Question

这个程序有什么问题。我得到名称错误：

NameError：name＆＃39; sum1＆＃39;未定义

import os
from kivy.app import App
from kivy.uix.filechooser import FileChooserListView
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.uix.popup import Popup
from kivy.lang.builder import Builder


Builder.load_string('''
<WarningPopup@Popup>:
    title: 'Warning'
    size_hint: None, None
    size: 400, 200

    BoxLayout:
        orientation: "vertical"
        Label:
            text: 'Do you really want to delete this element?'
        BoxLayout:
            size_hint_y: 0.3
            Button:
                text: "Cancel"
                on_release: root.dismiss()
            Button:
                text: "Accept"
                on_release:
                    root.parent_inst.delete()
                    root.dismiss()
''')


class WarningPopup(Popup):
    def __init__(self, parent_inst, *args,  **kwargs):
        super(WarningPopup, self).__init__(*args, **kwargs)
        self.parent_inst = parent_inst


class MainWindow(BoxLayout):
    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)
        self.orientation = "vertical"
        self.fichoo = FileChooserListView()
        self.popup = WarningPopup(self)
        btn_delete = Button(text="Delete", on_release=self.popup.open, size_hint_y=0.1)

        self.add_widget(self.fichoo)
        self.add_widget(btn_delete)

    def delete(self, *args):
        os.remove(self.fichoo.selection[0])
        self.fichoo._update_files()


class ExampleApp(App):
    def build(self):
        return MainWindow()

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

Answer 1

你在return语句中有错误。

return self.sum1(self.a, self.b)

Answer 2

只要你在课堂上，就必须：

class sum:
    def sum1(self,a,b):
        self.c=a+b
        return self.c

   def init(self,a,b):
       self.a=a
       self.b=b
       return self.sum1(self.a,self.b)

d=sum()
a=6
b=7
h=d.init(a,b)
print(h)

您没有在sum1的{{1}}调用前加self：

return self.sum1(self.a,self.b)

纠正我的名字错误

2 个答案: