Python Traceback error, from Ipython code. Basically I attempted to replicate by writing myself the Sean J.Taylor code.

gistfile1.pytb

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-34-180a07193cfb> in <module>()
     21     for eval_name, evaluation in evaluations.iteritems():
     22         for year in range(2002, 2013):
---> 23             metric = evaluation(ranker, year)
     24             results.append({
     25                 'rank': name,

<ipython-input-34-180a07193cfb> in <lambda>(rank, year)
     14     'predict_postseason': eval_postseason_prediction,
     15     'espn_similarity8': lambda rank, year: eval_espn_similarity(rank, year, 8),
---> 16     'espn_similarity17': lambda rank, year: eval_espn_similarity(rank, year, 17)
     17     }
     18 

<ipython-input-28-427ec555c118> in eval_espn_similarity(rank_func, year, week)
     16     week8 = games[(games['SEAS'] == year)*(games['WEEK'] <= week)]
     17     ours = rank_to_vector(rank_func(week8))
---> 18     theirs = rank_to_vector(espn_rankings[str(year)][str(week+1)])
     19 
     20     return sps.kendalltau(ours, theirs)[0]

TypeError: 'NoneType' object has no attribute '__getitem__'