python程序实例讲解_Python语言程序设计基础（2）—— Python程序实例解析
温度转换
deftempConvert(ValueStr):if ValueStr[-1] in ['F','f']:
ans= (eval(ValueStr[0:-1]) - 32)/1.8
print("{:.2f}C".format(ans))elif ValueStr[-1]=='C' or ValueStr[-1]=='c':
ans= 1.8*eval(ValueStr[0:-1]) + 32
print("{:.2f}F".format(ans))else:print("格式错误")
str=input()
tempConvert(str)
画蟒蛇
importturtledefdrawSnake(radius,angle,length):
turtle.seth(-angle/2)for i inrange(length):
turtle.circle(radius,angle)
turtle.circle(-radius,angle)
turtle.circle(radius,angle/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40*2/3)
turtle.setup(0.5,0.5)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)
turtle.pencolor("purple")
drawSnake(40,120,4)
turtle.done()
习题部分
温度转换，输出整数
deftempConvert(ValueStr):print(ValueStr)if ValueStr[-1] in ['F','f']:
ans= (eval(ValueStr[0:-1]) - 32)/1.8
print("{:.0f}C".format(ans))elif ValueStr[-1]=='C' or ValueStr[-1]=='c':
ans= 1.8*eval(ValueStr[0:-1]) + 32
print("{:.0f}F".format(ans))else:print("格式错误")
tempConvert(eval(input()))
美元转换
defcalc(x):if x[-1]=='$':return eval(x[0:-1])*6
elif x[-1]=='￥':return eval(x[0:-1])/6
else:return -1money=input()print(calc(money),end='')if money[-1]=='$':print('￥')elif money[-1]=='￥':print('$')else:print("errer")
彩色蛇
importturtledefdrawSnake(radius,angle,length):
turtle.seth(-angle/2)
color= ["grey","gold","violet","purple","black"]for i inrange(length):
turtle.pencolor(color[i])
turtle.circle(radius,angle)
turtle.circle(-radius,angle)
turtle.pencolor(color[-1])
turtle.circle(radius,angle/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40*2/3)
turtle.setup(0.5,0.5)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)#turtle.pencolor("purple")
drawSnake(40,120,4)
turtle.done()
三角形
importturtleimportmathdefpaintS():
turtle.setup(0.5,0.5)for i in range(3):
turtle.seth(120*i)
turtle.forward(50)
turtle.done()
四边形
defpaintX():
turtle.setup(0.5,0.5)
turtle.pensize(5)
turtle.pencolor("gold")for i in range(4):
turtle.seth(i*90)
turtle.penup()
turtle.forward(20)
turtle.pendown()
turtle.forward(60)
turtle.penup()
turtle.forward(20)
turtle.done()
paintX()
六角形
importturtleimportmathdefpaint():
turtle.pensize(5)
x= -30turtle.seth(x)for i in range(1,4):
turtle.forward(150)
turtle.seth(x+120)
x+=120turtle.penup()
turtle.seth(-60)
turtle.forward(50*math.sqrt(3))
turtle.pendown()
x= 30turtle.seth(x)for i in range(1,4):
turtle.forward(150)
turtle.seth(x+120)
x+=120turtle.done()
paint()
正方形螺旋线
importturtleimportmathdefpainZ():
turtle.pensize(2)
cnt=0
x= 10
for i in range(1,60):
turtle.seth(90*i)if cnt >=2:
x+=10cnt=0
turtle.forward(x)
cnt+=1turtle.done()
painZ()