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

angel moreta
angel moreta
2,912 Points
Posted by angel moreta
angel moreta
2,912 Points

I don't know what I'm doing here and the challenge is kinda confusing, please i need a hint and clear explanations

challenge : Let's write some functions to explore set math a bit more.We're going to be using this COURSES dict in all of the examples.Don't change it, though! So, first, 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"].

I need a hint no answers i didnt think this challenge was going to take me so much time.

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):
    set_of_topics= set() #Empty set() #my set of topics
    list_of_courses= set()#Empty set().
    for each_course,each_topic in topics.items():
        list_of_courses.update({each_course}) #str to set
        set_of_topics.update(each_topic)
    return list_of_courses, set_of_topics

1 Answer

Bryan Park
Bryan Park
13,481 Points
Bryan Park
Bryan Park
13,481 Points

Sometime giving hints is harder than providing the answer. Hopefully the hint won't be to much.

You don't need two sets. One line of courseList = [] should be good. Your key and value are backwards in your for statement, and those are being ran against COURSES (not topics). Inside the for statement you can have a if statement to compare to see if the value matches the topic. If it does then append the courseList with the key. Then return the courseList.