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

Posted by Dlniya Dlzar
Dlniya Dlzar
2,033 Points

I can run this in my computer without problem but why here it is says Didn't get the right output

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(item):

  course = []
  for value in COURSES:
        if not item - COURSES[value]  :
              course += {value}           
  return course

print(covers({"Python"}))

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(item):

      course = []
      for value in COURSES:
            if not item - COURSES[value]  :
                  course += {value}           
      return course


print(covers({"Python"}))
Ismail KOÇ
Ismail KOÇ
1,748 Points
Ismail KOÇ
Ismail KOÇ
1,748 Points

Be careful for spaces (before statement, you can add tab (one tab, two tab, three tab, ...)) and (before write : (do not add space))

1 Answer

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

You are very close. The challenge wording can be interpreted more strictly than necessary. The challenge is looking for simple overlap and is not look to see if the supplied set is a proper subset of a courses topics. Using an intersection() or & instead of subtraction will pass Task 1.

Post back if you have more questions. Good luck!!