### turtle模块

turtle模块：python内置的绘图工具

turtle(海龟)模块，我们是用它来进行画图的，基本上就是画简单的直线，点，和曲线。

### 基本操作（Turtle方法）

• turtle.forward(step):前进step个像素
• turtle.back(step):后退step个像素
• turtle.right():右转一个角度
• turtle.left():左转一个角度
• turtle.pencolor(“string”):画笔颜色
• turtle.fillcolor(“string”):填充颜色
• turtle.speed(int):运动速度

https://docs.python.org/zh-cn/3.7/library/turtle.html

### 具体代码实现

```# 绘画
# 中国国旗
# 转载请标明出处！！

import turtle
import time

def draw__stars(tur, step, x, y, arg):
"""
绘制五角星
:param tur: turtle object
:param step: 五角星一条边的长度
:param x: 开始绘制五角星的起点x坐标
:param y: 开始绘制五角星的起点y坐标
:param arg:
:return:
"""
tur.pencolor("yellow")
tur.fillcolor("yellow")
tur.up()
tur.goto(x, y)
tur.begin_fill()
tur.down()
tur.right(arg)
tur.forward(step)
tur.right(144)
tur.forward(step)
tur.right(144)
tur.forward(step)
tur.right(144)
tur.forward(step)
tur.right(144)
tur.forward(step)
tur.right(144)
tur.end_fill()

def draw__flag(tur, wide, height):
"""
绘制国旗的长方形形状
:param tur: turtle object
:param wide: the width of the flag
:param height: the height of the flag
:return: None
"""
tur.pencolor("red")
tur.fillcolor("red")
tur.goto(- wide / 2, height / 2)
tur.begin_fill()
tur.forward(wide)
tur.right(90)
tur.forward(height)
tur.right(90)
tur.forward(wide)
tur.right(90)
tur.forward(height)
tur.end_fill()

if __name__ == "__main__":
"""
main 函数
"""
# tur = turtle.Turtle()
turtle.screensize(canvwidth=3000, canvheight=2000, bg=None)
# 绘制star的turtle对象
tur_star = turtle.Turtle()
# 绘制flag的turtle对象
tur_flag = turtle.Turtle()
tur_flag.speed(3)
tur_star.speed(3)
# 隐藏turtle对象
tur_star.hideturtle()
tur_flag.hideturtle()
# 间隔3秒，可以没有，这个是我调试时加上去的
time.sleep(3)
# 绘制长方形
draw__flag(tur_flag, 630, 420)
# 绘制五角星，在合适的位置进行绘制五角星
# 调用五次函数绘制五颗五角星
draw__stars(tur_star, step=60, x=-280, y=155, arg=0)
draw__stars(tur_star, step=25, x=-182, y=177, arg=- 25)
draw__stars(tur_star, step=25, x=-175, y=125, arg=41)
draw__stars(tur_star, step=25, x=-208, y=79, arg=23)
draw__stars(tur_star, step=25, x=-265, y=75, arg=48)
# 使画面锁定
turtle.done()

```