The scripts for different projects are placed under different hierarchical directories. For example, as follows, there may be script dependencies in folder 2, and whether folders and script dependencies can be supported at present.
                Folder 2.1
File 1--"Box 2.2-------" File 3
               Folder 2.3

     不同的项目的脚本放在不同的分层目录下面，举个例子 如下，可能文件夹2中还有脚本的依赖，目前能否支持文件夹和脚本的依赖。

The following do not yet have any pytests:

• boolean_algebra
• digital_image_processing
• divide_and_conquer
• hashes
• linear_algebra #1124
• networking_flow #1126
• traversals
• file_transfer_protocol
• machine_learning
• neural_network

For ease of review, please only modify one directory per pull request.