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

need help with the third part of challenge - output is blank -

is supposed to return all values from dictionary in single list - but returns nothing

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(dict):
    number = len(dict)
    return number

#counts the number of values through entire dictionary, even if there are multiple per key
def num_courses(dict):
    ctr = sum(map(len, dict.values()))
    return ctr

#function that returns a single list of all the courses
def courses(dict):
    course_list = []
    for value in dict.values():
        course_list.extend(value.split(","))
    return course_list

1 Answer

Moosa Bonomali
Moosa Bonomali
6,297 Points

When you get the value from dict.values(), the result is an array.

for value in dict.values()

value is an array. So you only need to extend course_list with this array like so;

course_list.extend(value)