提问者:小点点

Python kivy:如何修复TypeError:对象。__init__()不带参数?


我这里的代码有问题。我想在python文件中实现一个带有kv语言数据的字符串,以便为“MDTextFieldClear”添加一个设计。我不确定错误是否必须出现在kv字符串中,但在对类和kv字符串的缩进进行了一些测试之后,我认为这可能是原因。下面是一些代码:

from kivymd.theming import ThemeManager
from kivymd.textfields import MDTextFieldClear    # KivyMD imports

class LayoutPy(FloatLayout):    # Widget class
    def __init__(self, **kwargs):
        super(LayoutPy, self).__init__(**kwargs)
        self.get_voc = MDTextFieldClear(helper_text="Please enter the translation", helper_text_mode="on_focus", max_text_length=12, multiline=False, color_mode="accent")
        self.add_widget(self.get_voc)

        # ... (few more widgets) ...#

Builder.load_string("""
#:import MDTextField kivymd.textfields.MDTextField
#:import MDTextFieldRound kivymd.textfields.MDTextFieldRound
#:import MDTextFieldClear kivymd.textfields.MDTextFieldClear
#:import MDTextFieldRect kivymd.textfields.MDTextFieldRect

<LayoutPy>:
    orientation: 'vertical'
    FloatLayout:
        MDTextFieldClear:
            hint_text: ""
            helper_text: "Enter translation"
            helper_text_mode: "on_focus"
            max_text_length: 10
""")

class KivyGUI(App):          # Main class for build
    theme_cls = ThemeManager()
    theme_cls.primary_palette = ("Blue")
    title = ('Lingu Trainer')
    main_widget = None

    def build(self):
        c = LayoutPy()
        d = Factory.TextFields()
        return c


if __name__ == "__main__":
    KivyGUI().run()

错误如下:

回溯(最近一次调用last):KivyGUI()中第106行的文件“PATH_TO_MY_PYTHON_File”。运行()

文件“C:\Users\username\Anaconda3\lib\site packages\kivy\app.py”,第800行,在run root=self中。构建()

文件“路径到我的PYTHON文件”,第100行,在build c=LayoutPy()中

文件“路径到我的PYTHON文件”,第54行,在init self中。get_voc=MDTextFieldClear(helper_text=“请输入翻译”,helper_text_mode=“on_focus”,max_text_length=12,multiline=False,color_mode=“accent”)

文件"C:\用户\用户名\Anaconda3\lib\site-包\kivy\uix\boxlayout.py",第131行,在init超级(BoxLayout,自我). init(**kwargs)

文件“C:\Users\username\Anaconda3\lib\site packages\kivy\uix\layout.py”,第76行,在init super(layout,self)中。初始(**kwargs)

文件“C:\Users\username\Anaconda3\lib\site packages\kivy\uix\widget.py”,第340行,在init super(widget,self)中。初始(**kwargs)

文件“kivy_event.pyx”,第243行,基维语。_event。EventDispatcher.initTypeError:object.init()不带参数


共1个答案

匿名用户

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

错误是由于属性、color\u mode和/或多行造成的。

在kv文件中,为类规则

以下示例使用BoxLayout作为根。

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout

from kivymd.theming import ThemeManager
from kivymd.textfields import MDTextFieldClear


class LayoutPy(BoxLayout):

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

        self.get_voc = MDTextFieldClear(helper_text="Please enter the translation",
                                        helper_text_mode="on_focus", max_text_length=12,
                                        hint_text="Created in py"
                                        )
        self.add_widget(self.get_voc)


Builder.load_string("""
#:import MDTextFieldClear kivymd.textfields.MDTextFieldClear

<LayoutPy>:
    orientation: 'vertical'

    FloatLayout:
        MDTextFieldClear:
            hint_text: "kv: Created"
            helper_text: "Enter translation"
            helper_text_mode: "on_focus"
            max_text_length: 10

""")


class KivyGUI(App):
    theme_cls = ThemeManager()
    theme_cls.primary_palette = "Blue"
    title = 'Lingu Trainer'

    def build(self):
        return LayoutPy()


if __name__ == "__main__":
    KivyGUI().run()