Python turtle绘图实例分析

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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