How to iterate through set parameter?

Question

Hello everyone, I am up to the first challenge with set math and I have gotten as far returning the proper course, BUT only if the set parameter is one value long. when I try to add another it just returns None. I have been stuck for a good minute, any help is greatly appreciated.

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(set):
    for course, topic in COURSES.items():
        for all(x) in set:
            if set.issubset(topic):
                return course

Answer 1 · 2018-12-17T15:34:58Z

December 17, 2018 3:34pm

It looks like you have a grasp of the concepts of what is to be done. A couple of small tweaks to your code:

create an empty list of courses you want to return to the user
the inner loop is just "x in set" a little simpler than what you had--

this allows us to go through each item in the set.

check if x is in the topics for the current course

if it is, append the current course to our courses list.

finally, return the courses we collected.

def covers(set):
    courses = [] # list of courses to return
    # the next block goes through all the courses and topics.
    for course, topics in COURSES.items():
        # the next block looks to see if each of the x in the set are in the topics
        for x in set:
            # on the next line, check if x is included in the topics
            if x in topics:
                courses.append(course) # add the course to our courses list
    return courses # finally, return the courses to the calling function.

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Sandy Leon

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How to iterate through set parameter?

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Jeff Muday

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Sandy Leon

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