Python : object of type 'NoneType' has no len()

Asked Feb 26 '19 at 06:06

Active Sep 14 '22 at 16:28

Viewed 51 times

Am trying to perform Avg-Word2Vec for a text corpus. And I have created the class for it as:

class W2V:

final_vectors = [];

def __init__(self, review):
    self.review = review        

def w2v_vec(self):
    for sent in self.review: # for each review/sentence
        word_vec = np.zeros(50)
        words_count = 0; # num of words with a valid vector in the sentence/review
        for word in sent: # for each word in a review/sentence
            if word in w2v_words:
                vec = w2v_model.wv[word]
                word_vec += vec
                words_count += 1          
        if words_count != 0:
            word_vec /= words_count   

        return W2V.final_vectors.append(word_vec)

And am trying it use this as :

x_train_ = W2V(x_train_sent)

x_train_w2v = x_train_.w2v_vec()

print(len(x_train_w2v))

But upon calling the class method am ending up with error as object of None type has no len(). I do given a search and understood that the function is returning a None value. But I don't know how to modify that so that I can get a text vector output when I am calling this class method with the list of split sentences.

edited Feb 26 '19 at 06:48

Dale K

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asked Feb 26 '19 at 06:06

ranjith

There's no class for you to use `self` – bigbounty Feb 26 '19 at 06:09
`.append()` modifies a list but returns `None`. – Klaus D. Feb 26 '19 at 06:10
It's because `W2V.final_vectors.append(word_vec)` returns None. First, apply `append`, then return `W2V.final_vectors` list. – constt Feb 26 '19 at 06:11

Python : object of type 'NoneType' has no len()

0 Answers0