这要求nose读取项目中具有指定的扩展名的所有文本文件，运行并检查它找到的所有doctest。

This asks nose to read through all text files in your project with the given extension, running and verifying any doctests that it finds.

youdao

该数据定义文件是一个以。ttx为扩展名的、有标记界限的文本文件，良好地展现了表结构。

This data definition file is a tab-separated text file, with a.ttx file extension (TTX), that is an outline of a table structure.

youdao