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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.  # My code is working in workspace but getting error in challenge task

if you pass a set of topics then function covers return list of courses which have overlapping topics with passed parameter. it working fine but still getting error

Q: Let's write some functions to explore set math a bit more. We're going to be using this COURSES dict in all of the examples. Don't change it, though! So, first, write a function named covers that accepts a single parameter, a set of topics. Have the function return a list of courses from COURSES where the supplied set and the course's value (also a set) overlap. For example, covers({"Python"}) would return ["Python Basics"].

Ans:

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(param1): myList=[] for key, value in COURSES.items(): if (param1 & value) == param1: myList.append(key) return myList

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(param1):
myList=[]
for key,value in COURSES.items():
if (param1 & value) == param1:
myList.append(key)
return myList
```

Hello

I have to admit that this challenge has the worse error message I've seen so far. Even if the code actually works (e.g.; meet the definition of the example provided in the question texy), you will still fail the challenge.

try this code

```def covers(param1):
myList=[]
for key,value in COURSES.items():
for item in param1:
if item in param1.intersection(value):
myList.append(key)
return myList

def covers_all(param1):
myList=[]
for key,value in COURSES.items():
if param1.intersection(value) == param1:
myList.append(key)
return myList

print(covers({"Python", "Java"}))
print(covers_all({"conditions", "input"}))
```

you don't need the print statements but I included them so you can test and review. Hope this helps.