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

Lukas Straumann
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.a{fill-rule:evenodd;}techdegree
Lukas Straumann
Python Web Development Techdegree Student 9,588 Points
Posted by Lukas Straumann
.a{fill-rule:evenodd;}techdegree
Lukas Straumann
Python Web Development Techdegree Student 9,588 Points

I don't understand why my code doesn't not answer the code challenges' question. I guess I need help here.

I don't understand why my code doesn't not answer the code challenges' question. I guess I need help here.

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(para):
    coursesList = []
    for course in COURSES:
        if para.issubset(COURSES[course]):# x.issubset(y) returns True, if x is a subset of y.
            coursesList.append(course)
    return coursesList

2 Answers

Wade Williams
Wade Williams
24,476 Points
Wade Williams
Wade Williams
24,476 Points

You're pretty close, but you need to loop through COURSES for each topic. Your code works if "para" only has 1 item in it, but fails if it has more than 1 item in it.

Here's my code

def covers(topics):

    results = []

    for topic in topics:
        for course in COURSES:

            if topic in COURSES[course]:
                results.append(course)

    return results