<?xml version="1.0" encoding="utf-8" ?><rss version="2.0"><channel><title><![CDATA[wink_python的博客]]></title><description><![CDATA[]]></description><link>https://blog.youkuaiyun.com/wink_python</link><language>zh-cn</language><generator>https://blog.youkuaiyun.com/</generator><copyright><![CDATA[Copyright &copy; wink_python]]></copyright><item><title><![CDATA[python2]]></title><link>https://blog.youkuaiyun.com/wink_python/article/details/119139267</link><guid>https://blog.youkuaiyun.com/wink_python/article/details/119139267</guid><author>wink_python</author><pubDate>Tue, 27 Jul 2021 11:17:05 +0800</pubDate><description><![CDATA[]]></description><category></category></item><item><title><![CDATA[python1]]></title><link>https://blog.youkuaiyun.com/wink_python/article/details/119007555</link><guid>https://blog.youkuaiyun.com/wink_python/article/details/119007555</guid><author>wink_python</author><pubDate>Tue, 27 Jul 2021 11:14:41 +0800</pubDate><description><![CDATA[1.

[错误]turtle.pendown()作用是落下画笔，并移动画笔绘制一个点

turtle.pendown()只是放下画笔，并不绘制任何内容

[正确]turtle.penup()的别名有turtle.pu()与turtle.up()

2.

turtle.bk()只能后退，但不改变方向。

"后退"与"转向"有着本质的区别。
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