前言
大家早好、午好、晚好吖 ❤ ~欢迎光临本文章
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
# python学习交流群：261823976
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:
# python学习交流群：261823976
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：261823976
# 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()
尾语 💝
好了，今天的分享就差不多到这里了！
文章提供的十二道编程题，大家都可以自己研究研究，有不理解的地方也是可以点击文章名片领取解答和大量的学习资料以及部分案例的源码哦
对下一篇大家想看什么，可在评论区留言哦！看到我会更新哒(ง •_•)ง
喜欢就关注一下博主，或点赞收藏评论一下我的文章叭！！！
