Section 6 lesson 150 AttributeError on next() call

[AxisMeetsWorld]

Hi @mrdbourke,
Ok this one really has me puzzled. I am not getting a very clear error message, and the only one that I tried exploring was changing the number of data loaders. I am taking a screeen shot so I can show you where in the lecture things are off, but I ran all of the other code in google Colab from top to bottom without error, but this next(iter(train_dataloader_custom)) command and the only error message on the traceback that seems to be clearing anything up is at the very bottom I am getting AttributeError: module 'PIL.Image' has no attribute 'Open'. Here is a screenshot of where things seem to be going haywire:

Was this in one of the function definitions?

[AxisMeetsWorld]

Hi @mrdbourke,
I think I fixed the problem, but I do have a question for you. I guess I should have picked up on that "Open" key word which was in that custom class we defined: class ImageFolderCustom(Dataset):. In that, what was happening, was I accidentally capitalized "open" and when I ran a search for "Open" I found it, so that was my issue!
However, the only thing that was sort of odd about it, was I reran that cell with the class definition, and when I did, and went back to the problem cell at the bottom, I still couldn't get things to run without that error. I had to run all of the code again, before I was able to get that last cell to work. Any idea of why that was? Is there some sort of other command that had to be run and populate first before the class could be re-defined? Thanks for all of your help, and for a very thorough course!