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

COURSES challenge task 1

I don't get it what it is wrong with my code (tried to code in other way without using intersection) Could you please help me with this?

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(string):
    course_list = []
    for key, value in COURSES.items():
        if string in value:
            course_list.append(key)
    return course_list

1 Answer

The challenge says: "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"]."

Your function accepts a string, not a set. How would you do it using intersection and sets?