我的备课过程

 案例一，有关于数据类型

num1 = 10
num2 = 10.00
string1 ='10.00'
string2 ="10.00"
string3 ='''10.00'''

print(type(num1))
print(type(num2))
print(type(string1))
print(type(string2))
print(type(string3))

案例二，披萨点单系统

number = int(input("请问您需要多少份披萨？"))
#input函数接受键盘输入的披萨份数，再用int对键入的数据进行强制转型成int型
per_pizza = float(input("一份pizza多少元？"))
#input函数接受键盘输入的披萨份数，再用int对键入的数据进行强制转型成float型
total = number*per_pizza
#上面已经转成可参与运算的类型，可以进行乘法运算
print("您共需要支付"+str(total)+'元')
#输出用“+"拼接字符串

python的turtle项目：送你一朵小红花

import turtle#导入海龟画图库

t = turtle.Pen()
t.pensize(10)
t.speed(0)#导入海龟画图后，设置好画笔的大小，速度

str_num = 5
int_num = 3
float_num = 1

colors = ['purple','orange','green','yellow','blue','red','white','gray']#创建一个列表存放颜色元素
for x in range(str_num):#用定义出来的str_num来进行循环控制
    t.pencolor(colors[str_num])#从颜色列表中选取具体颜色，索引号是循环便利序号，第5个，红色
    t.circle(360/str_num)
    t.left(360/str_num + 1)
#至此，画出5个红色的相交的圆
for x in range(int_num):
    t.pencolor(colors[int_num])
    t.circle(30)
    t.left(360/int_num + 1)
#至此，画出3个黄色的相交的圆
t.goto(0,-10)
for x in range(float_num):
    t.pencolor(colors[float_num])
    t.circle(10)
    t.left(360/float_num + 1)
#至此，画出1个橙色的相交的圆
turtle.done()

数据类型转换案例（BMI值计算）：

height = float(input('请输入您的身高（m）：'))
weight = float(input('请输入您的体重（kg）：'))
BMI = weight/(height**2)
print('您的BMI值为：'+str(BMI))
print('您的BMI值为（取整）：'+str(int(BMI)))

小游戏：更改前面的输入代码就好

# SmileyPong.py

##########################################################
##########################################################
lives=int(input("请输入你的生命值："))   
add=float(input("每接到一次球将增加的得分为："))
##########################################################
##########################################################

import pygame       
pygame.init()
screen = pygame.display.set_mode([800,600])
pygame.display.set_caption("Smiley Pong")
keepGoing = True
pic = pygame.image.load("CrazySmile.bmp")
colorkey = pic.get_at((0,0))
pic.set_colorkey(colorkey)
picx = 0
picy = 0
BLACK = (0,0,0)
WHITE = (255,255,255)
timer = pygame.time.Clock()
speedx = 5
speedy = 5
paddlew = 200
paddleh = 25
paddlex = 300
paddley = 550
picw = 100
pich = 100
points = 0
font = pygame.font.SysFont("Times", 24)
while keepGoing:    # Game loop
    for event in pygame.event.get(): 
        if event.type == pygame.QUIT: 
            keepGoing = False
        if event.type == pygame.KEYDOWN:
            if event.key == pygame.K_F1:    # F1 = New Game
                points = 0
                ##########################################################
                ##########################################################
                lives=int(input("请输入你的生命值："))   
                add=float(input("每接到一次球将增加的得分为："))
                ##########################################################
                ##########################################################

                picx = 0
                picy = 0
                speedx = 5
                speedy = 5
            
    picx += speedx
    picy += speedy
    
    if picx <= 0 or picx >= 700:
        speedx = -speedx * 1.1
    if picy <= 0:
        speedy = -speedy + 1
    if picy >= 500:
        lives -= 1
        speedy = -5
        speedx = 5
        picy = 499
    screen.fill(BLACK)    
    screen.blit(pic, (picx, picy))
    # Draw paddle
    paddlex = pygame.mouse.get_pos()[0]
    paddlex -= paddlew/2
    pygame.draw.rect(screen, WHITE, (paddlex, paddley, paddlew, paddleh))
    # Check for paddle bounce
    if picy + pich >= paddley and picy + pich <= paddley + paddleh 
       and speedy > 0:
        if picx + picw/2 >= paddlex and picx + picw/2 <= paddlex + 
           paddlew:
            speedy = -speedy
            points += add
    # Draw text on screen
    draw_string = "Lives: " + str(lives) + " Points: " + str(points)
    # Check whether the game is over
    if lives < 1:   
        speedx = speedy = 0
        draw_string = "Game Over. Your score was: " + str(points)
        draw_string += ". Press F1 to play again. "
        
    text = font.render(draw_string, True, WHITE)
    text_rect = text.get_rect()
    text_rect.centerx = screen.get_rect().centerx
    text_rect.y = 10
    screen.blit(text, text_rect)
    pygame.display.update()
    timer.tick(60)
    
pygame.quit()       # Exit