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

My code works in the terminal but not in Treehouse.

I know this code works, but treehouse says it doesn't get the right output. How should I write my code to pass this 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(single_parameter):
    empty_list = []
    for keys, values in COURSES.items():
        if single_parameter.issubset(values):
            empty_list.append(keys)
    return empty_list

1 Answer

just use .intersection()