2.1 turtle 基础回顾与环境准备 在开始画月亮之前，先确认你的 Python 环境没问题。 打开终端或命令行，输入 python --version ，能看到 Python 3.x 的版本号就行。 turtle 是标准库，不需要额外安装。 如果你用的是 PyCharm 或 VS Code，直接新建一个 .py 文件就可以开始写。

本内容遵循CC 4.0 BY-SA版权协议 Python标准库是这门语言最强大的武器库之一，它随Python解释器预装，无需额外安装即可使用。我从业十年来见证过太多开发者重复造轮子，而实际上标准库早已提供现成解决方案。标准库包含200多个模块，覆盖文件操作、系统交互 ...

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