subst:tldr:d8e17

The command subst ${Z:} ${C:\Python2-7} is using the subst command in the Windows command prompt to create a virtual drive letter (Z:) that points to the directory on the local disk (C:\Python2-7).

Here is a breakdown of the command:

• subst: This is a command in Windows used to create, remove, or manage virtual drives.
• ${Z:}: This is a placeholder representing the desired drive letter to be assigned. In this case, it is specifying the letter Z.
• ${C:\Python2-7}: This is a placeholder representing the path to the directory that will be assigned to the virtual drive. In this case, it is set to C:\Python2-7, which is a path to a directory named Python2-7 located on the C: drive.

When this command is executed, a virtual drive Z: will be created, and whenever you access Z:\ in Windows Explorer or any other file management utility, it will point to the C:\Python2-7 directory.