Forcibly disable auto-completion on certain objects / attributes of object

[SylvainCorlay]

I am using a bunch type to enable auto-completion on keys of a dictionary.

I would like to remove anything that is not a key of that dictionary from the results of the auto-completion so that it is not polluted with the methods and attributes of the base dict class.

Is there a means to achieve this?

[takluyver]

If it's a class you're writing, you can override the __dir__ method which is used to find completions.

[SylvainCorlay]

Thanks! Would this have side effects?

At the moment, I am using traitlets.utils.Bunch. Dunno if it would make sense to override __dir__ on traitlets.utils.Bunch. All of this is fairly cosmetic anyway.

[takluyver]

I don't think __dir__() is important for anything else, but I'm not 100% sure of that. Possibly in this particular case, a smarter way would be to implement something similar to Bunch that doesn't inherit from dict.