#PythonDraw.py
import turtle
'''改成from turtle import*,之后的turtle.可以不写，还可以改成import turtle as t,之后用t代替turtle'''
turtle.setup(650,350,200,200)
turtle.penup() #起飞
turtle.fd(-250) #正前方向运行
turtle.pendown() #降落
turtle.pensize(25) #腰围/宽度orturtle.width()
turtle.pencolor("purple")
turtle.seth(-40) #改变朝向
for i in range(4):
turtle.circle(40,80) #左侧半径40，角度80的弧
turtle.circle(-40,80)
turtle.circle(40,80/2) #以左侧40为半径曲线运行
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40*2/3)
turtle.done()
turtle库(海龟)
turtle.setup(650,350,200,200)分别为窗口的长，宽，和到电脑屏幕左上角距离坐标
turtle.goto(x,y)
turtle.bk(40)向后运行
turtle角度坐标体系
默认采用小数，用turtle.colormode(mode)可以改变为0-255数值 mode为1.0或255
