work with files

import os

#get files in path
PATH = "C:\\YourFolder\\"
files = [f for f in os.listdir(PATH) if os.path.isfile(os.path.join(PATH, f))]
print(files) #Outputs list of files in PATH

#get extension of any file
file = 'example.php'
ext = os.path.splitext(file)[0]
print(ext) #Outputs php