Python Turtle入门-2

代码1:

划一个简单的x及y轴,标出原点O及坐标为(100,100)的A点。

import turtle

turtle.goto(0,0)
turtle.dot(20,"yellow")
turtle.write("O", font=('Arial', 10, 'normal'))
turtle.forward(300)
turtle.forward(-600)

turtle.goto(0,0)
turtle.left(90)
turtle.forward(300)
turtle.forward(-600)

turtle.penup()
turtle.goto(100,100)
turtle.dot(10,"red")
turtle.write("A", font=('Arial', 10, 'normal'))
turtle.pendown()
turtle.circle(20)
turtle.mainloop()

代码2:划出一个五角星。线框为黄色,填充色为红色。5角星的144度是有一个关系算法:144*5=720=360*2

import turtle
  
turtle.pensize(5)
turtle.pencolor("yellow")
turtle.fillcolor("red")
turtle.backward(200)
turtle.begin_fill()
for _ in range(5):
  turtle.forward(400)
  turtle.right(144)
turtle.end_fill()

课后作业:

1.复制上述代码,在Python环境下运行。

2.读懂上述代码。