Auto execute python in USB flash disk

[Brian Erhard]

I am still fairly new to python and wanted to attempt a home made
password protection program.  There are files that I carry on a USB
flash drive that I would like to password protect.  Essentially, I
would like to password protect an entire directory of files.  Is there
a way to auto execute a python script after a user double clicks to
open a folder on the USB drive? How can you capture that double click
event on a specific folder?

Thanks.