需求:
繪制一個可以顯示時間的數位表
思路:
- 繪制單個數字的數位管
- 獲得一串數字,繪制對應的數位管
- 獲得目前系統時間,繪制對應的數位管
思維:
- 子產品化思維:确定子產品接口,封裝功能
- 規則化思維:抽象過程為規則,計算機自動執行
- 花繁為簡:将大功能變為小功能組合,分而治之
代碼如下:
# DigitalPipe.py
import turtle,time
def drawgap():
turtle.penup()
turtle.fd(5)
def drawLine(flag):
drawgap()
turtle.pendown() if flag else turtle.penup()
turtle.fd(40)
drawgap()
turtle.right(90)
def drawDigit(digit):
drawLine(True) if digit in [2,3,4,5,6,8,9] else drawLine(False)
drawLine(True) if digit in [0,1,3,4,5,6,7,8,9] else drawLine(False)
drawLine(True) if digit in [0,2,3,5,6,8,9] else drawLine(False)
drawLine(True) if digit in [0,2,6,8] else drawLine(False)
turtle.left(90)
drawLine(True) if digit in [0,4,5,6,8,9] else drawLine(False)
drawLine(True) if digit in [0,2,3,5,6,7,8,9] else drawLine(False)
drawLine(True) if digit in [0,1,2,3,4,7,8,9] else drawLine(False)
turtle.penup()
turtle.left(180)
turtle.fd(40)
def drawDate(date):
for i in date:
if i is '-':
writeChar("年",g=1)
elif i is '=':
writeChar("月",b=1)
elif i is '+':
writeChar("日")
else:
drawDigit(eval(i))
def writeChar(char,r=0,g=0,b=0):
turtle.write(char,font=("Arial",18,"normal"))
turtle.pencolor(r,g,b)
turtle.fd(40)
def main():
turtle.setup(1200,350)
turtle.speed(0)
turtle.penup()
turtle.fd(-450)
turtle.pensize(5)
t=time.gmtime()
ft=time.strftime("%Y-%m=%d+",t)
print(ft)
turtle.pencolor(1,0,0)
drawDate(ft)
turtle.hideturtle()
turtle.down()
main()