Python turtle绘图实例分析

画一个红色的五角星

from turtle import *
color('red','red')
begin_fill()
for i in range(5):
    fd(200)
    rt(144)

end_fill()
done()

效果图：

画一条蟒蛇

#PythonDraw.py
import turtle
#turtle.setup(650,350,200,200)
turtle.penup()
turtle.fd(-250)
turtle.pendown()
turtle.pensize(25)
turtle.pencolor("purple")
turtle.seth(-40)
for i in range(4):
    turtle.circle(40,80)
    turtle.circle(-40,80)
turtle.circle(40,80/2)
turtle.fd(40)
turtle.circle(16,180)
turtle.fd(40*2/3)

效果图：

画一组内切圆

import turtle
turtle.pensize(2)
turtle.circle(10)
turtle.circle(40)
turtle.circle(80)
turtle.circle(120)

效果图：

画一个社会人小猪佩奇，代码是借鉴某位大佬的

from turtle import *
def nose(x,y):
    pu()
    goto(x,y)
    pd()
    seth(-30)
    begin_fill()
    a=0.4
    for i in range(120):
        if 0<=i<30 or 60<=i<90:
            a=a+0.08
            lt(3)
            fd(a)
        else:
            a=a-0.08
            lt(3)
            fd(a)
    end_fill()

    pu()
    seth(90)
    fd(25)
    seth(0)
    fd(10)
    pd()
    pencolor(255,155,192)
    seth(10)
    begin_fill()
    circle(5)
    color(160,82,45)
    end_fill()

    pu()
    seth(0)
    fd(20)
    pd()
    pencolor(255,155,192)
    seth(10)
    begin_fill()
    circle(5)
    color(160,82,45)
    end_fill()

def head(x,y):
    color((255,155,192),"pink")
    pu()
    goto(x,y)
    seth(0)
    pd()
    begin_fill()
    seth(180)
    circle(300,-30)
    circle(100,-60)
    circle(80,-100)
    circle(150,-20)
    circle(60,-95)
    seth(161)
    circle(-300,15)
    pu()
    goto(-100,100)
    pd()
    seth(-30)
    a=0.4
    for i in range(60):
        if 0<=i<30 or 60<=i<90:
            a=a+0.08
            lt(3)
            fd(a)
        else:
            a=a-0.08
            lt(3)
            fd(a)
    end_fill()

def ears(x,y):
    color((255,155,192),"pink")
    pu()
    goto(x,y)
    pd()
    begin_fill()
    seth(100)
    circle(-50,50)
    circle(-10,120)
    circle(-50,54)
    end_fill()

    pu()
    seth(90)
    fd(-12)
    seth(0)
    fd(30)
    pd()
    begin_fill()
    seth(100)
    circle(-50,50)
    circle(-10,120)
    circle(-50,56)
    end_fill()

def eyes(x,y):
    color((255,155,192),"white")
    pu()
    seth(90)
    fd(-20)
    seth(0)
    fd(-95)
    pd()
    begin_fill()
    circle(15)
    end_fill()

    color("black")
    pu()
    seth(90)
    fd(12)
    seth(0)
    fd(-3)
    pd()
    begin_fill()
    circle(3)
    end_fill()

    color((255,155,192),"white")
    pu()
    seth(90)
    fd(-25)
    seth(0)
    fd(40)
    pd()
    begin_fill()
    circle(15)
    end_fill()

    color("black")
    pu()
    seth(90)
    fd(12)
    seth(0)
    fd(-3)
    pd()
    begin_fill()
    circle(3)
    end_fill()

def cheek(x,y):
    color((255,155,192))
    pu()
    goto(x,y)
    pd()
    seth(0)
    begin_fill()
    circle(30)
    end_fill()

def mouth(x,y):
    color(239,69,19)
    pu()
    goto(x,y)
    pd()
    seth(-80)
    circle(30,40)
    circle(40,80)

def body(x,y):
    color("red",(255,99,71))
    pu()
    goto(x,y)
    pd()
    begin_fill()
    seth(-130)
    circle(100,10)
    circle(300,30)
    seth(0)
    fd(230)
    seth(90)
    circle(300,30)
    circle(100,3)
    color((255,155,192),(255,100,100))
    seth(-135)
    circle(-80,63)
    circle(-150,24)
    end_fill()

def hands(x,y):
    color((255,155,192))
    pu()
    goto(x,y)
    pd()
    seth(-160)
    circle(300,15)
    pu()
    seth(90)
    fd(15)
    seth(0)
    fd(0)
    pd()
    seth(-10)
    circle(-20,90)

    pu()
    seth(90)
    fd(30)
    seth(0)
    fd(237)
    pd()
    seth(-20)
    circle(-300,15)
    pu()
    seth(90)
    fd(20)
    seth(0)
    fd(0)
    pd()
    seth(-170)
    circle(20,90)

def foot(x,y):
    pensize(10)
    color((240,128,128))
    pu()
    goto(x,y)
    pd()
    seth(-90)
    fd(40)
    seth(-180)
    color("black")
    pensize(15)
    fd(20)

    pensize(10)
    color((240,128,128))
    pu()
    seth(90)
    fd(40)
    seth(0)
    fd(90)
    pd()
    seth(-90)
    fd(40)
    seth(-180)
    color("black")
    pensize(15)
    fd(20)

def tail(x,y):
    pensize(4)
    color((255,155,192))
    pu()
    goto(x,y)
    pd()
    seth(0)
    circle(70,20)
    circle(10,330)
    circle(70,30)

def setting():
    pensize(4)
    hideturtle()
    colormode(255)
    color((255,155,192),"pink")
    setup(840,500)
    speed(10)

def main():
    setting()
    nose(-100,100)
    head(-69,167)
    ears(0,160)
    eyes(0,140)
    cheek(80,10)
    mouth(-20,30)
    body(-32,-8)
    hands(-56,-45)
    foot(2,-177)
    tail(148,-155)
    done()

main()
            

效果极佳：

简单总结一下好了，其实turtle库还是非常有用的，以后可以画张很有创意的图片去表白女神了，讲不好那天就用上了呢：

显示器和turtle窗体的左上角都是原点
turtle.setup(width,height,startx,starty)设置窗体大小及位置，后面两个参数可选，非必需
空间坐标：绝对坐标：右方向x轴，上方向为y轴，正中心为原点，turtle.goto(x,y)让在任何位置的海龟到达指定的位置
海龟坐标：turtle.fd(d)海龟向前行多少像素
turtle.bk(d)向海龟的反方向运行
turtle.circle(r,angle)以海龟左边的某一点为圆心进行曲线运行
角度坐标：绝对角度：turtle.seth(angle)angle为绝对度数，表示改变海龟的运行方向
海龟角度：turtle.right(angle),turtle.left(angle)改变海龟的运行方向
RGB体系：turtle.colormode(mode)mode=1.0则改用0和1表示，mode=255则改用255和0表示，默认为小数
库引用：import <库名>,from <库名> import *或者from <库名> import <函数名>,import <库名> as <库别名>
画笔控制函数：turtle.penup()别名：turtle.pu()抬起画笔，turtle.pendown()别名：turtle.pd()落下画笔，turtle.pensize(width)别名：turtle.width(width)设置画笔宽度，turtle.pencolor(color)设置画笔颜色，color有三种方式，颜色字符串，或者RGB小数值，或者RGB元组值，例如：turtle.pencolor((0.63,0.13,0.94))
运动控制函数:turtle.circle(r,angle),r（海龟左方向）表示半径，angle表示绘制的角度，默认是360度
方向控制函数：turtle.seth(angle)改变海龟的行进方向，顺时针转向