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

Prisca Egbua
Prisca Egbua
1,167 Points
Posted by Prisca Egbua
Prisca Egbua
1,167 Points

I'm trying to return a list of courses whose course topics intersect with a given set of topics.

My code looks right but it's not correct, Please can someone explain what am doing wrong and what I need to correct. Thank you

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(set1):
    for course,sets in COURSES.items():
        course_list = []
        if set1.intersection(sets):
            return course_list.append(course)

1 Answer

Steven Parker
Steven Parker
229,608 Points
Steven Parker
Steven Parker
229,608 Points

You're close, but you have a few issues:

  • "course_list" should be initialized only once, before the loop
  • there should not be a "return" inside the loop
  • the new list should be returned after the loop

I'll bet you can get it now.