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

Posted by Kohei Ashida
Kohei Ashida
4,882 Points

I cannot solve the code challenge: instances in python OOP

I stuck on instances coding challenge... Could someone give me the way how to solve this?

def combiner(*args):
    words = ""
    nums = 0
    for item in args:
        if isinstance(item, str):
            words += item
        elif isinstance(item, (int, float)):
            nums += item
    return words + str(nums)

1 Answer

Scott Bailey
Scott Bailey
13,190 Points

Your code will pass (if it's the challenge I think it it) if you just change the opening.

def combiner(args):

The challenge is only passing you a single arguement of a list, so you only need to take in one arguement, that you can iterate through.

Full code

def combiner(args):
    words = ""
    nums = 0
    for item in args:
        if isinstance(item, str):
            words += item
        elif isinstance(item, (int, float)):
            nums += item
    return words + str(nums)

Just playing around - if you wanted to keep *args - the code will work if you slightly change the for loop:

def combiner(*args):
    words = ""
    nums = 0
    for arg in args[0]:
        if isinstance(arg, str):
            words += arg
        elif isinstance(arg, (int, float)):
            nums += arg
    return words + str(nums)

It's different to how I would have done it (slightly) but it does the job! Good work!

Kohei Ashida
Kohei Ashida
4,882 Points

Thanks a lot! It worked out!