所以我的 python 文件中有一个类，我想将它与主 python 文件分开，因为我需要修改它几次并在主文件中使用它。但是，由于该类需要访问 kivy 文件以读取 ID，因此我无法将此类与主类分开，而不会两次加载 kv 文件，这会将一切搞砸。我怎样才能基本上使这个类可以导入？

class RightSide(BoxLayout):
    order_size = []
    overlay = StringProperty('Current Order will be displayed here')
    tabname = parameter_length
    iterator = 0

    def __init__(self,**kwargs):
        super().__init__(**kwargs)
        self.orientation = 'vertical'

        for i in range(len(menu)):
            self.add_widget(Skeleton())

    def tally(self):
        global OID
        order_size = self.order_size
        print(OID)
        OID = OID + 1
        print(OID)
        rightside = kv.ids.one.two.three.newlay.rightside
        for skel in rightside.children:
            if isinstance(skel,Skeleton):
                if self.iterator > len(menu)-1:
                    self.iterator = 0
                    order_size.clear()

                self.tabname[self.iterator] = skel.drink_name,skel.ids.label_id.text
                self.iterator = self.iterator + 1
                order_size.insert(0,skel.ids.label_id.text)

        order_size.insert(0,OID)

        self.tabname.reverse()
        self.tabname.insert(0,OID)

        makeitastring = ''.join(map(str,self.tabname))
        self.overlay = makeitastring
        con = sql.connect(host='xxxxxx',user='root',password='xxxxxxx.',database='new_schema')
        cur = con.cursor()




        cur.execute(query,order_size)



        con.commit()
        con.close()



    def clean(self):
        rightside = kv.ids.one.two.three.newlay.rightside
        for skel in rightside.children:
            if isinstance(skel,Skeleton):
                skel.ids.label_id.text = '0'
                skel.count = 0




kv = Builder.load_file("b.kv")