Welcome to the Treehouse Community

The Treehouse Community is a meeting place for developers, designers, and programmers of all backgrounds and skill levels to get support. Collaborate here on code errors or bugs that you need feedback on, or asking for an extra set of eyes on your latest project. Join thousands of Treehouse students and alumni in the community today. (Note: Only Treehouse students can comment or ask questions, but non-students are welcome to browse our conversations.)

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and a supportive community. Start your free trial today.

Python Python Collections (2016, retired 2019) Dictionaries Teacher Stats

Posted by Eldor Ibragimov
Eldor Ibragimov
1,733 Points

Teachers.py problem

I dont knw whats problem with my code. It is counting number of courses then gives total number of them as a result. Can you help me with it?

teachers.py 
# The dictionary will look something like:
# {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
#  'Kenneth Love': ['Python Basics', 'Python Collections']}
#
# Each key will be a Teacher and the value will be a list of courses.
#
# Your code goes below here.

def num_courses(dictionary):
    count = 0
    for key in dictionary.values():
        for item in key:
            count+= 1
    return count
Eldor Ibragimov
Eldor Ibragimov
1,733 Points

Yes, I did

1 Answer

Steven Parker
Steven Parker
220,450 Points
Steven Parker
Steven Parker
220,450 Points

In multi-task challenges, each task builds on the previous one(s). So the num_teachers function you created for task 1 should remain as-is when you add the num_courses function. But in the code above it seems to be missing.

Did you get a message like "Oops! It looks like Task 1 is no longer passing."? The task 2 code is fine, put it with the task 1 code and you should pass to the next level.