Project Panel. Add Files from Directory by mask
Use Notepad++ as Python IDE. I often work with projects and use this feature. It lacks the ability to add files by mask.
For example, when you want to add to the project or create a project using only python files (without .pyw, .exe, .txt and etc.).
The project file is just XML. Why not write a Python script to create the XML file you want? I wrote myself an AWK script to do that, and it worked well.
I don’t use the project panel much any more–only for “stock” help files and such that I always want to be able to get to. For “project” file searching, I use the Open File In Solution plug-in from http://npp.incrediblejunior.com.