user3760644 user3760644 - 9 days ago 5
Python Question

NLTK python error: "TypeError: 'dict_keys' object is not subscriptable"

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 part of the code:

fdist1 = FreqDist(NSmyText)
vocab=fdist1.keys()
vocab[:200]


But when I press enter after the vocab 200 line, it returns:

Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: 'dict_keys' object is not subscriptable


Any suggestions on how to fix this so it can correctly return an answer?
Any help is greatly appreciated :)
Thanks

Answer

Looks like you are using Python 3. In Python 3 dict.keys() returns an iteratable but not indexable object. The most simple (but not so efective) solution would be:

vocab = list(fdist1.keys())