combiner Bummer: Didn't get the expected result, while in workspace I get it.

Don't worry, you've got the right idea. It looks like it's just a really simple problem with how *args works.

*args is a really cool shorthand that lets you pass in a variable number of arguments, which is really useful when you're not sure how many you'll need. However, that means that what you're passing in with your code is a collection of arguments. Since the challenge is only giving you a single argument, this would be a collection of only 1 item. The problem is that you're then iterating over the items in args.

For example, let's assume the argument you're given is ["apple", 5.2, "dog", 8].

def combiner(*args): # combiner(["apple", 5.2, "dog", 8])
    string = ""
    sum = 0
    for item in args: # for item in [["apple", 5.2, "dog", 8]] (see that the whole collection is a single item)
        if isinstance(item, str): # a collection is not a str, this never runs
            string += item
        if isinstance(item, (int, float)): # a collection is not an int or float, still doesn't run
            sum += item
    return string+str(sum) # returns an empty str and 0

Try just passing a single argument combiner(args). This would be a quick and dirty way to fix the issue.

I'm a little bit surprised that it's coming up normally when you try it in workspaces. You're getting the expected result with that code and the given input of ["apple", 5.2, "dog", 8]?

In any case, hopefully that all makes sense, but let me know if you have any questions or still feel stuck. Good luck, and happy coding!