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孩子学Python总觉得枯燥坐不住?今天带他用几行代码召唤一只画画小海龟

  • 2026-06-28 03:06:40
孩子学Python总觉得枯燥坐不住?今天带他用几行代码召唤一只画画小海龟

哈罗,大朋友们小朋友们!之前带孩子们学 Python,咱们算过算术、比过大小,虽然逻辑思维练得挺好,但总有家长跟我反馈:“老师,天天对着一堆黑白数字和符号,小家伙敲了几步就觉得有点无聊了,有没有什么能直接看到画面、更好玩的东西?”

别急,今天就带孩子们解锁一个 Python 里的“作弊神器”——Turtle(海龟绘图)

今天不聊复杂的算法,咱们直接在电脑里养一只会画画的小海龟,让孩子一秒看到自己敲的代码是怎么变成画面的!

🐢 这只“小海龟”到底是何方神圣?

其实在很久以前,科学家为了让小孩子高高兴兴地学编程,就发明了一种玩法:在屏幕上画一只小海龟,你给它下命令,比如“往前走100步”、“向左转个弯”,它爬过的地方就会留下一条笔迹。

久而久之,这个好玩的玩法就被搬进了 Python 里,成了一个自带的“绘图工具箱”。

想象一下,生活里我们画画需要准备画布、画笔、颜料。在 Python 符号王国里,其实也是一样的步骤:

  • 用 screensize() 来挑个多大的画板。

  • 用 pensize() 来决定画笔是粗还是细。

  • 用 pencolor() 来挑一根五颜六色的彩色笔。

最逗的是,输入 shape('turtle'),画笔的箭头形状就真的变成一只胖乎乎的小海龟了,超级可爱!

📢 怎么指挥小海龟?记住这几个“魔法口令”

想要让海龟听话,只需要教孩子认得 4 个最基础的英文单词(口令)就行,顺便连英语也一起记住了:

  1. import turtle(召唤术) 这是大喊一声“海龟盒子快开门!”。用工具箱之前,必须先把它请出来。

  2. forward(100)(前进) 让海龟顺着头指的方向,笔直往前爬 100 步。

  3. left(90) / right(90)(转弯) 让海龟往左或者往右原地转个 90 度的弯。注意哦,这时候它只是转了个身,还没迈步子呢。

  4. done()(大功告成): 告诉电脑“我画完啦,画板别关,让我瞅瞅”。

🏃‍♂️ 慢动作拆解:用代码画一个完美的正方形!

光说不练假把式,我们来看看怎么用这些大白话口令,指挥海龟在屏幕上走出一个正方形。

在 PyCharm 里把这段代码敲进去,让孩子看看奇迹:

import turtle             # 1. 召唤海龟工具箱
turtle.shape('turtle')    # 2. 把画笔变成小海龟形状
turtle.speed(1)           # 3. 速度调成1,咱们慢动作看它爬
开始画图啦!
turtle.forward(100)       往前爬100步(画出第一条底边)
turtle.left(90)           往左原地转90度(面朝上方)
turtle.forward(100)       再往上爬100步(画出第二条右边)
turtle.left(90)           往左原地转90度(面朝左方)
turtle.forward(100)       往左爬100步(画出第三条顶边)
turtle.left(90)           往左原地转90度(面朝下方)
turtle.forward(100)       往下爬100步(画出第四条左边,正好闭合!)
turtle.done()             # 4. 画完啦,定格欣赏!
按下运行键,孩子就会看到那只小海龟慢悠悠地在屏幕上爬了一个圈,一个整整齐齐的正方形就拔地而起!这种直观的视觉反馈,对小孩子来说成就感直接爆棚。

📝 今日碎碎念

以前总觉得编程抽象,其实只要找对方法,代码就能变成画笔、变成游戏。 今天孩子们通过这只小海龟,不仅复习了上一期学的“自上而下老老实实排队”的顺序结构,还顺便学会了空间方向感和简单的角度问题。

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  1. CONNECT:[ UseTime:0.000544s ] mysql:host=127.0.0.1;port=3306;dbname=f_mffb;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000588s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.041667s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.001498s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001538s ]
  6. SELECT * FROM `set` [ RunTime:0.011722s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.002153s ]
  8. SELECT * FROM `article` WHERE `id` = 499036 LIMIT 1 [ RunTime:0.050770s ]
  9. UPDATE `article` SET `lasttime` = 1783021754 WHERE `id` = 499036 [ RunTime:0.032983s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.019416s ]
  11. SELECT * FROM `article` WHERE `id` < 499036 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.001593s ]
  12. SELECT * FROM `article` WHERE `id` > 499036 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.009304s ]
  13. SELECT * FROM `article` WHERE `id` < 499036 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.052407s ]
  14. SELECT * FROM `article` WHERE `id` < 499036 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.409672s ]
  15. SELECT * FROM `article` WHERE `id` < 499036 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.066078s ]
0.781480s