在Python中，可通过import命令导入模块以扩展功能。例如，math模块中的floor函数可去除数值的小数部分，与四舍五入的round函数不同，它直接向下取整，但结果仍保留小数形式。如floor (2.9)将返回2.0。使用时需先用import导入相应模块，语法结构为import 模块名，之后即可调用其中的函数来增强程序处理能力。

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os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).

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1、 启动Python的IDLE工具，创建名为imp.py的文件，输入相应代码内容。 2、 创建名为diao.py的文件，输入相应代码内容。 3、 导入imp模块后，调用其方法需通过模块名加点符号连接方法名。 4、 运行diao.py程序时，按F5导入imp模块，触发test1方法执行。 5、 修改diao.py文件，采用from import方式导入test2模块。 6、 按F5运行diao.p ...

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