features = None
size = 5
typ = 'd'  
features =  {"compression" : True, "shuffle": True}

#features =  {"layout" : "chunked", "chunk_size":[1, 500, 1000]}


create_dataset("group/contiguous", typ, False, (size, 1000, 1000), features)
create_dataset("group/chunked", typ, False, (0, 1000, 1000), features)




for i in range(size): 
    data = [ [int(i)] * 1000, ] * 1000
    #data = Convert.flatten(to_array(data, typ))
    append_dataset("group/chunked", data )
    append_dataset("group/contiguous", data)