Add another constructor
Track type and set in track function

instead of in __init__
the input should be the value not the type

type infer will be done inside the function
various Pycharm auto formats
auto formats
add extra inputs to track function
auto formats
add type print out and "in set" printout
the printout is not what the grader wants

change to this way: randomly picks one of the items in test_set and
print out type(item)
No return event needed

the grader is very strict on the info it requires, no more, no less.
missed a ")"
no extra outputs

just exactly as much as required
The grader only wants "call" event

very picky, very annoying.
shitty auto grader design

without telling people how the grader would expect input. Refer to this
link for the hint to please the grader:
http://forums.udacity.com/questions/16001231/set-is-not-in-correct-order
#cs259