python库——Turtle

penup():抬起画笔；
pendown():落下画笔；
pensize(width):画笔宽度；

forward(d)/fd(d): 向前移动距离d
backward(d)/bd(d): 向后移动距离d
left(angle):向左转angle度；
right(angle):向右转angle度；
goto(x,y):移动到绝对位置；
home() : 移动到原点；
circle(r, extent = None):绘制半径为r，角度为extent的弧形；
setheading(angle)/seth(angle):改变前进方向；
undo():撤销最后的动作；
speed():将速度设置为0..10范围内整数；

from turtle import *
color('red', 'yellow')
begin_fill()
while True:
    forward(200)
    left(170)
    if abs(pos()) < 1:
        break
end_fill()
done()

from turtle import *
setup(600, 600, 0, 0)
pensize(5)
up()
goto(0, -200)
down()

# 先画一个圆,并填充为红色
begin_fill()
color("red")
circle(radius=150)
end_fill()

# 画苹果把儿
color("brown")
penup()
goto(-90, 0)
pendown()
circle(180, 40)
penup()
setheading(105)
goto(-20, 20)
pendown()
circle(180, 50)
pendown()

# 画左边叶子
begin_fill()
color("green")
circle(180, 50)
setheading(-30)
circle(180, 55)
end_fill()

# 画右边叶子
begin_fill()
color("green")
setheading(0)
circle(180, 50)
setheading(-180)
circle(180, 50)
end_fill()
done()

from turtle import *
# 设置初始位置
penup()
left(90)
forward(200)
pendown()
right(90)
 
# 花蕊
fillcolor("blue")
begin_fill()
circle(10,180)
circle(25,110)
left(50)
circle(60,45)
circle(20,170)
right(24)
forward(30)
left(10)
circle(30,110)
forward(20)
left(40)
circle(90,70)
circle(30,150)
right(30)
forward(15)
circle(80,90)
left(15)
forward(45)
right(165)
forward(20)
left(155)
circle(150,80)
left(50)
circle(150,90)
end_fill()
 
# 花瓣1
left(150)
circle(-90,70)
left(20)
circle(75,105)
setheading(60)
circle(80,98)
circle(-90,40)
 
# 花瓣2
left(180)
circle(90,40)
circle(-80,98)
setheading(-83)
 
# 叶子1
forward(30)
left(90)
forward(25)
left(45)
fillcolor("green")
begin_fill()
circle(-80,90)
right(90)
circle(-80,90)
end_fill()
 
right(135)
forward(60)
left(180)
forward(85)
left(90)
forward(80)
 
# 叶子2
right(90)
right(45)
fillcolor("green")
begin_fill()
circle(80,90)
left(90)
circle(80,90)
end_fill()
 
left(135)
forward(60)
left(180)
forward(60)
right(90)
circle(200,60)
done()

from turtle import *
setup(600, 400, 0, 0)
bgcolor("red")
fillcolor("yellow")
color('yellow')
speed(10)
# 主星
begin_fill()
up()
goto(-280, 100)
down()
for i in range(5):
    forward(150)
    right(144)
end_fill()
# 副星一
begin_fill()
up()
goto(-100, 180)
setheading(305)
down()
for i in range(5):
    forward(50)
    left(144)
end_fill()
# 副星二
begin_fill()
up()
goto(-50, 110)
setheading(30)
down()
for i in range(5):
    forward(50)
    right(144)
end_fill()
# 副星三
begin_fill()
up()
goto(-40, 50)
setheading(5)
down()
for i in range(5):
    forward(50)
    right(144)
end_fill()
# 副星四
begin_fill()
up()
goto(-100, 10)
setheading(300)
down()
for i in range(5):
    forward(50)
    left(144)
end_fill()
hideturtle()
done()