Welcome to the Treehouse Community

Want to collaborate on code errors? Have bugs you need feedback on? Looking for an extra set of eyes on your latest project? Get support with fellow developers, designers, and programmers of all backgrounds and skill levels here with the Treehouse Community! While you're at it, check out some resources Treehouse students have shared here.

Looking to learn something new?

Treehouse offers a seven day free trial for new students. Get access to thousands of hours of content and join thousands of Treehouse students and alumni in the community today.

Start your free trial

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

Posted by ekjot singh
ekjot singh
1,542 Points

why my code is not executing?

please help! it is showing 'Bummer! Couldn,t find "covers" '.

sets.py 
def covers(single_set):
    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"}
              }
    my_list=[]
    for key, value in COURSES.items():
        if set(single_set).issubset(value) :
            my_list.append(key)
    return my_list

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,441 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,441 Points

This challenge is looking for the less precise simple overlap and not a proper subset comparison. Using intersection instead of issubset