How to use the filetype.types.image.Dcm function in filetype

# Supported image types
IMAGE = (
    image.Jpeg(),
    image.Jpx(),
    image.Png(),
    image.Gif(),
    image.Webp(),
    image.Cr2(),
    image.Tiff(),
    image.Bmp(),
    image.Jxr(),
    image.Psd(),
    image.Ico(),
    image.Heic(),
    image.Dcm(),
)

# Supported video types
VIDEO = (
    video.Mp4(),
    video.M4v(),
    video.Mkv(),
    video.Mov(),
    video.Avi(),
    video.Wmv(),
    video.Mpeg(),
    video.Webm(),
    video.Flv(),
)

# Supported audio types

def match(self, buf):
        return (len(buf) > Dcm.OFFSET + 4 and
                buf[Dcm.OFFSET + 0] == 0x44 and
                buf[Dcm.OFFSET + 1] == 0x49 and
                buf[Dcm.OFFSET + 2] == 0x43 and
                buf[Dcm.OFFSET + 3] == 0x4D)

def __init__(self):
        super(Dcm, self).__init__(
            mime=Dcm.MIME,
            extension=Dcm.EXTENSION
        )

def __init__(self):
        super(Dcm, self).__init__(
            mime=Dcm.MIME,
            extension=Dcm.EXTENSION
        )

def __init__(self):
        super(Dcm, self).__init__(
            mime=Dcm.MIME,
            extension=Dcm.EXTENSION
        )