Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

Python

Mohamad Bouzi
Mohamad Bouzi
2,939 Points
Posted by Mohamad Bouzi
Mohamad Bouzi
2,939 Points

Why it is a Bummer ?

I don't know what is wrong here?

instances.py 
def combiner(*args):
    string = ""
    sum = 0
    for item in args:
        if isinstance(item, str):
            string += item
        else isinstance(item, (int, float)):
            sum += item
    return string + str(sum)

1 Answer

Steven Parker
Steven Parker
231,236 Points
Steven Parker
Steven Parker
231,236 Points

The instructions say: "Create a function named combiner that takes a single argument, which will be a list made up of strings and numbers."

I see two issues:

  • the unpacking ("splat") operator is used when you have multiple arguments, not one that is already a list
  • a plain "else" doesn't take a conditional expression