class BSVar:

    def __init__(self, name, cache):
        self.name = name
        self.cache = cache

    def get(self):
        try:
            return self.cache.data[self.name]
        except KeyError as e:
            print("KeyError:", e) #TODO: remove / KeyError should be impossible to trigger
            return None

    value = property(get)

    def __repr__(self):
        return f"{self.name} = {self.value}"