How to use the pdf2image.exceptions.PDFInfoNotInstalledError function in pdf2image

def test_pdfinfo_not_installed_throws(self):
        start_time = time.time()
        try:
            images_from_path = convert_from_path("./tests/test_14.pdf")
            raise Exception("This should not happen")
        except PDFInfoNotInstalledError as ex:
            pass

        print(
            "test_pdfinfo_not_installed_throws: {} sec".format(
                (time.time() - start_time) / 14.0
            )

sf = field.split(":")
            key, value = sf[0], ":".join(sf[1:])
            if key != "":
                d[key] = (
                    int(value.strip())
                    if key in PDFINFO_CONVERT_TO_INT
                    else value.strip()
                )

        if "Pages" not in d:
            raise ValueError

        return d

    except OSError:
        raise PDFInfoNotInstalledError(
            "Unable to get page count. Is poppler installed and in PATH?"
        )
    except ValueError:
        raise PDFPageCountError(
            "Unable to get page count.\n%s" % err.decode("utf8", "ignore")
        )