If you are unsure of the general features of the ndcube package, your first stop should be this guide which we strive to make as comprehensive, yet understandable, as possible. If you would like to know more about how to use a specific function, class, etc., documentation for each object is stored in the source code itself. It can be accessed there or in the Reference/API of this guide. If you cannot find the answer to your issue there, would like to provide feedback, or would like help contributing code to ndcube, you can get help directly from the ndcube team in a number of ways.
SunPy Mailing Lists¶
ndcube is a SunPy-affiliated package and is developed within the larger SunPy development ecosystem. You can contact the ndcube developers by email via the SunPy mailing lists. Just reference ndcube in the email subject and it will find its way to a relevant developer.
SunPy has two mailing lists: a general mailing list; and a developer mailing list. If you have a general question about how ndcube works, use the general mailing list. The general mailing list is another way to get help with doing solar physics in Python. If, on the other hand, you have a question about the inner workings of ndcube, how ndcube is organized, or have a question about developing some new feature, please use the developer mailing list.
If you are using IRC hosted on freenode, then you can join the same channel (bridged into matrix) by joining the (#sunpy) channel on freenode.