Issue
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?
Solution
Looks like you are using Python 3. In Python 3 dict.keys()
returns an iterable but not indexable object. The most simple (but not so efficient) solution would be:
vocab = list(fdist1.keys())[:200]
In some situations it is desirable to continue working with an iterator object instead of a list. This can be done with itertools.islice()
:
import itertools
vocal_iterator = itertools.islice(fdist1.keys(), 200)
Answered By - Klaus D.
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