def page_dumb(strng, start=0, screen_lines=25):
    """Very dumb 'pager' in Python, for when nothing else works.

    Only moves forward, same interface as page(), except for pager_cmd and
    mode."""

    out_ln = strng.splitlines()[start:]
    screens = chop(out_ln, screen_lines - 1)
    if len(screens) == 1:
        print(os.linesep.join(screens[0]), file=io.stdout)
    else:
        last_escape = ""
        for scr in screens[0:-1]:
            hunk = os.linesep.join(scr)
            print(last_escape + hunk, file=io.stdout)
            if not page_more():
                return
            esc_list = esc_re.findall(hunk)
            if len(esc_list) > 0:
                last_escape = esc_list[-1]
        print(last_escape + os.linesep.join(screens[-1]), file=io.stdout)