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

Posted by pet
pet
10,908 Points

In challenge Task 2:5 I'm getting "Bummer: Didn't get the right number of courses!"

Here's my code:

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(tec_dict):
    tecs = 0 
    for item in tec_dict.keys():
        tecs += 1
    return tecs

def num_courses(tec_dict):
    courses = 0
    for value in tec_dict.values():
        courses += 1
    return courses

3 Answers

Alexander Davison
Alexander Davison
65,469 Points

Every teacher has a certain number of courses. Not all of them have one course. So why are you adding 1 to courses for every value? :wink:

Try adding len(value) to courses every iteration instead.

I hope this helps! :grin:

Happy coding! :zap: ~Alex

jorgelpezguzmn
jorgelpezguzmn
6,830 Points
jorgelpezguzmn
jorgelpezguzmn
6,830 Points

I am not sure if you want to get the overall number of teachers and courses. But in that case, here is the code:

def num_teachers(tec_dict):
    return len(tec_dict.keys())

def num_courses(tec_dict):
    courses = 0
    for value in tec_dict.values():
        courses += len(value)
    return courses

I hope this helps too!

nakalkucing
nakalkucing
12,964 Points

Hey jorgelpezguzmn, I know you just wanted to help. But just so you know, Treeehouse asks that we do not simply give away the code. They request that when answering a question you use hints like Alex did above. :) Happy coding, Nakal

jorgelpezguzmn
jorgelpezguzmn
6,830 Points

I'm sorry. I did not know that. Thanks for the advice!

nakalkucing
nakalkucing
12,964 Points

No problem! :)

pet
pet
10,908 Points
pet
pet
10,908 Points

Thanks for all the help.