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

Anna Ko
Anna Ko
2,868 Points
Posted by Anna Ko
Anna Ko
2,868 Points

What is wrong with my solution, did I get the instruction wrong? Thanks for taking a look!

I get the desired outcome, but still I am getting a bummer. Why is that? Thanks!

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(checkthis):
  output = []
  for course in COURSES.keys():
    if (COURSES[course].intersection(checkthis)) == checkthis:
      output.append(course)
  return output

1 Answer

Chris Freeman
MOD
Chris Freeman
Treehouse Moderator 68,457 Points
Chris Freeman
Chris Freeman
Treehouse Moderator 68,457 Points

You are very close. This first part of the challenge is to see if the topic is in the course's list of topics. By comparing to the "sought after topic" you are asking if the course solely covers the topic. Hint: the existence of any intersection means it covers the topic.

Post back if you need more help. Good luck!!