how change kivy's widget's settings using python script?

Question

how could i change settings of a widget declared in a kivy file using its own python class? example:

kv file:

<Button>:
Button:
    name:'btn'
    text:'yes'
    on_press:doet()

py file:

class Button(self):
    def doet():
        btn.text='nope'

Answer 1

You can solve this by setting an ID to the button. All you got to do is add id: "btn" to your .kv file and you could access this through self.ids.btn.text in your .py file. So it must look like this:

.kv

<Button>
    Button:
        id:'btn'
        text:'yes'
        on_press: root.doet()

.py

class Button:
    def doet(self):
        self.ids.btn.text='nope'