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 Mathew Yangang
Mathew Yangang
4,433 Points

isinstance

I think I am missing something here, but not sure exactly what is the error

instances.py 
def combiner(lst):
    x = ""
    j=0
    for i in range(len(lst)):
        if i  isinstance(i,str) and isinstance(j,(float,int):
            x.append(i)
            j+=j
       return x + int(j)

1 Answer

kyle kitlinski
kyle kitlinski
5,619 Points
kyle kitlinski
kyle kitlinski
5,619 Points

Looks like you just need to remove the first i after the if statement like this. Also i believe i is going to be a number in range every time so you'll want to replace the i in the loop as lst[i]

if isinstance(lst[i],str) and isinstance(j,(float,int):
    x.append(lst[i])
Mathew Yangang
Mathew Yangang
4,433 Points

Thank you Kyle