列表索引超出范围（python jupyter）

Question

import pandas as pd
films = { 'title': titles, 'rank': ranks, 'synopsis': synopses, 'cluster': clusters, 'genre': genres }

#frame = pd.DataFrame(films[frame] for frame in films.keys())
frame = pd.DataFrame(films,columns = ['rank', 'title', 'cluster', 'genre'])
dups_shape = frame.pivot_table(index=['cluster'], aggfunc='size')
print (dups_shape)

items = { 'title': titles, 'Synopses': synopses}

frame = pd.DataFrame(items, index = [clusters] , columns = [ 'title','cluster'])


print("Top terms per cluster:")

# sort cluster centers by proximity to centroid
order_centroids = km.cluster_centers_.argsort()[:, ::-1]

for i in range(num_clusters):
    print("Cluster %d words:" % i, end='')

    for ind in order_centroids[i, :6]:  # replace 6 with n words per cluster
        print(' %s' % vocab_frame.loc[terms[ind].split(' ')].values.tolist()[0][0], end=',')


    print()

我不知道如何解决这个问题。因为我复制了这个代码并根据我的项目进行了调整。你知道吗

编辑：评论中OP提供的完整回溯

    Top terms per cluster:
    Cluster 0 words:
    ---------------------------------------------------------------------------
    IndexError Traceback (most recent call last) <ipython-input-40-2088a7881446> in <module>
    13
    14 for ind in order_centroids[i, :6]: # replace 6 with n words per cluster 
--->15 print(' %s' % vocab_frame.loc[terms[ind].split(' ')].values.tolist()[0][0], end=',')
    16
    17 IndexError: list index out of range