関連ワード:  python get all files from subdirectories    python get all files in subfolders    python get files from subfolders    python list all files in subfolders    python find all files in subfolders    python get all files from directory and subdirectories    python get all files in subdirectories with extension    python list all files subdirectories    python get all files in folder and subfolders    python move all files from subfolders to main folder