human
I wrote the below code

    from calibre.gui2 import gprefs
    pl = get_plugin(category, name)
    d = ConfigDialog(parent)
    d.resize(750, 550)
    conf_name = ('config_widget_dialog_geometry_%s_%s' % (category, name))
    geom = gprefs.get(conf_name, None)
    d.setWindowTitle((_('Configure    ') + pl.gui_name))
    d.setWindowIcon(QIcon(I('config.png')))
    bb = QDialogButtonBox(d)
    bb.setStandardButtons(((bb.Apply | bb.Cancel) | bb.RestoreDefaults))
    bb.accepted.connect(d.accept)
    bb.rejected.connect(d.reject)
    w = pl.create_widget(d)
    d.set_widget(w)
    bb.button(bb.RestoreDefaults).clicked.connect(w.restore_defaults)
    bb.button(bb.RestoreDefaults).setEnabled(w.supports_restoring_to_defaults)
    bb.button(bb.Apply).setEnabled(False)
    bb.button(bb.Apply).clicked.connect(d.accept)
    def onchange():
        b = bb.button(bb.Apply)
        b.setEnabled(True)
        b.setDefault(True)
        b.setAutoDefault(True)
    w.changed_signal.connect(onchange)
    bb.button(bb.Cancel).setFocus(True)
    l = QVBoxLayout()
    d.setLayout(l)
    l.addWidget(w)
    l.addWidget(bb)
    mygui = (gui is None)
    if (gui is None):
        gui = init_gui()
        mygui = True
    w.genesis(gui)
    w.initialize()
    if (geom is not None):
        d.restoreGeometry(geom)
    d.exec_()
    geom = bytearray(d.saveGeometry())
    gprefs[conf_name] = geom
    rr = getattr(d, 'restart_required', False)
    if (show_restart_msg and rr):
        from calibre.gui2 import warning_dialog
        warning_dialog(gui, 'Restart    required', 'Restart    required', show=True)
    if (mygui and (not never_shutdown)):
        gui.shutdown()
    return rr

What's a good function header?

Here's a good function header?
assistant
#Here's a good function header.

def show_config_widget(category, name, gui=None, show_restart_msg=False, parent=None, never_shutdown=False):