How can I make a script return a directory in UPBGE?

I want to test to see if a directory exists so that if it does, then getBlendFileList is used. If getBlendFileList is used and the directory isn’t found or does not exist, there is a bug in which the entire GE will crash. I therefore want to make it so I can return a directory I can specify (e.g levels) if it exists and if not, just return the result as the current directory or something else UPBGE will not crash in.

Use os.path.exists() to determine whether a path exists.

import bge

def main(self):
    if os.path.exists("D:\\Blender\\Projects"):
       print("File-path exists.")
       print("File-path doesn't exist.")