1、跑马灯效果

'''
跑马灯
'''
import os
import time
def main():
    content='人生苦短,我用python....'
    while True:
        os.system('cls')
        print(content)
        time.sleep(0.2)
        content=content[1:]+content[0]
#if __name__=='__main__':
main()

2、录入员工姓名及联系方式,并根据姓名进行查询

zd = {}
name = '请输入您的姓名:'
phone= '请输入您的电话:'
while True:
    user_name = str(input(name))
    user_phone = str(input(phone))
    zd[user_name]=user_phone
    ok = str(input('是否录入完成?[Y/N]'))
    if ok == 'y' or ok == 'Y' or ok == '':
        break
#查询用户
print('接下来是查询用户的电话号码!')
while True:
    user_name = str(input(name))
    if user_name in zd:
        print('员工'+user_name+'的电话为:'+zd[user_name])
        ok = str(input('是否查询完毕?[Y/N]'))
        if ok == 'y' or ok == 'Y' or ok == '':
            break
    else:
        print('当前用户不存在,请重新输入!')

3、查询列表或元组中的最大值

age = (15,25,35,40,24)
def maxage():
    num1 = 0
    for i in age:
        if num1 < i:
            num1 = i
    return (num1)
print(maxage())

4、根据姓名查询业绩

ks = {'张三':'80','李四':'90','王五':'85'}
def a1():
    tishi = '请输入要查询的姓名:'
    name = input(tishi)
    if name in ks.keys():
        print(ks[name])
    else:
        print('当前用户不存在!')

a1()

5、使用用户输入的数字,计算由1到所输入数字的累加结果

def a2():
    sum1=0
    x = int(input('请输入一个数字:'))
    for i in range(1,x+1):
        sum1 += i
    print(sum1)

a2()

6、使用函数计算列表除了最大数和最小数的数值总和

def a1():
    a2 = ['80', '70', '75', '76', '36', '29', '86', '96']
    sum1 = 0
    for i in a2:
        if i < max(a2) and i > min(a2):
            sum1+=int(i)
    print(sum1)

a1()

7、九九乘法表

def jiujiu():
    for i in range(1,10):
        for n in range(1,i+1):
            print('%d x %d = %d' %(n,i,n*i),end =' ')
        print(' ')

jiujiu()

8、面向对象编程

1)

'''
面向对象编程
1、定义类:关键字class
2、创建对象:对象名=类名(可能需要传递参数列表)
3、调用对象的方法:用对象名.方法
'''

class Dog():
    '''模拟宠物狗'''

    def __init__(self, name, age):
        '''初始化'''
        self.name = name
        self.age = age

    def sit(self):
        '''模拟蹲下的动作'''
        print(self.name.title() + "is sitting.")

    def roll_over(self):
        '''模拟狗狗打滚'''
        print(self.name.title() + "rolled over.")

    def woof(self):
        '''模拟狗狗叫'''
        print(self.name + '正在叫')

    def life(self):
        '''模拟表示旺财被常威被打死了'''
        print(self.name + '被打死了')

# 基于类创建对象(实例)
my_dog = Dog(name="ssss", age=3)
my_dog.roll_over()
my_dog.sit()
my_dog.woof()

Dog('旺财', 5).life()

2)

class Car():
    def __init__(self,  brand, year):
        self.a = '一汽大众'
        self.b = brand
        self.c = year

    def info(self):
        print("汽车的制造商是:" + self.a, ";品牌是:" + self.b, ";生产年份是:" + self.c)

car_info = Car(brand="宝来", year="2019-12-12")
car_info.info()
Baoma_info=Car(brand='宝马',year="2017-07-07")
Baoma_info.a="德国"
Baoma_info.info()

3)判断用户账号密码的登录信息是否正确

class User():
    def __init__(self, user_name, password):
        self.name = user_name
        self.pwd = password

    def check_user(self):
        log = {'张三': '123', '李四': '456'}
        if self.name in log.keys():
            mima = log[self.name]
        else:
            print('该用户不存在!')
            exit(1)
        if self.name in log.keys() and self.pwd == mima:
            print("登录成功!!" + "您的账号是:" + self.name, ",您的密码是:" + self.pwd)
        else:
            print("密码输入错误,登录失败!")

s_name = str(input("请输入用户名:"))
s_pwd = str(input("请输入密码:"))
login = User(s_name, s_pwd)
login.check_user()

4)

from time import sleep
class Clock(object):
    '''数字时钟'''
    def __init__(self,hour=0,minute=0,second=0):
        '''初始化方法
        :param hour: 时
        :param minute:分
        :param second:秒
        '''
        self._hour = hour
        self._minute=minute
        self._second=second
    def run(self):
        """走字"""
        self._second +=1
        if self._second == 60:
            self._second=0
            self._minute +=1
            if self._minute==60:
                self._minute=0
                self._hour+=1
                if self._hour == 24:
                    self._hour=0

    def show(self):
        """显示时间"""
        return '%02d:%02d:%02d' % \
               (self._hour,self._minute,self._second)
def main():
    clock=Clock(23,59,58)
    while True:
        print(clock.show())
        sleep(1)
        clock.run()

if __name__ == '__main__':
    main()

9、时钟

from time import sleep
class Clock(object):
    '''数字时钟'''
    def __init__(self,hour=0,minute=0,second=0):
        '''初始化方法
        :param hour: 时
        :param minute:分
        :param second:秒
        '''
        self._hour = hour
        self._minute=minute
        self._second=second
    def run(self):
        """走字"""
        self._second +=1
        if self._second == 60:
            self._second=0
            self._minute +=1
            if self._minute==60:
                self._minute=0
                self._hour+=1
                if self._hour == 24:
                    self._hour=0

    def show(self):
        """显示时间"""
        return '%02d:%02d:%02d' % \
               (self._hour,self._minute,self._second)
def main():
    clock=Clock(23,59,58)
    while True:
        print(clock.show())
        sleep(1)
        clock.run()

if __name__ == '__main__':
    main()

10、父类与子类

一个.py文件就是一个模块;

模块===》类===》方法====》代码块 #这就是封装

基于父类创建子类:
1、子类必须和父类写在同一个文件中;
2、子类的类名后括号中要填写父类的类名;
3、子类的init()函数中必须调用父类的init()函数
4、使用子类实例化对象,这个对象自动继承父类所拥有的属性和方法
5、对于子类特有的属性和方法,我们可以在子类中任意定义。
6、方法重写(重载):子类方法名与父类的方法名相同,内容由自己来控制
7、使用实例做属性,就是提取出一些属性,封装到一个类中
8、当子类继承了父类以后,就可以调用父类中的函数,即使子类没有这些函数。


'''
父类与子类的定义与调用
'''

class Pet():
    '''宠物父类'''

    def __init__(self, name, sex):
        self.name = name
        self.sex = sex

    def get_info(self):
        print('宠物' + str(self.name) + '是' + str(self.sex) + '的')

class Dog(Pet):
    '''狗子类'''

    def __init__(self, name, sex, age):
        self.age = age
        super().__init__(name, sex)

    def get_info(self):
        print('宠物' + str(self.name) + '是' + str(self.sex) + '的,年龄是' + str(self.age) + '岁!')

class Qie(Pet):
    def __init__(self, name, sex, age):
        self.age = age
        super().__init__(name, sex)

    def get_info(self):
        print('宠物' + str(self.name) + '是' + str(self.sex) + '的,年龄是' + str(self.age) + '岁!')

if __name__ == '__main__':
    dog = Dog('李四', '女', '5')
    dog.get_info()
    qie = Qie('付嘉豪', '男', '18')
    qie.get_info()

============= 读取文件以及判断 ===================

11、读取文件

'''
拷贝图片:读取二进制文件,生成新的文件。
'''
def copy_pri():
    try:
        with open('a.png','rb') as pri1:
            old_pri=pri1.read()

        with open('bb.png','wb') as pri2:
            pri2.write(old_pri)
    except (FileExistsError,FileNotFoundError,IOError,Exception):
        print('文件不存在!')
    else:
        print('图片读取成功!')
    finally:
        print('程序退出!')

if __name__ == "__main__":
    copy_pri()

12:

1、加法运算
提示用户提供数值输入时,常出现的一个问题是,用户提供的是文本而不是数字。在这种情况下,当你尝试将输入转换为整数时,将引发ValueError异常。编写一个程序,提示用户输入两个数字,再将它们相加并打印结果。在用户输入的任何一个值不是数字时都捕获ValueError异常,并打印一条友好的错误消息。对你编写的程序进行测试:先输入两个数字,再输入一些文本而不是数字。

def jiafa_sum():
    try:
        num1=int(input('请输入第一个数:'))
        num2=int(input('请输入第二个数:'))
        print('{0}+{1}={2}'.format(num1,num2,num1+num2))
    except ValueError:
        print('你输入的不是数字!')

if __name__ == "__main__":
    jiafa_sum()

13、读两个文件

def showname(filename):
    try:
        with open(filename, 'r', encoding='utf-8') as dogs:
            data = dogs.read()
            print(filename + '的内容如下:')
            print(data)
    except FileNotFoundError:
        pass

if __name__ == '__main__':
    showname('dogs.txt')
    showname('cats.txt')

14、json文件的读取与写入

import json

nums = [1, 2, 3, 4, 5, 6, 7, 7, 8, ]
filename = 'num.json'
with open(filename, 'w') as f_obj:
    json.dump(nums, f_obj)

with open(filename, ) as f_obj:
    numbers = json.load(f_obj)
    print(numbers)

15、保存和读取用户生成的数据

json文件读取和写入的合并

import json

filename = 'username.json'
try:
    with open(filename) as f_obj:
        username = json.load(f_obj)
except FileNotFoundError:
    username = input('请输入用户名:')
    with open(filename, 'w') as f_obj:
        json.dump(username, f_obj)
        print('我们记住您了,欢迎' + username + '再回来!')

else:
    print("欢迎回来," + username + '!')

16、获取疫情实时图

import requests
import json
from pyecharts.charts import Map
from pyecharts import options as opts

def get_info():
    # 1.从原始网站获取疫情数
    url = 'https://interface.sina.cn/news/wap/fymap2020_data.d.json'
    result = requests.get(url).text
    html = json.loads(result)

    # 2.数据分析
    data = list()
    for provice in html['data']['list']:
        data.append((provice['name'], provice['value']))
    # print(data)

    # 3.页面渲染
    yq_news = Map()
    yq_news.set_global_opts(title_opts=opts.TitleOpts(title='疫情实时图-----' + html['data']['times']),
                            visualmap_opts=opts.VisualMapOpts(max_=1000))
    yq_news.add('确诊', data, maptype='china')

    # 4.生成html文件
    yq_news.render('ncov.html')

if __name__ == '__main__':
    get_info()

17、获取网站PV量及UV量

#!/usr/local/python38/bin/python3
#-*- coding:UTF-8 -*-
from __future__ import print_function

ips = []
with open('access.log') as f:
    for line in f:
        ips.append(line.split()[0])

print('PV is {0}'.format(len(ips)))
print('UV is {0}'.format(len(set(ips))))

18、获取磁盘信息

#!/usr/bin/env python3
# -*- conding:utf-8 -*-

from __future__ import print_function
from collections import namedtuple

disk = namedtuple('Disk', 'major_number minor_number device_name'
                          ' read_count read_merged_count read_sections'
                          ' time_spent_reading write_count write_merged_count'
                          ' write_sections time_spent_write io_requests'
                          ' time_spent_doing_io weighted_time_spent_dong_io')

def get_disk_info(device):
    with open('/proc/diskstats') as f:
        for line in f:
            if line.split()[2] == device:
                return disk(*(line.split()))
    raise RuntimeError('设备({0})没找到。。。'.format(device))

def main():
    disk_info = get_disk_info('sda1')
    print(disk_info)

if __name__ == '__main__':
    main()