How to display name of elements in list?

[cz]

> The list above is not a valid Python list. What is it that you store in that list?
>
> Or is it maybe a dictionary?
>
> Stefan

Thanks for your help. How can I find out about what this is? As I said
it's generated by a insufficiently documented module. So if this is a
user defined datatype, is there still a possibility to find the name of
the data fields storing the xx, xy, ... ?
Thanks.