Documentation improvements

[Daniel (深度碎片)]

Having trouble to verify " items. create_func will default to open_image " in ImageList

I have tried to read source code of ItemList, ImageList, and their from_folder to figure out how ImageList.from_folder work.

I can use pdb to walk through the flow of codes, but I can’t find the exact step for turning image file path object into Image object, see below for comparison

So, I go to check on the docs, the second sentence makes perfect sense to explain the missing puzzle I encountered above:

Create a ItemList in path from filenames in items . create_func will default to open_image .

However, I could not locate the place where items.create_func is set to open_image, in fact the items.create_func seem not exist

So, could you show me exact where in the source code items.create_func is set to open_image?

Thanks!