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 Collections (2016, retired 2019) Dictionaries Teacher Stats

Freddie Kuhle
Freddie Kuhle
8,036 Points
Posted by Freddie Kuhle
Freddie Kuhle
8,036 Points

Hi! Does anyone know why my function is returning the wrong number of keys? Thanks in advance!

Teacher Stats: Challenge Task 1 of 5

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_teachers (teacher_course):
    teacher_course = {}
    return len(teacher_course.keys())

1 Answer

Eric M
Eric M
11,545 Points
Eric M
Eric M
11,545 Points

This line:

    teacher_course = {}

Is setting teacher_course to a blank dict. You probably don't want this line at all.[