AttributeError: 'super' object has no attribute '__getattr__'
Esra Issam
Elliot Garbus
The issue: The kv code has not yet been processed when the __init__ code is executed. This means the ids dict has not yet been populated. This results in the error.
Instead of using __init__(), use on_kv_post(). This is executed after the kv code has been processed.
class WelcomeScreen(Screen):
def on_kv_post(self, base_widget):
# super(Screen,self).__init__(**kwargs)
box1 =self.ids.box
box1.add_widget(FigureCanvasKivyAgg(plt.gcf()))
on_kv_post is a Widget event. See: https://kivy.org/doc/stable/api-kivy.uix.widget.html?highlight=on_kv_post#kivy.uix.widget.Widget
This approach will work if you want to create the screen once when the screen is instanced, much like __init__(). If you need to create a plot each time the screen is displayed you could use the Screen event on_pre_enter. See: https://kivy.org/doc/stable/api-kivy.uix.screenmanager.html?highlight=screenmanager#kivy.uix.screenmanager.Screen
From: Esra Issam
Sent: Wednesday, August 24, 2022 3:54 AM
To: Kivy users support
Subject: [kivy-users] AttributeError: 'super' object has no attribute '__getattr__'
Hello
I am trying to add a chart to a screen using the __init__ because I want it to appear as soon as the screen appear, and I have more than one screen.
I get this error when I run the code and I could not figure out the reason of it.
any help please?
error:
python code:
kv code:
if you need please find the attachment
thank you in advanced
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