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Python Python Collections (2016, retired 2019) Sets Set Math

Posted by john larson
john larson
16,594 Points

return a list of courses from COURSES where the supplied set and the course's value (also a set) overlap.

I've tested this several different ways and it seems to work, but it fails the challenge. Not looking for a solution, just a clue as to what I am missing.

def covers(topics): # topics = type set

    list_of_courses = [] # the key for topics that overlap
    # compare topics w/ dct value
    # if topics and value overlap
    # append key to list_of_courses
    for key, value in COURSES.items():
        if value.intersection(set_of_topics):
            list_of_courses.append(key)
    return list_of_courses
john larson
john larson
16,594 Points

Thanks you Jason, I appreciate your help.

1 Answer

Jason Anello
PLUS
Jason Anello
Courses Plus Student 94,610 Points
Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

Hi John,

It's hard to give a hint on this without giving away the solution because you're so close.

Take a look at the names of your variables. topics is the parameter to your function. Where are you using that in your code?

john larson
john larson
16,594 Points

Thanks Jason. I fixed that, now I have:

def covers(topics): # topics = type set
    list_of_courses = [] # the key for topics that overlap
    # compare topics w/ dct value
    # if topics and value overlap
    # append key to list_of_courses
    for key, value in COURSES.items():
        if value.intersection(topics):
            list_of_courses.append(key)

But it's still not passing. Any other clues?

Jason Anello
Jason Anello
Courses Plus Student 94,610 Points

You're missing the return statement that you had originally.

This new code passes once I add that in.