Python的十二道编程题，码住战胜一切

一、计算文件大小

import os
def get_size(path):
    size = 0
    l = [path]
    while l:
        path = l.pop()
        lst = os.listdir(path)
        for name in lst:
            son_path = os.path.join(path,name)
            if os.path.isfile(son_path):
                size += os.path.getsize(son_path)
            else:
                l.append(son_path)
    return size

size = get_size(r'D:\s14\算法')
print(size)

二、三级菜单

l = [menu]
while l:
    for k in l[-1]:
        print(k)
    key = input('>>>')
    if key.upper() == 'B':
        l.pop()
    elif key.upper() == 'Q':
        l.clear()
    elif l[-1].get(key):
        l.append(l[-1][key])

三、文件监听

def func():
    with open('test.txt', 'r+', encoding='utf-8') as f:
        while 1:
            lens = f.readline()
            if lens:
                yield lens
t = func()
for j in t:
    print(j)

四、发红包

import random

def rea_pac(money,num):
    ret = random.sample(range(1,money*100),num-1)
    print(ret)
    ret.sort()
    ret.insert(0,0)
    ret.append(money*100)
    for i in range(len(ret)-1):
        value = ret[i+1] - ret[i]
        yield value/100
g = rea_pac(200,10)
for i in g:
    print(i)

五、递归问路

lis = ['alex','wusir','yuanhao','linhaifeng','henry']

def inner(name):
    if len(name) == 0:
        return '没有找到路'
    res = lis.pop(0)
    if res == 'henry':
        return '%s说:我知道老男孩就在沙河地铁站附近'%res
    print('hi美男%s敢问路在何方'%res)
    print('%s回答道,我也不知道,我帮你问问%s'%(res,lis))
    f = inner(lis)
    return f
print(inner(lis))

找到路后会把结果返回给上一个调用者’linhaifeng’
‘linhaifeng’会把结果返回给上一个调用者’yuanhao’…
最终会把结果返回给最开始的调用者inner

六、人狗大战

import random
import time

定义一个人的类

class Person:
    # 定义人的静态属性
    def __init__(self,name,hp,ad,sex):
        self.name = name
        self.ad = ad
        self.hp = hp
        self.sex = sex
    # 定义人的方法
    def da(self,dog):
        yy = random.randint(1,self.ad)
        dog.hp -= yy
        print('%s使用%s,打了%s,%s掉了%s点血'%(self.name,arms.name,dog.name,dog.name,yy))
        if dog.hp < 50:
            print("{}使用终极必杀技{}".format(dog.name,arms.skill()))

定义一个狗的类

class Dog:
    # 定义狗的静态属性
    def __init__(self,name,hp,ad,kind):
        self.name = name
        self.hp = hp
        self.ad = ad
        self.kind = kind
    # 定义狗的方法
    def yao(self,person):
        uu = random.randint(1,self.ad)
        person.hp -= uu
        print('%s咬了%s,%s掉了%s点血' % (self.name, person.name, person.name,uu))
        if person.hp < 50:
            print("{}使用终极必杀技{}".format(person.name,arms.skill()))

定义一个武器类

class Arms:
    def __init__(self,name,hp,ad):
        self.name = name
        self.hp = hp
        self.ad = ad
    # 定义一个武器的技能
    def skill(self):
        li = ['飞龙在天','乾坤大挪移','九阳神功']
        f = random.choice(li)
        return f
arms = Arms('铁锹',3000,2000)
henry = Person('henry',500,30,'男')
dog = Dog('大黄',300,30,'哈士奇')
c = 1
while dog.hp > 0:

    print('第{}回合'.format(c))
    dog.yao(henry)
    henry.da(dog)
    time.sleep(1)
    c +=1

七、计算器

import re
express = '1-2*((60-30+(9-2*5/3+7/3*99/4*2998+10*568/14)*(-40/5))-(-4*3)/(16-3*2))'
express = express.replace(' ','')

计算

def cout(exp):
    if '*' in exp:
        a,b = exp.split('*')
        return str(float(a) * float(b))
    else:
        a, b = exp.split('/')
        return str(float(a) / float(b))

表达式的符号管理把++变成+,–变成-,±变成-,-+变成-

def format_exp(exp):
    exp = exp.replace('++','+')
    exp = exp.replace('+-','-')
    exp = exp.replace('--','+')
    exp = exp.replace('-+','-')
    return exp

计算所有的乘除法

def cal_no(res):
    while True:
        chengshu = re.search('\d+\.?\d*[*/]-?\d+\.?\d*', res)  # (9-2*5/3+7/3*99/4*2998+10*568/14)
        if chengshu:
            ret = chengshu.group()  # 2*5
            resut = cout(ret)  # 得到乘除法的计算结果 10.0
            # 将2*5替换成10.0
            res = res.replace(ret, resut)  # (9-10.0/3+7/3*99/4*2998+10*568/14)
        else:break
    print(res)  # (9-3.3333333333333335+173134.50000000003+405.7142857142857)
    # 表达式的符号管理把++变成+,--变成-,+-变成-,-+变成-
    res1 = format_exp(res) # 将替换后的结果从新赋值给res
    # 将括号内的加减法都匹配出来
    res_lis = re.findall('[-+]?\d+(?:\.\d+)?',res1)
    print(res_lis)  # ['9', '-3.3333333333333335', '+173134.50000000003', '+405.7142857142857']
    sum_n = 0
    for i in res_lis:
        sum_n += float(i)
    return sum_n
def remove_bracket(express):
    while True:

提取表达式最里层的括号

        exp = re.search('\([^()]+\)',express)
        if exp:
            res = exp.group()  # (9-2*5/3+7/3*99/4*2998+10*568/14)
            rep = cal_no(res)  # 173545.88095238098
            print(rep)
            express = express.replace(res,str(rep)) # 因为rep的结果是一个数字
            print(express) # 1-2*((60-30+173545.88095238098*(-40/5))-(-4*3)/(16-3*2))
        else:break
    return express  # 括号内的表达式全部计算完成1-2*-1388338.2476190478
ret = remove_bracket(express)
print(cal_no(re

八、校验文件的一致性

# import os
# import hashlib
# def file_md5(path):
#     filesize = os.path.getsize(path)
#     md5 = hashlib.md5()
#     with open(path,'rb') as f:
#         while filesize >= 4096:
#             content = f.read(4096)
#             md5.update(content)
#             filesize -= 4096
#         else:
#             content = f.read(filesize)
#             if content:
#                 md5.update(content)
#     return md5.hexdigest()
#
# def cmp_file(path1,path2):
#     return file_md5(path1) == file_md5(path2)
# path1 = r'D:\s20\day18\视频\4.面向对象整理.mp4'
# path2 = r'D:\s20\day18\视频\tmp.mp4'
# ret = cmp_file(path1,path2)
# print(ret)

九、打印九九乘法表

for i in range(1,10):
    for j in range(1,i+1):
        print("%s*%s=%s"%(i,j,i*j),end=' ')
    print()


for i in range(1,10):
    for j in range(i,10):
        print("%s*%s=%s"%(i,j,i*j),end=' ')
    print()

十、购物车作业

创建一个名为‘购买账单的txt文件

goods = []
money = input('请充值充值金额').strip()
with open('商品信息',encoding='utf-8')as f:
    for i in f:
       xinxi = i.strip().split(' ')
       if xinxi[0] == 'name':
           continue
       else:
           dic = dict([('name',xinxi[0]),('price',xinxi[1])])
           goods.append(dic)
print(goods)
"""
页面显示 序号 + 商品名称 + 商品价格
"""
a = 1
for v in goods:
    print(a,v['name'],v['price'])
    a += 1
print('n 购物车结算')
print('q 或 Q 退出')
shop_dic = {}
sum = 0
a = 1
dic = {}
balance = 0
while 1:
    shuru = input('请输入序号').strip()
    if shuru.isdigit() and (0 < int(shuru) <= len(goods)):
        print(goods[int(shuru)-1]['name'],goods[int(shuru)-1]['price'])

购物车添加商品名称和价格和数量

        shop_dic.setdefault(goods[int(shuru)-1]['name'],{'price':goods[int(shuru)-1]['price'],'amount':0})

增加商品数量

        shop_dic[goods[int(shuru)-1]['name']]['amount'] += 1
    elif shuru == 'n':
        for k,j in shop_dic.items():
            # python学习交流群：309488165
            # 展示购物车商品名称价格数量
            print(a,k,j['price'],j['amount'])

带序号和商品名称的字典

            dic[a] = k
            a += 1
            sum += int(j['price'])*int(j['amount'])
        if int(money) >= sum:
            print('结算成功')
            balance = int(money)-sum
            for s, b in shop_dic.items():
                print(s, b['price'], b['amount'])
            print('共计消费{}元，剩余金额{}元'.format(sum, balance))
            break
        while int(money) < sum:
            print('余额不足')
            shanchu = input('请输入要删除的商品序号')

用户选择删除购物车里的商品则在购物车里将数量减一

            shop_dic[dic[int(shanchu)]]['amount'] -= 1
            sum = sum - int(shop_dic[dic[int(shanchu)]]['price'])
        else:
            print('结算成功')
            balance = int(money) - sum
            for s, b in shop_dic.items():
                print(s, b['price'], b['amount'])
            print('共计消费{}元，剩余金额{}元'.format(sum, balance))
            break
    elif shuru.upper() == 'Q':
            print('程序退出')
            break
    else:
        print('输入有误请重新输入')
with open('购买账单',encoding='utf-8',mode='w') as f1:
    for s, b in shop_dic.items():
        f1.write('商品名称:{} '.format(s))
        f1.write('单价:{} '.format(b['price']))
        f1.write('数量:{}\n'.format(str(b['amount'])))
    f1.write('共计消费{}元\n'.format(sum))
    f1.write('剩余金额%s元'%(balance))

十一、博客园登录

创建一个log和register文件

import time
dic = {
    1: '请登录',
    2: '请注册',
    3: '文章页面',
    4: '日记页面',
    5: '评论页面',
    6: '收藏页面',
    7: '退出程序',
}
def Home_display():
    """

首页展示

    :return:
    """
    print('欢迎来到博客园首页！！！')
    for i in dic:
        print(i,dic[i])
Home_display()
def ster():
    """

用户注册函数,将用户名,密码写入文件

    :return:
    """
    user_name = input('请填写注册名称').strip()
    pass_word = input('请填写注册密码').strip()
    with open('register','a+',encoding='utf-8') as f1:
        f1.write('{},{}'.format(user_name,pass_word)+'\n')
        print('注册成功,请登录！！！')

def login_system():
    """

登录函数

    :return:
    """
    user_name = []
    time = 3
    with open('register', 'r+', encoding='utf-8') as f:
        for i in f:
            user_name.append(i.strip())
        while time >= 1:
            name = input('请输入用户名')
            wd = input('请输入密码')
            l = name + ',' + wd
            if l in user_name:
                print('登录成功')
                chioce(name)
            else:
                time -= 1
                if time == 0:
                    print('登录次数超出限制,请您注册后登录！')
                    break
                print('用户名或密码错误,剩余{}次机会'.format(time))

def eixt_procedure():
    """

退出程序

    :return:
    """
    print('程序退出,欢迎下次光临')
    exit()

def log(n,func):
    with open('log','a+',encoding='utf-8') as f2:
        current_time = time.strftime("%Y-%m-%d-%X",time.localtime())
        f2.write('{}:{}调用了{}函数'.format(n,current_time,func) + '\n')

def diary(n):
    """

日记页面

    :return:
    """
    print('欢迎{}访问日记页面'.format(n))
    log(n, 'diary')
def comment(n):
    """

评论页面

    :return:
    """
    print('欢迎{}访问评论页面'.format(n))
    log(n, 'comment')
def Collection(n):
    """

收藏页面

    :return:
    """
    print('欢迎{}访问收藏页面'.format(n))
    log(n, 'Collection')
def Article(n):
    """

文章页面

    :return:
    """
    print('欢迎{}访问文章页面'.format(n))
    log(n, 'Article')
lis = [login_system,ster,Article,diary,comment,Collection,eixt_procedure,log]
def chioce(a):
    """

用户选择函数

    :return:
    """
    while 1:
        number = input('请选择页面:').strip()
        if number.isdigit() and 3 <= int(number) <= 6:
            lis[int(number)-1](a)
        # 不可以输入字母
        elif number.isdigit() and (int(number) ==1 or int(number)==7):
            if int(number)==7:
                eixt_procedure()
            lis[int(number) - 1]()
        else:
            print('请输入正确页面选项:')
def chioce1():
    while 1:
        number = input('请选择登录或注册或退出').strip()
        if number.isdigit() and (1 == int(number) or int(number) == 7 or int(number) == 2) :
            if int(number) == 7:
                eixt_procedure()
            else:
                lis[int(number)-1]()
        else:
            print('输入有误请重新输入')
chioce1()

十二、学生选课系统

创建course_file，test.log，vip_admin 文件

import hashlib
import pickle
import os
import logging

logger = logging.getLogger()

创建一个handler，用于写入日志文件

fh = logging.FileHandler('test.log',encoding='utf-8')

再创建一个handler，用于输出到控制台

# ch = logging.StreamHandler()
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
fh.setFormatter(formatter)
# ch.setFormatter(formatter)
logger.addHandler(fh) #logger对象可以添加多个fh和ch对象
# logger.addHandler(ch)
logger.setLevel(logging.DEBUG)

# python学习交流群：309488165
# 密码加密
def md5_user(username,password):
    md5 = hashlib.md5(username.encode('utf-8'))
    md5.update(password.encode('utf-8'))
    return md5.hexdigest()

读取文件

def read_file_name(file_name):
    with open(file_name,'rb') as f:
        while True:
            try:
                res = pickle.load(f)
                if res:
                    yield res
            except EOFError:
                break

写文件

def add_file(file_name,content):
    with open(file_name,'ab') as f:
        pickle.dump(content,f)

创建课程类

class Course:
    def __init__(self,name,price,period,teacher):
        self.name = name
        self.price = price
        self.period = period
        self.teacher = teacher

    def __str__(self):
        return format('\t课程：' + self.name,'<13') + format('价钱：' + self.price,'<13') + format('周期：' + self.period,'<13') + format('老师：' + self.teacher,'<13')
class Admin:
    msg = [('创建课程', 'course'),
            ('创建学生和学生账号', 'account_num'),
            ('查看所有课程', 'view_courses'),
            ('查看所有学生', 'look_all_student'),
            ('查看所有学生的选课情况', 'look_all_courses'),
            ('退出程序', 'quit')]

实例化出一个管理员

    def __init__(self,username,password,identify='Admin'):
        self.username = username
        self.password = password
        self.identify = identify

创建课程

    def course(self):
        student_name = input('请输入课程名称')
        student_pricce = input('请输入课程价钱')
        student_period = input('请输入课程周期')
        student_teacher = input('请输入授课老师')
        Course1 = Course(student_name,student_pricce,student_period,student_teacher)
        add_file('course_file', Course1)
        return True

创建学生和学生账号

    def account_num(self):
        username = input('请输入要创建的姓名')
        password = input('请输入要创建的密码')
        student1 = Student(username,md5_user(username,password))
        add_file('vip_admin', student1)
        return True

查看所有课程

    def view_courses(self):
        ret = read_file_name('course_file')
        for index,i in enumerate(ret,1):
            print(index,i)   # 因为用__str__所以直接打印对象名直接可以打印他的return值
        return True

查看所有学生

    def look_all_student(self):
        ret = read_file_name('vip_admin')
        for i in ret:
            if i.identify == 'Student':
                print(i.username,i.password)
        return True

查看所有学生的选课情况

    def look_all_courses(self):
        ret = read_file_name('vip_admin')
        for i in ret:
            if i.identify == 'Student':
                print(i.username)
                for j in i.course:
                    print(j)
        return True

退出程序

    def quit(self):
        print('程序退出')
        logger.info(self.username + '——' + self.msg[-1][0])
        exit()

实例化一个alex密码123的管理员

# alex = Admin('alex',md5_user('alex','123'))
# def write_file_name():
#     with open('vip_admin','wb') as f:
#         pickle.dump(alex,f)
# write_file_name()
class Student:
    msg = [('查看所有课程', 'look_all_course'),
            ('选择课程', 'choice_course'),
            ('查看所选课程', 'look_choice_course'),
            ('退出程序', 'quit')]
    def __init__(self,username,password,identify = 'Student'):
        self.username = username
        self.password = password
        self.identify = identify
        self.course = []

    def look_all_course(self):
        ret = read_file_name('course_file')
        for index, i in enumerate(ret, 1):
            print(index, i)
        return True
    def choice_course(self):
        ret = list(read_file_name('course_file'))
        # print(ret)
        for index, i in enumerate(ret, 1):
            print(index, i)
        while True:
            choice = input('请选择课程>>>:').strip()
            if choice.isdigit() and int(choice) in range(1,len(ret) +1 ):
                print(ret[int(choice)-1].name)
                print([i.name for i in self.course])
                if ret[int(choice)-1].name not in [i.name for i in self.course]:
                    self.course.append(ret[int(choice)-1])
                    with open('vip_admin','rb') as f1,open('vip_admin2','wb') as f2:
                        while True:
                            try:
                                res1 = pickle.load(f1)
                                if res1.username == self.username:
                                    res1.course.append(ret[int(choice)-1])
                                    pickle.dump(res1,f2)
                                else:
                                    pickle.dump(res1, f2)
                            except EOFError:break
                    os.remove('vip_admin')
                    os.rename('vip_admin2','vip_admin')
                    logger.info(self.username + '——' + self.msg[1][0]+ str(ret[int(choice)-1])) # ?????
                    break
                else:
                    print('该课程您已选择')
                    break
            else:
                print('输入有误重新输入')
    def look_choice_course(self):
        ret = read_file_name('vip_admin')
        for i in ret:
            if i.username == self.username:
                for j in i.course:
                    print(j)
        return True
    def quit(self):
        logger.info(self.username + '——' + self.msg[-1][0])
        exit()

登录验证

def login(username,password):
    ret = read_file_name('vip_admin')
    for i in ret:
        # print(i.username)
        if i.username == username and i.password == md5_user(username,password):
            return i

    else:return False

def auth():
    lis = ['登录','退出']
    while True:
        for index,opt in enumerate(lis,1):
            print(index,opt)
        num = input('请输入你要操作的内容')
        if num.isdigit() and int(num) in range(1,len(lis)+1):
            if num == '1':
                username = input('请输入用户名')
                password = input('请输入密码')
                ret = login(username,password)
                if ret:
                    print('登录成功')
                    logger.info(username + '——' + '登录成功')
                    return ret
                else:
                    print('登录失败')
            elif num == '2':
                exit()
        else:
            print('您输入的序号有误请重新输入')

主函数

def main():
    ret = auth()
    # if hasattr(sys.modules[__name__],ret['identify']):
    #     cls = getattr(sys.modules[__name__],ret['identify']) # ???????
    #     # print(sys.modules[__name__]) # <module '__main__' from 'D:/PycharmProjects/s20/大作业/Thursday/学生选课系统升级版/选课系统升级版.py'>
    #     obj = cls(ret['username'],ret['password'])
    if ret:
        # print(ret)
        obj = ret
        # print(obj)
        while True:
            for index,i in  enumerate(obj.msg,1):
                print(index,i[0])
            choice = input('请选择序号')
            if choice.isdigit() and int(choice) in range(1,len(obj.msg) + 1):
                if hasattr(obj,obj.msg[int(choice) - 1][1]):
                    if callable(getattr(obj,obj.msg[int(choice) - 1][1])):
                        ret = getattr(obj, obj.msg[int(choice) - 1][1])()
                        if ret:
                            logger.info(obj.username+'——'+obj.msg[int(choice) - 1][0])
            else:
                print('您输入的序号有误,请重新输入')
main()

最后

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希望我们可以一起学习，一起进步~