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

Posted by Thor-Erik Stoevland
Thor-Erik Stoevland
9,553 Points

"Bummer! Didn't get the right number of courses!" I can't see why my code isn't accepted?

Can someone see why my code doesnt work? As far as I know this shoul've been accepted.

def num_teachers(name): teachers = {} for i in name.keys(): return len(name.keys()) break

def num_courses(name): total_list = [] for i in teachers.values(): total_list.extend(i) total = len(total_list) print(total)

teachers = {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'], 'Kenneth Love': ['Python Basics', 'Python Collections']}

num_courses(teachers)

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(name):
    teachers = {}
    for i in name.keys():
        return len(name.keys())
        break



def num_courses(name):
    total_list = []
    for i in teachers.values():
        total_list.extend(i)
    total = len(total_list)
    return total



teachers = {'Andrew Chalkley': ['jQuery Basics', 'Node.js Basics'],
          'Kenneth Love': ['Python Basics', 'Python Collections']}



num_courses(teachers)

1 Answer

Jennifer Nordell
seal-mask
STAFF
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher
Jennifer Nordell
.a{fill-rule:evenodd;}techdegree
Jennifer Nordell
Treehouse Teacher

Hi there! Your logic and syntax are spot on, but you're doing something that the challenge is not taking into account. You're creating a variable with a dictionary named teachers in the global scope and then running the function yourself. While this is great for testing, you should be aware that Treehouse will be running your code and that this global variable will not be applicable. They are going to call your function and pass in a dictionary. You've elected to name the parameter name. You are currently returning the value of the dictionary you made instead of the dictionary they are sending, and we have no idea what that dictionary looks like :smiley:

So where you wrote this:

for i in teachers.values():

You should have:

for i in name.values():

Hope this helps! :sparkles:

Thor-Erik Stoevland
Thor-Erik Stoevland
9,553 Points

Hello Jennifer!

Thank you very much. When I think about it, I'va had simillar issues before. I'll be more consistant from now on.

Yes it helped, thank you very much!