List files

# unicode(folderPath) for non ascii characters in file/folder names

# list .mkv files in folder
movieFiles = [folderPath + "/" + i for i in os.listdir(unicode(folderPath)) if i.endswith(".mkv")]


# does the same recursively with os.walk
movieFiles = [os.path.join(dp, f) for dp, dn, filenames in os.walk(unicode(folderPath)) for f in filenames if
              os.path.splitext(f)[1] == '.mkv']