[yt-dev] Need help to create new frontend

Hi developers, I make an internship at a German reasearcher institute. My job is to write a frontend for yt to load a special kind of HDF5 files. Most parts of the code are are working now. So the yt.load() function create a dataset without throwing errors. But I have still some erros when I wand to make a plot. The reason is I have problems with the code in the io.py. Can you please help me with further explanation of the class in io.py. Thank you for helping. Daniel Grassinger