После запуска программы Kivy вылетает без какого-либо сообщения об ошибке

Question

Я пытаюсь запрограммировать GUI с помощью kivy в python. До этого вопроса у меня уже была проблема с моим кодом, которая была решена:
Ошибка Kivy при попытке изменить экран
Теперь, когда я запускаю программу, экран становится белым и вылетает без ошибок сообщение.
Я пытаюсь переключить экран, когда нажимаю одну из кнопок на экране меню.

Stacktrace:

[INFO   ] [Kivy        ] v1.10.1
[INFO   ] [Python      ] v3.6.7 (default, Feb 28 2019, 07:28:18) [MSC v.1900 64 bit (AMD64)]
[INFO   ] [Factory     ] 194 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
[INFO   ] [GL          ] Using the "OpenGL" graphics system
[INFO   ] [GL          ] GLEW initialization succeeded
[INFO   ] [GL          ] Backend used <glew>
[INFO   ] [GL          ] OpenGL version <b'4.5.0 NVIDIA 385.54'>
[INFO   ] [GL          ] OpenGL vendor <b'NVIDIA Corporation'>
[INFO   ] [GL          ] OpenGL renderer <b'GeForce GTX 1050 Ti/PCIe/SSE2'>
[INFO   ] [GL          ] OpenGL parsed version: 4, 5
[INFO   ] [GL          ] Shading version <b'4.50 NVIDIA'>
[INFO   ] [GL          ] Texture max size <32768>
[INFO   ] [GL          ] Texture max units <32>
[INFO   ] [Window      ] auto add sdl2 input provider
[INFO   ] [Window      ] virtual keyboard not allowed, single mode, not docked

Process finished with exit code -1073741819 (0xC0000005)

Surface.py:

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy_app_go.Control import HelperMethods
from kivy.properties import ObjectProperty
from kivy.graphics import Rectangle, Color, Line
from kivy.uix.label import Label
from kivy.uix.floatlayout import FloatLayout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.button import Button
from kivy.core.window import Window
from kivy.uix.screenmanager import FadeTransition

from functools import partial


class MenuScreen(Screen):
    def __init__(self, **kwargs):
        super(Screen, self).__init__(**kwargs)
        self.ScreenSize = Window.size
        self.HelperMethodsInst = HelperMethods()
        self.app = App.get_running_app()

        lytmain = FloatLayout(size=self.ScreenSize)
        lytbutton = BoxLayout(pos_hint={"y": 0.1, "x": 0.15}, size_hint=(2, 0.6), orientation='vertical', size=self.ScreenSize)

        lblHeadline = Label(text="Choose your Go Mode", font_size=40, pos_hint={"y": 0.8, "x": 0.325},
                            size_hint=(0.35, 0.15))
        btnHvH = Button(text="Human vs Human", size_hint=(0.35, 0.15),
                        on_release=lambda *args: self.HelperMethodsInst.switch_screen(goal_screen="go_screen", Screenmanager=self.app.WindowManagerInst.get_ScreenManager))
        btnHvB = Button(text="Human vs Bot", size_hint=(0.35, 0.15),
                        on_release=lambda *args: self.HelperMethodsInst.switch_screen(goal_screen="go_screen", Screenmanager=self.app.WindowManagerInst.get_ScreenManager))
        btnBvB = Button(text="Bot vs Bot", size_hint=(0.35, 0.15),
                        on_release=lambda *args: self.HelperMethodsInst.switch_screen(goal_screen="go_screen", Screenmanager=self.app.WindowManagerInst.get_ScreenManager))

        self.add_widget(lytmain)
        lytmain.add_widget(lblHeadline)
        lytmain.add_widget(lytbutton)
        lytbutton.add_widget(btnHvH)
        lytbutton.add_widget(btnHvB)
        lytbutton.add_widget(btnBvB)



class GoScreen(Screen):
    def __init__(self, **kwargs):
        super(GoScreen, self).__init__(**kwargs)
        self.ScreenSize = Window.size

        lytmain = FloatLayout(size=self.ScreenSize)

        btnBack = Button(text="Back", size_hint=(0.25, 0.1))

        self.add_widget(lytmain)
        lytmain.add_widget(btnBack)


class WindowManager(ScreenManager):
    def __init__(self):
        # self.sm = ScreenManager(transition=FadeTransition(duration=0.15))
        self.add_widget(MenuScreen(name="menu_screen"))
        self.add_widget(GoScreen(name="go_screen"))

    @property
    def get_ScreenManager(self):
        return self


class Surface(App):
    def __init__(self):
        super().__init__()
        self.WindowManagerInst = WindowManager()

    def build(self):
        return self.WindowManagerInst

    @staticmethod
    def create_Surface():
        return Surface().run()


def run():
    SurfaceInst = Surface()
    HelperMethodsInst = HelperMethods()

Control.py:

from kivy.uix.screenmanager import ScreenManager, Screen


class HelperMethods:
    def switch_screen(self, Screenmanager, goal_screen):
        print("pressed")
        print(screenmanager)
        print(screen)
        screenmanager = goal_screen

main.py:

from kivy_app_go.Surface import Surface

if __name__ == "__main__":
    Surface.create_Surface()

Надеюсь, кто-нибудь может мне помочь ^^

Answer 1

В вашем классе WindowManager необходимо изменить метод __init__, чтобы включить вызов super:

class WindowManager(ScreenManager):
    def __init__(self):
        super(WindowManager, self).__init__()
        # self.sm = ScreenManager(transition=FadeTransition(duration=0.15))
        self.add_widget(MenuScreen(name="menu_screen"))
        self.add_widget(GoScreen(name="go_screen"))