您可以使用
os.path.splitextwhich采取路径并将文件扩展名从其末尾分割：
import osrootdir = 'input'extensions = ('.mp4', '.avi', '.wmv')for subdir, dirs, files in os.walk(rootdir): for file in files: ext = os.path.splitext(file)[-1].lower() if ext in extensions: print (os.path.join(subdir, file))
