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

Great work! OK, let's create something a bit more refined. Create a new function named covers_all that takes a single s

i need help on this one, i am not progressive although i feel good about it

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):
    list_of_courses= []
    for key, value in COURSES.items():
        if value & arg:
            list_of_courses.append(key)
    return list_of_courses

def covers_all(arg):
    list_of_all_courses = []
    for course in COURSES.items():
        if arg & COURSES [course] == arg:
            list_of_all_courses.append(course)
    return list_of_all_courses