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 os
rootdir = '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))
602392714
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