1
I’m learning the kivy (so I’m pretty virgin in the Gui subject) and I came across this mistake:
important part: Attributeerror: 'weakref' Object has no attribute 'cline_in_traceback'
full run:
[INFO ] [Logger ] Record log in /home/albuquerque/.kivy/logs/kivy_19-04-21_53.txt
[INFO ] [Kivy ] v1.11.0.dev0, git-eec3a30, 20190421
[INFO ] [Python ] v3.6.7 (default, Oct 22 2018, 11:32:17)
[GCC 8.2.0]
[INFO ] [Factory ] 184 symbols loaded
[INFO ] [Image ] Providers: img_tex, img_dds, img_sdl2, img_pil, img_gif (img_ffpyplayer ignored)
[INFO ] [Text ] Provider: sdl2
[INFO ] [Window ] Provider: sdl2(['window_egl_rpi'] ignored)
[INFO ] [GL ] Using the "OpenGL" graphics system
[INFO ] [GL ] Backend used <sdl2>
[INFO ] [GL ] OpenGL version <b'4.6.0 NVIDIA 390.116'>
[INFO ] [GL ] OpenGL vendor <b'NVIDIA Corporation'>
[INFO ] [GL ] OpenGL renderer <b'GeForce GT 730M/PCIe/SSE2'>
[INFO ] [GL ] OpenGL parsed version: 4, 6
[INFO ] [GL ] Shading version <b'4.60 NVIDIA'>
[INFO ] [GL ] Texture max size <16384>
[INFO ] [GL ] Texture max units <32>
[INFO ] [Window ] auto add sdl2 input provider
[INFO ] [Window ] virtual keyboard not allowed, single mode, not docked
Traceback (most recent call last):
File "kivy/properties.pyx", line 840, in kivy.properties.ObservableDict.__getattr__
KeyError: 'box'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "main.py", line 19, in <module>
Test().run()#O método run() inicializa o app
File "/home/albuquerque/.local/lib/python3.6/site-packages/kivy/app.py", line 829, in run
root = self.build()
File "main.py", line 16, in build
return Tarefas(["a","b", "c"])
File "main.py", line 10, in __init__
self.ids.box.add_widget(Label(text=tarefa, font_size=30))#procura nos ids da classe no arquivo text.kv o id box
File "kivy/properties.pyx", line 843, in kivy.properties.ObservableDict.__getattr__
AttributeError: 'super' object has no attribute '__getattr__'
Exception ignored in: functools.partial(<function _widget_destructor at 0x7f5c199612f0>, 3)
Traceback (most recent call last):
File "/home/albuquerque/.local/lib/python3.6/site-packages/kivy/uix/widget.py", line 265, in _widget_destructor
File "/home/albuquerque/.local/lib/python3.6/site-packages/kivy/lang/builder.py", line 760, in unbind_widget
File "kivy/weakproxy.pyx", line 32, in kivy.weakproxy.WeakProxy.__getat
the interface screen does not even open
below are the codes:
main py.
from kivy.app import * #importar os métodos de APPP do kivy
from kivy.uix.boxlayout import BoxLayout #empilha os widgets como se fossem caixas
from kivy.uix.label import Label
from kivy.uix.scrollview import ScrollView
class Tarefas(ScrollView):
def __init__(self, tarefas, **kwargs): #keyword arguments, o incrivel é que ele executa os argumentos colocados a mais
super().__init__(**kwargs)#chama as funções da classe BoxLayout
for tarefa in tarefas:
self.ids.box.add_widget(Label(text=tarefa, font_size=30))#procura nos ids da classe no arquivo text.kv o id box
class Test(App):#primeiro arquivo que o kivy procura (no caso, Text.kv)
def build(self): #Métod o que constroi o aplicativo
return Tarefas(["a","b", "c"])
Test().run()#O método run() inicializa o app
test.Kv
<Tarefas>:
BoxLayout:
id:box #identificação do widget
orientation:"vertical"
size_hint_y:None
height:self.minimum_height
I’m kind of desperate, so if you can help me, I’m desperately grateful :D:
I really appreciate your reply, friend. How should I write the second line of your code (Builder.load_file('test.Kv')) in my code? within the Tasks class or external code?
– Gustavo Ramalho
I believe the problem is not that, since in the kivy documentation it says that it knows . Kv if it has the class name and such
– Gustavo Ramalho
Yes, it does, but the class and main.py have to be called Testapp and Kv has to be called Test.Kv.
– tomasantunes