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

Gilbert Craig
Gilbert Craig
2,102 Points
Posted by Gilbert Craig
Gilbert Craig
2,102 Points

Challenge passes but doesn't work in shell

This code gets "Congrats". When I run it in the shell with ({"strings"}) i get all four courses as expected. But , if I use ({"Ruby"}) expecting 'Ruby basics' as a result I get nothings .. Is my code wrong or the challenge wrong ?

sets.py 
COURSES = {
    "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(arg):
    topic_match = []
    for keys, values in COURSES.items():
        if arg.intersection(values):
            topic_match.append(keys)
    return topic_match

1 Answer

Josh Keenan
Josh Keenan
19,529 Points
Josh Keenan
Josh Keenan
19,529 Points 
def covers(topics):
    courses = []
    for keys, values in COURSES.items():
        if topics.intersection(values):

            courses.append(keys)
    return courses

Here's my solution, you haven't accessed you argument at all, you have tried to access COURSES, change it to arg and I think you will be fine.