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

Hasan Ahmad
Hasan Ahmad
6,727 Points
Posted by Hasan Ahmad
Hasan Ahmad
6,727 Points

Python math sets; Task 1 is no longer passing

I have hit another brick wall I guess... I have got this answer from another student but never really understood the concepts behind the code. One of the answers said that to use issuperset() method instead of intersection() method. I did as the answer said but now all it says is that task 1 is no longer passing!

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.union(values):
            empty_list.append(keys)
    return empty_list

def covers_all(single_parameter):
    new_empty_list = []
    for keys, values in COURSES.items():
        if single_parameter.issuperset(values):
            new_empty_list.append(keys)
    return new_empty_list

2 Answers

Christopher Shaw
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PLUS
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Christopher Shaw
Python Web Development Techdegree Graduate 58,248 Points
Christopher Shaw
.a{fill-rule:evenodd;}techdegree seal-36
Christopher Shaw
Python Web Development Techdegree Graduate 58,248 Points

For Task 1 to pass, for the intersection of the two sets should be if single_parameter.intersection(values): not union that you have.

You will still need to work on your function covers_all

Hasan Ahmad
Hasan Ahmad
6,727 Points
Hasan Ahmad
Hasan Ahmad
6,727 Points

Now it says that it didn't get the right output from covers_all

Michael Neimat
Michael Neimat
2,680 Points
Michael Neimat
Michael Neimat
2,680 Points

try using difference instead of issuperset and look for an empty set as your result