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

Python sets challenge help!

Hello, I've been working at this problem for a while now, and I can't get it to work in treehouse! The exact same code actually does work locally, which is weird.

Here's the problem:

Let's write some functions to explore set math a bit more. We're going to be using this COURSES dict in all of the examples. Don't change it, though! So, first, write a function named covers that accepts a single parameter, a set of topics. Have the function return a list of courses from COURSES where the supplied set and the course's value (also a set) overlap. For example, covers({"Python"}) would return ["Python Basics"].

Please help! Thanks.

    "Python Basics": {"Python", "functions", "variables",
                      "booleans", "integers", "floats",
                      "arrays", "strings", "exceptions",
                      "conditions", "input", "loops"},
    "Java Basics": {"Java", "strings", "variables",
                    "input", "exceptions", "integers",
                    "booleans", "loops"},
    "PHP Basics": {"PHP", "variables", "conditions",
                   "integers", "floats", "strings",
                   "booleans", "HTML"},
    "Ruby Basics": {"Ruby", "strings", "floats",
                    "integers", "conditions",
                    "functions", "input"}

def covers(set_of_topics):
    list = []
    for course in COURSES:
        for topic in set_of_topics: 
            if topic in course:

1 Answer

Oliver Small
Oliver Small
12,578 Points

Hey, just remember this is a question about using sets, so you will want to try use them in this challenge. You will want to find the intersection of the two sets which you can do using the & symbol:

def covers(topics):
    list = []
    for course in COURSES:
        if topics & COURSES[course]:
    return list