现实应用实例

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1、购物车

c=[]sum=0a=[    {"name":"电脑","price":1000},    {"name":"鼠标","price":2000},    {"name":"优盘","price":3000},    {"name":"硬盘","price":4000},    {"name":"音响","price":5000}]for i in a:    print(i["name"],i["price"])b=int(input("请输入总资产:"))while True:    d=input("请输入需要购买的商品名称(输入y退出):")    if d=="y":        break    for j in a:        if d==j["name"]:            c.append([j["name"],j["price"]])for k in c:    sum=sum+k[1]print(c)print("总价格:",sum)if sum>b:    print("余额不足,请充值")    x = input("y:充值,n:退出")    if x=="n":        print("欢迎下次光临")    if x=="y":        while True:            p=int(input("请输入充值金额:"))            b=b+p            print("恭喜充值成功    余额:",b,"结算金额:",b-sum)            s=input("是否结算? 结算:1  继续充值:2    :")            if s=="1":                if sum>b:                    print("金额不足,请继续充值")                if sum<b:                    print("购物成功,欢迎下次光临")                    break            if s=="2":                continueelse:    print("购物成功")

 2、验证码

import random                          #导入random模块temp=""                                #定义一个空字符串,为后面拼接用for i in range(4):                    #循环四次,生成四位的验证码    j=random.randrange(5)             #随机生成一个数    if j==3 or j==1:                 #如果生成1或3的话就让第一位为数字        b=random.randrange(0,9)        temp=temp+str(b)             #生成的整数必须转成字符串类型进行拼接    else:        a=random.randrange(65,90)        temp=temp+chr(a)print(temp)

 3、三级联动

dict= {    "东北":{        "吉林省":{            "吉林市":['吉林市1','吉林市2'],            "长春":['长春1','长春2'],},        "辽宁省":{            "沈阳":['沈阳1','沈阳2','沈阳3'],            "大连":['大连1','大连2'],                },            },    '华北':{        '河北省':{            '廊坊':['廊坊1','廊坊2'],            '保定':['保定1','保定2'],                },        '内蒙古':{            '呼和浩特':['呼和浩特1','呼和浩特2','呼和浩特3'],            '包头':['包头1','包头2']                },        },    }for i in dict:    print(i)a=input("请输入所要进入的地区:")for o in dict[a]:    print(o)b=input("请输入要进入的省:")for p in dict[a][b]:    print(p)c=input("请输入所要进入的市:")for l in dict[a][b][c]:    print(l)

 4、账号注册登录

def login(a,b):    """    用于用户名和密码的验证    :param a: 用户名    :param b: 密码    :return:Ture  用户验证成功   False  用户验证失败    """    c=open("334.txt","r",encoding="utf-8")    for line in c:        line=line.strip()          #默认strip无参数用于去除换行符和空格        new_line=line.split("*")    #有参数,移除两端指定的值        if new_line[0]==a and new_line[1]==b:            return True    return Falsedef yanzheng(a):    """    用于验证用户名是否存在    :param a: 用户名    :return: True  用户名存在    """    c=open("334.txt","r",encoding="utf-8")    for line in c:        line=line.strip()          #默认strip无参数用于去除换行符和空格        new_line=line.split("*")    #有参数,移除两端指定的值        if new_line[0] ==a:            return Truedef zhuche(a,b):    """    用于用户注册    :param a: 用户名    :param b: 密码    :return: True   注册成功    """    c = open("334.txt", "a", encoding="utf-8")    temp="\n"+ a + "*" + b    c.write(temp)    return Truedef min():    print("欢迎登录英雄联盟官网")    m=input("登录:1;注册:2")    if m=="1":        f1=input("请输入用户名:")        f2=input("请输入密码:")        f3 = login(f1, f2)        if f3:            print("登录成功")        else:            print("登录失败")    elif m=="2":        f1=input("请输入用户名:")        f2=input("请输入密码:")        f4=yanzheng(f1)        if f4:            print("用户名已存在")        else:            f5=zhuche(f1,f2)            if f5:                print("恭喜注册成功")min()

 计算器

复制代码
import redef f1(a):    a = re.sub(" ","",a)    a = a.replace('--', '+').replace('++', '+').replace('-+', '-').replace('+-', '-')    if "*" in a or "/" in a:        while True:            b = re.split("([\-]?\d+[.]?\d*[/*][\-]?\d+[.]?\d*)",a,1)            if len(b) == 3:                c = re.split("([/*])",b[1])                if c[1]== "*":                    d = float(c[0])*float(c[2])                    a = b[0]+str(d)+b[2]                else:                    d = float(c[0])/float(c[2])                    a = b[0]+str(d)+b[2]            else:                e = re.findall("[\-+]?\d+\.?\d*", a)                sun = 0                for i in e:                    sun = sun + float(i)                return sun    else:        e = re.findall("[\-+]?\d+\.?\d*", a)        sun = 0        for i in e:            sun = sun + float(i)        return sundef f2(a):    a = re.sub(" ", "", a)    if "*" in a or "/" in a:        while True:            a = a.replace('--', '+').replace('++', '+').replace('-+', '-').replace('+-', '-')            b = re.split("(\d+[.]?\d*[/*][\-]?\d+[.]?\d*)", a, 1)            if len(b) == 3:                c = re.split("([/*])", b[1])                if c[1] == "*":                    d = float(c[0]) * float(c[2])                    a = b[0] + str(d) + b[2]                else:                    d = float(c[0]) / float(c[2])                    a = b[0] + str(d) + b[2]            else:                e = re.findall("[\-+]?\d+\.?\d*", a)                sun = 0                for i in e:                    sun = sun + float(i)                return sun    else:        e = re.findall("[\-+]?\d+\.?\d*", a)        sun = 0        for i in e:            sun = sun + float(i)        return sunwhile True:    r=re.split("\(([^()]+)\)",a,1)    if len(r)==3:        m=f1(r[1])        a=r[0]+str(m)+r[2]        print(a)    else:        r=f2(a)        print(r)        breakprint(eval(a))
复制代码

 验证码

方法一

import randomli=[]for i in range(6):    a=random.randrange(0,9)    if a==2 or a==6:        b=random.randrange(0,9)        li.append(str(b))    else:        b=random.randrange(65,90)        li.append(chr(b))print("".join(li))

 游戏

import randomimport timeimport sysdef outer(func):    def f(n):        print("* ☆∵▁▂▄▂▁★∵∴☆★∵∴\n∴★◢█████◣ * ☆∴★∵★ * ☆\n☆◢████☆██◣∴    天气冷了,☆\n◢■◤█████◥█◣送你一件毛衣, * ★\n◥◤  █████◥◤∵小心别著凉了\n\t  █████\n\t  █████")        r = func(n)        return r    return ffor i in range(31):    time.sleep(0.2)    sys.stdout.write("\r")    sys.stdout.write("%s %% |%s"%(int((i/30)*100),i*"██"))    sys.stdout.flush()print("\n\t\t欢迎来到英雄联盟PK擂台")print("剑圣\t\t石头\t\t亚索\t\t瑞文\t\t薇恩\t\t老鼠\n卡牌\t\t劫\t\t剑姬\t\t安妮\t\t龙王\t\t女枪\n男枪\t\t螳螂\t\t蛮王\t\tEZ\t\t金克斯")opp = input("请选择战斗的英雄1:")odd = input("请选择战斗的英雄2:")occ = input("确定:Y   重选:N")class Swordman:    def __init__(self,name):        self.blood = 2000        self.Name = name    @outer    def Q(self):        self.blood = self.blood - 100        print("霸道的%s使用地震碎片技能,%s受到100点伤害,当前血量:%s"%(opp,odd,self.blood))    @outer    def W(self):        self.blood = self.blood + 200        print("%s得到200点血量,当前血量:%s"%(odd,self.blood))    @outer    def E(self):        self.blood = self.blood - 150        print("霸道的%s使用野蛮打击技能,%s受到150点伤害,当前血量:%s"%(opp,odd,self.blood))    @outer    def R(self):        self.blood = self.blood - 300        print("霸道的%s使用势不可挡技能,%s受到300点攻击,当前血量:%s"%(opp,odd,self.blood))class Rock:    def __init__(self,name):        self.blood = 3000        self.Name = name    @outer    def Q(self):        self.blood = self.blood - 150        print("%s受到150点攻击,当前血量:%s" %(odd,self.blood))    @outer    def W(self):        self.blood = self.blood - 120        print("%s受到120点攻击,当前血量:%s" %(odd,self.blood))    @outer    def E(self):        self.blood = self.blood - 110        print("石头受到110点攻击,当前血量:%s" % self.blood)    @outer    def R(self):        self.blood = self.blood - 250        print("%s受到250点攻击,当前血量:%s" %(odd,self.blood))obj1 = Swordman(opp)obj2 = Rock(odd)print(" %s\n     血量:%s\n     Q攻击:%s\n     W攻击:%s\n     E攻击:%s\n     R攻击:%s\n"%(opp,obj1.blood,150,120,110,250))print(" %s\n     血量:%s\n     Q攻击:%s\n     W攻击:%s\n     E攻击:%s\n     R攻击:%s\n"%(odd,obj2.blood,100,200,150,300))while True:    time.sleep(0.5)    ret=random.randrange(9)    if ret == 1 or ret == 3 or ret == 5 or ret == 7:        tump = random.randrange(9)        if tump == 1 or tump == 2:            obj1.Q()        elif tump == 3 or tump == 4:            obj1.W()        elif tump == 5 or tump == 6:            obj1.E()        else:            obj1.R()    else:        att = random.randrange(9)        if att == 1 or att == 2:            obj2.Q()        elif att == 3 or att == 4:            obj2.W()        elif att == 5 or att == 6:            obj2.E()        else:            obj2.R()    if obj1.blood < 0:        print("%sKO%s"%(opp,odd))        break    elif obj2.blood < 0:        print("%sKO%s"%(odd,opp))        break

 轮播图

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