firstofall i am sorry for wasting your precious time my doubt is i dont understand the working of pytorch. could you please tell me what happens when i type import torch (i belive a file called torch would be acessible to use in code). if my assumption is true then what does utils.data.dataloader does . i get the point that dataloader() is a function then what are utils and data representing are these representing classes or something like that. to be precise my question is regarding structure of the command torch.utils.data.dataloader()  what are we accessing (could you please tell me like you are accessing module>>file>>class>>function) i am asking about the structure what is class here what is module here what is file here of course i can understand dataloader is function but what are data and utils. hope i made my doubt clear