turtle绘图

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• 小数RGB色彩：turtle.colormode(1.0)
• 整数RGB色彩：turtle.colormode(255)
• 设置窗口大小和初始位置：turtle.setup(width,height[,startx,starty])
• 提起画笔：turtle.penup()
• 放下画笔：turtle.pendown()
• 前进：turtle.fd()
• 设置绝对方向：turtle.seth()
• 设置转向角度：turtle.left() / turtle.right()
• 设置画笔大小：turtle.pensize() turtle.width()
• 画笔跳转到指定位置：turtle.goto()

# python.py

import turtle

turtle.setup(1200,800,200,200)
turtle.pencolor("red")
turtle.pensize(10)
turtle.penup()
turtle.fd(-50)
turtle.pendown()
turtle.seth(40)

for i in range(5):
    turtle.circle(-40,80)
    turtle.circle(40,80)

turtle.circle(-50,40)