関連ワード:  python check all files in directory    python get all files in directory    python get all files in directory and subdirectories    python get all files in directory recursively    python get all files in directory with extension    python search all files in directory and subdirectories for string    python get all files in directory matching pattern    python search all files in directory    python get all files in directory recursively with extension    python get all files in directory with specific extension