append(i)
            print("小于n的完全数有：", perfectNumbers)
        elif choice == 2:
            amicableNumbers = []
            for i in range(1, n):
                for j in range(i + 1, n):
                    if isAmicable(i, j):
                        amicableNumbers.append([i,j])
            print("小于n的亲密数有：", amicableNumbers)
        elif choice == 3:
            narcissisticNumbers = []
            for i in range(1, n):
                if isNarcissistic(i):
                    narcissisticNumbers.append(i)
            print("小于n的水仙花数有：", narcissisticNumbers)
        elif choice == 4:
            factorialSumNumbers = []
            for i in range(1, n):
                if isFactorialSum(i):
                    factorialSumNumbers.append(i)
            print("小于n的阶乘和数有：", factorialSumNumbers)
        elif choice == 5:
            selfAdjointNumbers = []
            for i in range(1, n):
                if isSelfAdjoint(i):
                    selfAdjointNumbers.append(i)
            print("小于n的自守数有：", selfAdjointNumbers)
        elif choice == 6:
            twinPrimeNumbers = []
            for i in range(1, n):
                if isTwinPrime(i):
                    twinPrimeNumbers.append(i)
            print("小于n的孪生素数有：", twinPrimeNumbers)
        else:
            print("输入有误，请重新输入")
        choice = int(input(menu))
    print("程序已退出")

请问您对代码有什么疑问吗？