def export_partlist_to_file(input, output, timeout=20, showgui=False):
    '''
    call eagle and export sch or brd to partlist text file

    :param input: .sch or .brd file name
    :param output: text file name
    :param timeout: int
    :param showgui: Bool, True -> do not hide eagle GUI
    :rtype: None
    '''
    input = norm_path(input)
    output = norm_path(output)

    commands = export_command(output=output, output_type='partlist')
    command_eagle(
        input=input, timeout=timeout, commands=commands, showgui=showgui)