TypeError:object .__ init __()接受一个参数(要初始化的实例) [英] TypeError: object.__init__() takes exactly one argument (the instance to initialize)

问题描述

我正在尝试制作一个表单应用程序，但我不理解该错误:

I am trying to make a form app and I don t understand the error:

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

此处提供代码；

class Myapp(App):
    def build(self):
        return Grid1()

class Grid1(GridLayout):
    def __init__(self,**kwargs):
        super(Grid1,self).__init__(**kwargs)
        self.cols=1

        self.inside=GridLayout()
        self.inside.cols=2

        self.inside.add_widget(Label(text="Your name is :"))
        self.name=TextInput(multiline=False)
        self.inside.add_widget(self.name)


        self.inside.add_widget(Label(text="Your Last name is :"))
        self.lastname=TextInput(multiline=False)
        self.inside.add_widget(self.lastname)


        self.inside.add_widget(Label(text="Your email is :"))
        self.email=TextInput(multiline=False)
        self.inside.add_widget(self.email)

        self.submit=Button(text="Submit",font=40)
        self.add_widget(self.submit)

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

错误

File ".\kivyprima.py", line 38, in <module> Myapp().run()
File "C:\Users\Alex\AppData\Local\Programs\Python\Python37\lib\site-packages\kivy\app.py", line 829, in run root = self.build()
File ".\kivyprima.py", line 10, in build return Grid1()
File ".\kivyprima.py", line 34, in init self.submit=Button(text="Submit",font=40)
File "C:\Users\Alex\AppData\Local\Programs\Python\Python37\lib\site-packages\kivy\uix\behaviors\button.py", line 121, in init

推荐答案

好，因此错误实际上不是不是，在您的super(Grid1,self).__init__(**kwargs)语句中，这是在创建 Submit 按钮.您做到了:

OK, so the error is actually not in your super(Grid1,self).__init__(**kwargs) statement, it's in the creation of the Submit button. You did:

self.submit = Button(text="Submit", font=40)
self.add_widget(self.submit)

但是正如文档所述，字体大小由 font_size 而不是 font 设置.该代码应为:

But as the docs say, the font size is set by font_size and not font. The code should be:

self.submit = Button(text="Submit", font_size=40)
self.add_widget(self.submit)

这应该很好.

只想感谢@chepner指出这一点:

Just want to thank @chepner for pointing this out:

请注意，问题出在那是字体无法被 按钮(或其他任何按钮)只是沿链向上传递，直到 最终传递给object.__init__(这会引发错误 简单地忽略意外的参数).

Note that the issue, then, is that font, not being recognized by Button (or anyone else), is simply passed on up the chain until it is ultimately passed to object.__init__ (which raises an error instead of simply ignoring unexpected arguments).

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