问无法识别以下错误: TypeError: object.init()只接受一个参数(要初始化的实例)
EN

Stack Overflow用户

提问于 2021-03-22 20:39:30

回答 1查看 1.2K关注 0票数 0

我对编程非常陌生，目前我正在跟踪一个视频，为一个项目开发一个应用程序。我似乎不明白是什么导致了下面的错误。

TypeError: object.__init__() takes exactly one argument (the instance to initialize)

代码如下：(第一个文件)

class MainApp(App):
    my_friend_id = 1
    def build(self):
        return GUI

    def on_start(self):
        # get database data
        result = requests.get("https://wearable-balance-belt1-default-rtdb.firebaseio.com/" + str(self.my_friend_id) +".json")
        data = json.loads(result.content.decode())
        # get and update avatar
        avatar_image = self.root.ids['home_screen'].ids['avatar_image']
        avatar_image.source = "icons/" + data['avatar']

        banner_grid = self.root.ids['home_screen'].ids['banner_grid']
        workouts = data['workouts'][1:]
        for workout in workouts:
            W = WorkoutBanner(workout_image=workout['workout_image'], description=workout['description'])
            banner_grid.add_widget(W)


    def change_screen(self, screen_name):
        # get the screen manager from the kv file
        screen_manager = self.root.ids['screen_manager']
        screen_manager.current = screen_name
        # screen_manager = self.root.ids


MainApp().run()

第二档案；

from kivy.uix.gridlayout import GridLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.label import Label
from kivy.uix.image import Image

class WorkoutBanner(GridLayout):
    rows = 1

    def __init__(self, **kwargs):
        super(WorkoutBanner, self).__init__(**kwargs)

        #left floatlayout
        left = FloatLayout()
        left_image = Image(source="icons/" + kwargs['workout_image'], size_hint=(1, .8), pos_hint={"top": 1, "left": 1})
        left_label = Label(text=kwargs['description'], size_hint=(1, .2), post_hint={"top": .2, "left": 1})
        left.add_widget(left_image)
        left.add_widget(left_label)

        self.add_widget(left)

我能得到的任何帮助都是非常感谢的！

python

kivy

mobile-application

向量数据库

传统知识库搭建耗时费力？腾讯云向量数据库 + Dify混合检索，轻松实现高效知识管理与精准问答！

回答 1

Stack Overflow用户

发布于 2021-03-23 05:16:34

此错误通常是由于将意外参数传递给基类(object类) __init__()方法造成的。在您的示例中，workout_image和description关键字参数将被传递给超类，并最终传递给object类。您可以通过使用kwargs.pop()在__init__()方法__init__() WorkoutBanner中调用WorkoutBanner之前删除这些参数来纠正这一点。一个更简单的方法是为这两个参数定义属性，让kivy处理保存并从kwargs中删除它们，如下所示：

class WorkoutBanner(GridLayout):
    rows = 1
    workout_image = StringProperty('')
    description = StringProperty('')

    def __init__(self, **kwargs):
        super(WorkoutBanner, self).__init__(**kwargs)

        #left floatlayout
        left = FloatLayout()
        left_image = Image(source="icons/" + self.workout_image, size_hint=(1, .8), pos_hint={"top": 1, "left": 1})
        left_label = Label(text=self.description, size_hint=(1, .2), pos_hint={"top": .2, "left": 1})
        left.add_widget(left_image)
        left.add_widget(left_label)

        self.add_widget(left)