def kendall_tau(y_true, y_pred):
    ret_score = kendalltau(y_true, y_pred)[0]
    return ret_score if not np.isnan(ret_score) else 0.0
Initialize your data structure here.
dataset/ETHPy150Open EducationalTestingService/skll/skll/metrics.py/kendall_tau--crossover with--dataset/ETHPy150Open algorhythms/LeetCode/208 Implement Trie (Prefix Tree).py/TrieNode.__init__