RuntimeError: dictionary changed size during iteration

[Shreeniket987]

So basically what I want is python code that counts how many times a word occurs in a paragraph for text auto summarization. I have managed to spit up the paragraph into sentences and sentences into words... So its a list of lists. And I am using the 'defaultdict" from the 'collections' library.
Here is my code:

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from collections import defaultdict freq = defaultdict(int) for sentence in word_sent: #word_sent is my list of lists that I mentioned above.     for word in sentence:         freq[word] += 1

I even tried like this:(Without using defaultdict)

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freq = {} for sentence in word_sent: #word_sent is my list of lists that I mentioned above.     for word in sentence:         if word not in freq.keys():             freq[word] = 1         else:             freq[word] += 1

Yet I am getting the same error:

Error:
RuntimeError: dictionary changed size during iteration

And this is the only dictionary I have in my entire code.
Someone please help... Thank you!
P.S. This is my first post so please tell me if it is comprehensible or not.

[Yoriz]

I am not getting the error that you did, you didn't give a sample of word_sent so i made my own.

You should give a proper sample of word_sent so it can be tested in the same condition.

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from collections import defaultdict   word_sent = [     ["word", "word2", "word3", "word"],     ["word5", "word1", "word1", "word"],     ["word5", "word2", "word2", "word"], ]   freq = defaultdict(int) for sentence in word_sent:  # word_sent is my list of lists that I mentioned above.     for word in sentence:         freq[word] += 1   print(freq)

Output:
defaultdict(<class 'int'>, {'word': 4, 'word2': 3, 'word3': 1, 'word5': 2, 'word1': 2})

[snippsat]

I also don't get error from your first code,can also use Counter from collection which as the name hint is made for counting stuff.
Has also useful method as most_common().
Test using word_sent that @Yoriz made.

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>>> from collections import Counter >>> >>> c = Counter(x for xs in word_sent for x in xs) >>> c Counter({'word': 4, 'word2': 3, 'word5': 2, 'word1': 2, 'word3': 1}) >>> c.most_common(2) [('word', 4), ('word2', 3)] >>> c.most_common(1) [('word', 4)]

[buran]

it would be helpful to show the full traceback you get (in error tags)