load_model not working for models with Vector-type "totaldegree"

[wgst]

Hi,

I'm unable to load a model (through load_model) that has assigned a vector-type "totaldegree" (different degrees for each order). It looks like this is caused by _sanitize_dict changing the vector into a tuple, which leads to an error in _get_degrees :

error("Cannot determine total degree of ACE basis from the arguments provided.")