How to get variable(instance) from one class to another variable(instance) class in python

[Siddanth Shaiva]

Enter code here...

class WelcomeScreen(Screen): #welcomeScreen subclass
    def __init__(self, **kwargs): #constructor method
        super(WelcomeScreen, self).__init__(**kwargs)
        welcomePage = FloatLayout()
        box = BoxLayout(orientation='vertical', size_hint=(0.4, 0.3),
                                       padding=8, pos_hint={'top': 0.5, 'center_x': 0.5})
        self.cameraObject = Camera(play=False)  ## WANT TO USE THIS VARIABLE IN OTHER CLASS
        self.cameraObject.play = True
        self.cameraObject.resolution = (700, 400)
        self.add_widget(self.cameraObject)

class FunctionScreen(Screen):  
    def __init__(self, **kwargs): 
        super(FunctionScreen, self).__init__(**kwargs) #init parent

        functionPage = FloatLayout()
        functionLabel = Label(text='what functions to use',
                          halign='center', valign='center', size_hint=(0.4,0.2), pos_hint={'top': 1, 'center_x': 0.5})
        self.img = self.cameraObject ## HERE I WANT TO USE 'self.cameraObject' VARIABLE

How do i get "self.cameraObject" of WelcomeScreen() class instance to "self.img" instance of FunctionScreen()

[Elliot Garbus]

I assume these 2 screens are attached to the same screen manager. 

 

Inside a screen, self.manager refers the screenmanager.

 

self.manager.get_scereen(‘screen_name’)  refers to the screen.  I’ll assume you are setting the screen name in your kv code.  I’ll use ‘welcome_screen’ as the name.

 

self.manager.get_screen(‘welcome_screen’).cameraObject

 

To access the cameraObject attribute.

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