使用python绘制图形入门教程

1、python绘制一个长方形

from turtle import *
width(4)
forward(200)
right(90)
pencolor('red')
forward(100)
right(90)
pencolor('green')
forward(200)
right(90)
pencolor('blue')
forward(100)
right(90)
done()

输出如下：

 

2、绘制五角星

from turtle import *
def drawStar(x,y):
	pu()
	goto(x,y)
	pd()
	seth(0)
	for i in range(5):
		fd(40)
		rt(144)
for x in range(0,250,50):
	drawStar(x,0)
done()

输出如下：

3、绘制一颗分型树

from turtle import *
colormode(255)
lt(90)
lv = 14
l = 120
s = 45
width(lv)
# 初始化RGB颜色
r = 0 
g = 0
b = 0
pencolor(r,g,b)
penup()
bk(l)
pendown()
fd(l)
def draw_tree(l,level):
	global r,g,b
	w = width()
	width(w*3.0/4.0)
	r = r +1
	g = g +2
	b = b+3
	pencolor(r%200,g%200,b%200)
	l=3.0/4.0*l
	lt(s)
	fd(l)
	if level <lv:
		draw_tree(l,level+1)
	bk(l)
	rt(2*s)
	fd(l)
	if level <lv:
		draw_tree(l,level+1)
	bk(l)
	lt(s)
	width(w)
speed('fastest')
draw_tree(1,4)
done()

 由于时间较长，没能等到最终的结果：

最终的结果应该为：