import os path_1 = 'fire-8/train/newlabels' path_2 = 'fire-8/train/labels' file_1 = os.listdir(path_1) file_2 = os.listdir(path_2) d = dict() for i in range(len(file_1)): d[file_1[i]] = 1 for i in range(len(file_2)): if file_2[i] not in d: print(file_2[i])