python课程代码1

#Ex5_3.py #给该代码的每一行加上注释，以进一步理解其含义 import turtle def drawLine2(draw,length): #绘制单段数码管 if (draw): turtle.pendown() turtle.begin_fill() turtle.left(45) turtle.fd(int(length/10.0*(2**0.5))) turtle.right(45) turtle.fd(int(length*8/10.0)) turtle.right(45) turtle.fd(int(length/10.0*(2**0.5))) turtle.right(90) turtle.fd(int(length/10.0*(2**0.5))) turtle.right(45) turtle.fd(int(length*8/10.0)) turtle.right(45) turtle.fd(int(length/10.0*(2**0.5))) turtle.right(135) turtle.end_fill() turtle.penup() turtle.fd(length) turtle.right(90) def drawDigit2(digit,length): #根据数字绘制七段数码管 drawLine2(True,length) if digit in [2,3,4,5,6,8,9] else drawLine2(False,length) drawLine2(True,length) if digit in [0,1,3,4,5,6,7,8,9] else drawLine2(False,length) drawLine2(True,length) if digit in [0,2,3,5,6,8,9] else drawLine2(False,length) drawLine2(True,length) if digit in [0,2,6,8] else drawLine2(False,length) turtle.left(90) drawLine2(True,length) if digit in [0,4,5,6,8,9] else drawLine2(False,length) drawLine2(True,length) if digit in [0,2,3,5,6,7,8,9] else drawLine2(False,length) drawLine2(True,length) if digit in [0,1,2,3,4,7,8,9] else drawLine2(False,length) turtle.left(180) turtle.penup() turtle.fd(20) def drawDate(date): #获得要输出的数字 for i in date: drawDigit2(eval(i),60) def main(): turtle.setup(800, 350, 200, 200) turtle.tracer(False) turtle.penup() turtle.fd(-300) turtle.pensize(1) turtle.color('red', 'yellow') #设置笔的颜色和填充颜色 drawDate('20181010') turtle.hideturtle() turtle.done() main()