How to open a photo in kivy using filechooser?

Question

Python

There is no way to change the value of self.image.source to the path for the file. Various errors are thrown
Here is the code itself

class SaveLoad(FloatLayout):
    save = ObjectProperty(None)
    image = ObjectProperty(None)
    cancel = ObjectProperty(None)

class LoadDialog(FloatLayout):
    load = ObjectProperty(None)
    cancel = ObjectProperty(None)

class Root(FloatLayout):
    loadfile = ObjectProperty(None)
    image = ObjectProperty(None)

    def load(self, path, file):
        # та самая проблемная строка
        path = os.path.join(path, file[0])
        self.image.source = path
        dismiss_popup()

    def dismiss_popup(self):
        self._popup.dismiss()

    def openFile(self):
        if camera == 0:
            content = LoadDialog(load=self.load, cancel=self.dismiss_popup)
            self._popup = Popup(title="Open File", content=content, size_hint=(0.9, 0.9))
            self._popup.open()
        else :
            print("Error")

in kv file

Root:
    BoxLayout:
        orientation: 'vertical'
        size_hint: (1, 1)
        GridLayout:
            cols: 1
            size_hint: (1, .2)
            Button:
                text: "Open\nfile"
                on_press: root.openFile()
        BoxLayout:
            orientation: "horizontal"
            padding: (190, 27)
            Image:
                id: image
                source: 'image/white-background.jpg'
                size_hint: (None, None)
                size: (300 ,300)
# Окно с файловым менеджером
<LoadDialog>:
    BoxLayout:
        orientation: 'vertical'
        size: root.size
        pos: root.pos
        FileChooserIconView:
            id: filechooser
            path: '~/'
        BoxLayout:
            orientation: 'horizontal'
            size_hint_y: None
            height: 40
            Button:
                text: "Close"
                on_press: root.cancel()
            Button:
                text: "Load File"
                on_press: root.load(filechooser.path, filechooser.selection)

Throws this error

File "/home/karacb/.local/lib/python3.7/site-packages/kivy/lang/builder.py", line 64, in custom_callback
     exec(__kvlang__.co_value, idmap)
   File "/home/karacb/Desktop/Python/kivy language/Informatik/findface.kv", line 63, in <module>
     on_press: root.load(filechooser.path, filechooser.selection)
   File "/home/karacb/Desktop/Python/kivy language/Informatik/indexCopy.py", line 74, in load
     self.image.source = path
 AttributeError: 'NoneType' object has no attribute 'source'

Answer 1

Answer. I just had to add ids

def load(self, path, file):
        # та самая проблемная строка
        path = os.path.join(path, file[0])
        self.ids.image.source = path
        dismiss_popup()