NLTK python error: “TypeError: 'dict_keys' object is not subscriptable”

Question

I am following instructions for a class homework assignment and I am supposed to look up the top 200 most frequently used words in a text file.

Here\'s the last par

Answer 1

I am using python 3.5 and I meet the same problem of TypeError.

Using vocab = list(fdist1.keys()) does not give me the top 50 most frequently used words.
But fdist1.most_common(50) does.

Further,if you just want to show those top 50 words not with their frequency,you can try :

[word for (word, freq) in fdist1.most_common(50)]