def classifier(pdf_file):

    with open(pdf_file,"rb") as f:

        pdf = fitz.open(f)

        res = []

        for page in pdf:

            image_area = 0.0

            text_area = 0.0

            for b in page.get_text("blocks"):

                if '<image:' in b[4]:

                    r = fitz.Rect(b[:4])

                    image_area = image_area + abs(r)

                else:

                    r = fitz.Rect(b[:4])

                    text_area = text_area + abs(r)

            if image_area == 0.0 and text_area != 0.0:

                res.append(1)

            if text_area == 0.0 and image_area != 0.0:

                res.append(0) 

        return res