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

Gali B
Gali B
2,082 Points
Posted by Gali B
Gali B
2,082 Points

The code works on IDE but not on Treehouse RIPL

Hey, I'm using JetBrains PyCharm as my IDE. I wrote the following code:

def covers(param):
    lst = []
    set1 = {param}

    for key, value in COURSES.items():
        if set1.intersection(value):
            lst.append(key)


    return lst

When calling the function by: print(covers("Python"))

I get the following output: ['Python Basics']

Which by the example given by Treehouse for this exercise, I've done it as required. If so, why when checking the code I being told to "try again?"

*And yes, I've tried to refresh my browser and paste the code again.

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(parm):
    lst = []
    set1 = {parm}
    for key, value in COURSES.items():
        if set1.intersection(value):
            lst.append(key)


    return lst
Gali B
Gali B
2,082 Points
Gali B
Gali B
2,082 Points

Don't really know why, but the '''set1 = {parm}''' was the problem.. now I wrote:

def covers(param): lst = []

for key, value in COURSES.items():
    if param.intersection(value):
        lst.append(key)

return lst

and it works.

1 Answer

Alexander Davison
Alexander Davison
65,469 Points
Alexander Davison
Alexander Davison
65,469 Points

Remove set1 and replace the if statement's condition with:

param.intersection(value)