I think it was a little confusing that sometimes the reading methods returned a list of densities or the proper sized numpy.array for the densities (as an example). For this reason I think is more convenient to return the list of densities from all groups only if specified.
Another option is to forget about the groups and just use mode='w' and not allow to append (mode='a') when writing variables in a file.
I also changed that U is saved as its original type (float or array). Previously it was always saved as an array.
I think it was a little confusing that sometimes the reading methods returned a list of densities or the proper sized
numpy.arrayfor the densities (as an example). For this reason I think is more convenient to return the list of densities from all groups only if specified.Another option is to forget about the groups and just use mode='w' and not allow to append (mode='a') when writing variables in a file.
I also changed that
Uis saved as its originaltype(float or array). Previously it was always saved as an array.