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 Python Basics (2015) Logic in Python Try and Except

Posted by Sim Ar
Sim Ar
482 Points

I am stuck can't solve

Bummer! TypeError: catching classes that do not inherit from BaseException is not allowed when i check my thhis error popped out !!!

trial.py 
def add(apple,samsung):
    try:
        return float(apple) + float(samsung)
    except ValueError():
        return None
    else:
        print(apple + samsung)
Eric Harris
Eric Harris
2,391 Points
Eric Harris
Eric Harris
2,391 Points

I would try this:

Code Snippet Delete By Treehouse Community Moderator. "Giving" away answers without explanations as to why it is the correct answer and/or what was done incorrectly is strongly frowned upon in the Community.

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,454 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,454 Points

You are very close!

  • ValueError is used without the parens. With the parens it is a call to create a instant of the class ValueError, which, in this context, it fails the type expected in the except statement.
  • The final else should use a return instead a print.

Post back if you need more help. Good luck!!!