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Does it support reactive data binding? Like: https://github.com/Bomberus/LayoutX

No, you have to manually update widgets assigning them their new value (strings, and for labels also lists and dicts). I will think about such a feature but I have no experience with such dynamic frameworks :)

Shouldn't be too hard. For example you could use: https://github.com/ReactiveX/RxPY.

Then your central state is assigned to a Subject and all widgets have an reference to an observer. As soon as the central state value changes, the callback in the observer is triggered and you can fire the update method for the widget using the central state value.

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