python练习题-原创 难度从小到中到大~欢迎评论交流

• 编写100以内逢7拍手游戏（含7和7倍数的数用@替换)。

for i in range(1, 101):
     # 把i转成字符串，使用find方法（字符串中不包含时，返回-1）
     include = str(i).find("7")
     # 判断条件：既不包含7，也不是7的倍数
     if include == -1 and int(i) % 7 != 0:
         # 输出，去掉了换行符，加了、
         print(i, end="、")
         # 如果包含7 输出*
     elif include != -1 or int(i) % 7 == 0:
         print("*", end='、')

• 输入100以内整数，5次机会猜此数。

import random
print("猜数字游戏,输入一个1-100以内的数字")
random_num = random.randint(1, 100)
# print(random_num)  # 打开注释可查看生成的随机数
for frequency in range(1,6):
    number = input("请输入一个数字:")
    if number.isdigit() is False:
        print('请输入一个正确的数字')
    elif int(number) < 0 or int(number) > 100:
        print("请输入1-100范围的数字")
    elif random_num == int(number):
        print("恭喜你用了%d次猜对了" % frequency)
        break
    elif random_num > int(number):
        print("很遗憾，你猜小了")
    else:
        print("很遗憾，你猜大了")
    if frequency == 5:
        print("很遗憾，%d次机会已用尽，游戏结束,答案为%d" %
              (frequency, random_num))

• 列表中存放若干商品的价格，输入价格区间上限和下限，输出该区间所有价格。

num = [399, 4369, 539, 288, 109, 749, 235, 190, 99, 1000]
a = int(input("请输入最大价格："))
b = int(input("请输入最小价格："))
c = input('''1.价格降序排序
2.价格升序排序
请选择...：''')
num1 = []
for i in num:
    if i >= b and i <= a:
        num1.append(i)

if c == '1':
    d = sorted(num1, reverse=True)
    print(d)
if c == '2':
    num1.sort()
    print(num1)

• 列表(namel)中存放若干老师姓名，嵌套列表(officelJ, L. OI)三个子列表（办公室）随机存储name中各老师姓名，输出office内容。

import random
teachers=['A','B','C','D','E','F','G','H']
offices=[[],[],[]]
for name in  teachers:
    num=random.randint(0,2)
    offices[num].append(name)
i=0
for i in offices:
    m=len(i)
    print(m)

print(offices)

• 编写函数:输入两个数和运算符输出运算结果。

a = int(input("请输入第一个数："))
b = int(input("请输入第二个数："))
symbol = input("请输入四则运算符号：(+-*/%)")
if symbol == "+":
    print("%s%s%s=%s"%(a,symbol,b,a+b))
elif symbol == "-":
    print("%s%s%s=%s"%(a,symbol,b,a-b))
elif symbol == "*":
    print("%s%s%s=%s"%(a,symbol,b,a*b))
elif symbol == "/":
    if b == 0:
        print("除数不能为零")
    else:print("%s%s%s=%s"%(a,symbol,b,a/b))
elif symbol=="%":
    print("%s%s%s=%s"%(a,symbol,b,a%b))
else:
    print("符号输入有误，请重新输入！！！")

• 编写函数:输出20项斐波那契数列项。

listnum = []
for x in range(1, 21):
    if x == 1 or x == 2:
        listnum.append(x)
    else:
        listnum.append(listnum[x-2]+listnum[x-3])
print(listnum)

• 设计编写长方体类，输入长、宽和高，输出面积和体积。

import math
import decimal
class Rect(object):
    def __init__(self,l,h,z):
        self.l = l
        self.h = h
        self.z = z

    def length(self):
        return 2*(self.l+self.h)

    def area(self):
        return self.l*self.h


class Cubic(Rect):
    def __init__(self,l,h,z):
        super(Cubic,self).__init__(l,h,z)

    #表面积
    def area(self):
        return 2*(self.l*self.h) + 2*(self.h*self.z) + 2* (self.l*self.z)

    #体积
    def tj(self):
        return super(Cubic,self).area() * self.z


    def show(self):
        print('{} {}'.format(decimal.Decimal(self.area()).quantize(decimal.Decimal('0.00')),decimal.Decimal(self.tj()).quantize(decimal.Decimal('0.00'))),end=' ')


if __name__ == '__main__':
    while True:
        a = float(input('请输入长：'))
        b = float(input('请输入宽：'))
        c = float(input('请输入高：'))
        if a <= 0 or b <= 0 or c <= 0:
            print('0.00 0.00 0.00 0.00')
        else:
            m = Cubic(a, b, c)
            m.show()

• 设计编写动物类Animal，属性、函数自定义;子类鸟Bird，属性继承父类属性，函数完成属性值的输出。编写代码执行子类函数。

class Animal(object):
    """定义动物类"""
    name = ""
    time = 0

    def __init__(self, name, time):
        self.setName(name)
        self.setTime(time)

    def setName(self, name):
        self.name = name

    def setTime(self, time):
        if not isinstance(time, int):
            print('必须是整数')
        self.time = time

    def tell(self):
        print("动物名称: " + self.name)
        print("喂食次数: " + str(self.time))


class brid(Animal):
    """定义猫类"""
    color = ""

    def __init__(self, name, time, color):
        Animal.__init__(self, name, time)
        self.color = color

    def tell(self):
        Animal.tell(self)
        print("动物颜色: " + self.color)

    def feed(self):
        self.time += 1


if __name__ == "__main__":
    Brid1 = brid("小鸟1号", 0, "花色")
    Brid1.tell()
    Brid1.feed()
    Brid1.tell()

• 登陆mysql数据库的用户名密码自定义，数据库名为mydb。数据表为login，包含uname、upassword字段。要求完成注册和登陆功能，
• 注册:输入用户名和密码，如果login表无此用户则插入到login中否则显示'用户已存在;

⑵登陆:输入用户名和密码，如果login表有此用户则'登陆成功'否则显示'登陆失败'。

"""
mysql
1.创建数据库
create database python charset=uft8;
2.创建表
create table py_users(
id int unsigned auto_increment not null primary key,
uname varchar(20) not null,
upwd char(40) not null,
);

"""
# 注册
import pymysql, pymongo, os


def login():
    """
    登录
    :return:
    """
    try:
        # 接收输入用户名、密码
        uname = input('请输入用户名：')
        upwd = input('请输入密码：')
        print(uname+upwd)
        # 根据用户名查询密码
        # 先到mongodb上查，没有再到mysql上查
        #client = pymongo.MongoClient('localhost', 27017)
        # 连接数据库
        #db = client.py3
        # 连接py_users集合
        #result = db.py_users.find_one({'uname': uname})
        # 如果集合中的数据为空，在mysql中查询
        #if result is None:
        conn = pymysql.connect(host='localhost', port=3306, database='mydb2', user='root', password='wzh123sal',
                               charset='utf8')
        if conn:
            print('connect successful')
        cur = conn.cursor()
        sql = 'select * from py_users where uname=%s and upwd=%s;'
        sql1 = "select * from py_users ;"
        params = [uname, upwd]
        #cur.execute(sql)
        cur.execute(sql,params)
        if cur:
            print('cur successful')
        result = cur.fetchone()
        if result :
            print(result[0]+':'+result[1])
            print('登录成功')
            show_stu()
        else:
            print('用户名不存在')
        #else:
        #    print('登录成功')
    except:
        print("用户名未注册，请先注册")
        sel = input("是否需要注册：1：注册  2：退出")
        if sel == '1':
            registered()
        else:
            os._exit(0)

def show_stu():
    try:
        conn = pymysql.connect(host='localhost', port=3306, database='mydb2', user='root', password='wzh123sal',
                               charset='utf8')
        if conn:
            print('connect successful')
        cur = conn.cursor()
        sql = "select * from student2;"
        cur.execute(sql)
        if cur:
            print('cur successful')
        results = cur.fetchall()
        print('studentid'+' '+'studentname'+' '+'age'+' '+'gender')
        print('-' * 30)
        for row in results:
            # studentid = row[0]
            # studentname = row[1]
            # age = row[2]
            # gender = row[3]
            print(f'{row[0]}',end='\t')
            print(f'{row[1]}',end='\t')
            print(f'{row[2]}',end='\t')
            print(f'{row[3]}')
            print('-'*30)
    except:
        print("no such tables!")

def registered():
    """
    注册
    :return:
    """
    uname = input('请输入用户名：')
    upwd = input('请输入密码：')
    sql = 'select upwd from py_users where uname=%s'
    params = [uname]
    # 打开与数据库的连接
    try:
        conn = pymysql.connect(host='localhost', port=3306, database='mydb2', user='root', password='wzh123sal',
                               charset='utf8')
        cur = conn.cursor()

        # 判断用户名是否存在
        sql = 'select count(*) from py_users where uname=%s'
        params = [uname]
        cur.execute(sql, params)
        result = cur.fetchone()
        if result[0] == 1:
            print('用户名已经存在，注册失败')
        else:
            # 用户名不存在
            sql = 'insert into py_users(uname,upwd) values(%s,%s)'
            params = [uname, upwd]
            result = cur.execute(sql, params)
            conn.commit()
            if result == 1:
                print('注册成功')
            else:
                print('注册失败')
        cur.close()

    except Exception as e:
        print('注册失败，原因是：%s' % e)
    finally:
        conn.close()


def main():
    # 打印菜单
    print('————功能选择——————')
    print('1.登录')
    print('2.注册')
    sel = input("登录(1)or 注册(2)?")
    try:
        if sel == '1':
            login()
        elif sel == '2':
            registered()
    except Exception as e:
        print('程序错误，%s'%e)


if __name__ == '__main__':
    main()