kivy dynamic class

noah_g4
(usa Ubuntu)

Enviado em 18/08/2020 - 11:14h

Estou criando app em python3-kivy e preciso colocar uma classe dinamica como um layout mas quando eu fasso isso ele me da um erro do qual não consigo identifiar

codigo py:

from kivy.app import App

from kivy.uix.gridlayout import GridLayout



class index(GridLayout):

    pass



class scrscr(App):

    def build(self):

        return index()



scrscr().run()



 

codigo kv:

<index>:

        cols: 3

        rows: 1

        BoxLayout:

                orientation: "vertical"

                size_hint_x: None

                width: 120

                Button:

                        text: "scr1"

                Button:

                        text: "scr2"

                Button:

                        text: "scr3"

        scrone

<scrone@BoxLayout>:

        Button:

                text: "btn1"

        Label:

                text: "lbl1"

<scrtow@BoxLayout>:

        Button:

                text: "btn2"

        Label:

                text: "lbl2"

 

erro:

Traceback (most recent call last):

   File "scrscr.py", line 11, in <module>

     scrscr().run()

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/app.py", line 949, in run

     self._run_prepare()

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/app.py", line 918, in _run_prepare

     self.load_kv(filename=self.kv_file)

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/app.py", line 691, in load_kv

     root = Builder.load_file(rfilename)

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/lang/builder.py", line 306, in load_file

     return self.load_string(data, **kwargs)

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/lang/builder.py", line 373, in load_string

     parser = Parser(content=string, filename=fn)

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/lang/parser.py", line 402, in __init__

     self.parse(content)

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/lang/parser.py", line 511, in parse

     objects, remaining_lines = self.parse_level(0, lines)

   File "/home/noah/.local/lib/python3.8/site-packages/kivy/lang/parser.py", line 674, in parse_level

     if current_property[:3] == 'on_':

 TypeError: 'NoneType' object is not subscriptable