Ch2 - kNN.py - TypeError: unhashable type: 'list'

[elliottjscott-uk]

I'm getting an error with the classify0() function in the kNN.py module.

  9     for i in range(k):
 10         voteIlabel = labels[sortedDistIndicies[i]]

---> 11 classCount[voteIlabel] = classCount.get(voteIlabel, 0) + 1
12 sortedClassCount = sorted(classCount.items(), key=operator.itemgetter(1), reverse=True)
13 return sortedClassCount[0][0]

TypeError: unhashable type: 'list'

I've taken the code from the pbharrin/machinelearninginaction3x github repo so it shouldn't be down to typos. I've run the code line by line outside of the function and I get the same error at the same point when I try to run the for loop. I'm not an experienced Python coder so it's a bit beyond me to try and solve this myself. I'm loving the book so far though.

[pbharrin]

Can you please check the type of voteIlabel? It should not be a list.
You can check the type by adding print(type(voteIlabel)) after line 10 inside the for loop.
There may be some conversion that was done automatically in Python 2 but not Python 3.

[elliottjscott-uk]

Thanks for getting back to me so quickly.
Adding the print statement you provided gives: <class 'list'>