regarding the parameters in os.path.join
Question: I am trying to reproduce a python program, which includes the following line
of code

    
    
    data = glob(os.path.join("./data", config.dataset, "*.jpg"))
    

My guess is that it will capture all `.jpg` files stored in `/data` folder.
But I am not sure the usage of `config.dataset` here? Should the folder
structure look like `/data/config.dataset/*.jpg` The reason I need to
understand this is because I need to create a data input folder to run the
program. The original program does not share the detail on the data
organization.


Answer: `config.dataset` in your code fragment is a variable. It's either a `dataset`
attribute of some `config` object, or the `dataset` global variable in an
imported `config` module (from this code's perspective they work the same).

As a few people have commented, for that code to work, `config.dataset` must
evaluate to a string, probably a single directory name. So the result of the
`join` call will be something like `"./data/images/*.jpg"` (if
`config.dataset` is `"images"`). The variable could also have a (pre-joined)
path section including one or more slashes. For instance, if `config.dataset`
was `"path/to/the/images"`, you'd end up with
`"./data/path/to/the/images/*.jpg"`.

