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

Confused with this set Challenge

Having a hard time understanding how to get the result for Question 1 in the Challenge.

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(topics):
    Clist = []
    for course in COURSES.keys():
        Clist.append(course)
        Clist = list(set(Clist))
        Clist.intersection(course)
    return Clist

1 Answer

Steven Parker
Steven Parker
230,995 Points

You won't need to "append" anything in this challenge. The methods you create only test the set contents, they won't be changing them.