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john larson
16,594 PointsMissing something about how sets work: print(fib.issubset(prime))
fib = {1,2,3,5,8,13,21,34,55,89,174}
prime = {1,2,3,5,7,9,13,17,19,22,29}
# from the python documentation
# ................................................................
#issubset(other)
#set <= other
#Test whether every element in the set is in other.
print(fib.issubset(prime))
#8 in fib, not in prime
#21 in fib, not in prime
#34, 55, 89, 174 in fib, not in prime
# yet, when I run it, returns True
The documentation seems straightforward, but clearly I am missing something.
2 Answers
Steven Parker
231,236 PointsWhen I run it, I get False.
I tried it in the Treehouse workspace REPL, and also in my locally-installed Python (version 3.2.5).
Where are you trying it?
Chris Komaroff
Courses Plus Student 14,198 PointsThanks for heads up on .issubset(). Maybe a simpler example:
>>> a_set = {1,2,3,4,5}
>>> b_set = {3,4}
>>> a_set.issubset(b_set)
False
>>> b_set.issubset(a_set)
True
>>>
john larson
16,594 Pointsjohn larson
16,594 PointsHi Steve, I ran it local, copy and pasted, I'll look at it again. I know it should return false like you got... That time I got False. I swear I ran it 3 or 4 times looking at it each time, cause I was going to use it in some code, and it wasn't doing what I expected. Well thanks for looking.