Python第五章作业

第1关 回文素

def isprime(n):
    for j in range(2, int(n**(1/2)) + 1):
        if n % j == 0:
            return 0
    return 1
def plalindrome_prime(n):
    n1 = n[::-1]
    if n1 == n:
        return 1
    return 0
x = int(input())
i = 0
n = 2
while (i < x):
    if (isprime(n) and plalindrome_prime(str(n))):
        print(n, end=' ')
        i += 1
    n += 1

第2关 反素数

def is_prime(n):
    for i in range(2,int(n**(1/2)+1)+1):
        if n % i ==0:
            return False
    return True
def reverse_prime(n):
        if is_prime(n) and is_prime(int(str(n)[::-1])) and str(n) !=str(n)[::-1]:
            return True
        else:
            return False
a = int(input())
times = 0
n = 2
while times < a:
    if reverse_prime(n):
        print(n,end = " ")
        times += 1
    n +=1

第3关 哥德巴赫猜想

def is_prime(n):
    """判断素数的函数,接收一个正整数为参数，参数是素数时返回True，否则返回False"""
    # ====================Begin===================================
    # 补充你的代码
    if n < 2:
        return False
    elif n == 2:
        return True
    else:
        a = int(n ** (1 / 2) + 1)
        for i in range(2, a + 1):
            if n % i == 0:
                return False
        else:
            return True
    # ======================End=================================
def goldbach_conjecture(num):
    """ 哥德巴赫猜想, 接收一个不小于4的正整数为参数。
    当参数为不小于4的偶数时，将其分解为两个素数的加和，按小数+数的格式输出。
    有多种组合时全部输出，但不输出重复的组合，例如输出8=3+5，不输出8=5+3。
    参数为奇数或小于4时，输出'Data error!'
    """
    # ====================Begin===================================
    # 补充你的代码
    if 4<=num and num % 2 == 0:
        for i in range(1,num + 1):
            n = num - i
            if is_prime(i) and is_prime(n) and i<=n :
                print(f"{num}={i}+{n}")
    else:
        print('Data error!')
    # ======================End=================================
if __name__ == '__main__':
    positive_even = int(input())  # 输入一个正数
    goldbach_conjecture(positive_even)

第4关 货币转换

a = input()
b = eval(input())
if '$' in a and b>0:
    c = eval(a.replace('$',""))
    print(f"{c*b:.2f}¥")
elif "¥" in a and b>0:
    c = eval(a.replace('¥', ""))
    print(f"{c/b:.2f}$")
else:
    print("Data error!")

第5关 个人信息提取

a = list(map(str,input().split()))
b = []
c=0
for i in a[4]:
    if str.isdigit(i) and c <4:
        b.append(i)
        c+=1
b = ''.join(b)
print("姓名：" + a[1])
print("班级：" + a[2])
print("出生：" + str(b)+"年")

第6关 身份证号基本信息

a = input()
year = a[6:10]
month = a[10:12]
date = a[12:14]
if int(a[16])%2 == 0:
    print(f'出生：{year}年{month}月{date}日')
    print('性别：女')
else:
    print(f'出生：{year}年{month}月{date}日')
    print('性别：男')

第7关 各位数字之和为5的数

a = int(input())
for i in range(a+1):
    s = 0
    for n in str(i):
        s = s + int(n)
    if s == 5:
        print(i, end=" ")

第8关 字符串长度

a = input()
print(len(a))

第9关 字符串加密

import string
def caesar_cipher(text):
    lower = string.ascii_lowercase
    upper = string.ascii_uppercase
    digit = string.digits
    before = lower + upper + digit
    after = lower[3:]+lower[:3] + upper[5:]+upper[:5]+ digit
    result = ''.maketrans(before, after)
    return text.translate(result)
if __name__ == '__main__':
    plaintext = input()
    print(caesar_cipher(plaintext))

第10关 输出单词

a = input()
b = a.split()
for i in b:
    print(i)

第11关 字符大小写转换

import string
def caesar_cipher(text):
    lower = string.ascii_lowercase
    upper = string.ascii_uppercase
    digit = string.digits
    before = lower + upper + digit
    after = upper + lower+ digit
    result = ''.maketrans(before, after)
    return text.translate(result)
if __name__ == '__main__':
    plaintext = input()
    print(caesar_cipher(plaintext))

第12关 查找指定字符

a = input()
b = input()
if a in b:
    print(f'index = {b.index(a)}')
else:
    print("Not Found")

第13关 随机密码生成器

import random
n,s= map(int,input().split(','))
random.seed(s)
i = 0
while i < n:
    i += 1
    print(random.choice('0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&\()*+,-.'),end = "")

第14关 模拟生成微软序列号

import random
n = int(input())
x = int(input())
random.seed(x)
def wrxl():
    list = []
    times = 0
    while times < 5:
        for i in range(5):
            a = random.choice("BCEFGHJKMPQRTVWXY2346789")
            list.append(a)
        list.append('-')
        list1 = map(str,list)
        times += 1
    list2 = ''.join(list1)
    list2 = list2.strip('-')
    return list2
for i in range(n):
    print(wrxl())

第15关 数列求和

A = input()
N = int(input())
if 0 <= N and 1<= int(A) <=9 :
    def slqh(A,N):
        list = []
        for i in range(1,N+1):
            list.append(int(A*i))
        print(sum(list))
    slqh(A,N)
else:
    print('data error')
    

第16关 单词个数

txt = input()
for i in ",.!":
    txt = txt.replace(i, " ")
x1 = txt.split()
print(len(x1))