Box is a subclass of dict and as such certain keys cannot be accessed via dot notation (aka as methods). This is because names such as keys and pop have already been declared as methods, so Box cannot use it's special sauce to overwrite them.

However it is still possible to have items with those names in the Box and access them like a normal dictionary, such as my_box['keys'].

This is as designed, and will not be changed.

These protected keys include : clear, copy, fromkeys, get, items, keys, pop, popitem, setdefault, to_dict, update, merge_update, values and all the transform methods.

To view an entire list of what cannot be accessed via dot notation, view dir(Box()).