Create vocabulary dictionary for text mining

Question

I have the following code:

train_set = ("The sky is blue.", "The sun is bright.")
test_set = ("The sun in the sky is bright.",
    "We can see the shining sun, the bright sun.")

Now Im trying to calculate the word frequency like this:

    from sklearn.feature_extraction.text import CountVectorizer
    vectorizer = CountVectorizer()

Next I would like to print the voculabary. Therefore I do:

vectorizer.fit_transform(train_set)
print vectorizer.vocabulary

Right now I get the ouput none. While I expect something like:

{'blue': 0, 'sun': 1, 'bright': 2, 'sky': 3}

Any thoughts where this goes wrong?

Answer 1

I think you can try this:

print vectorizer.vocabulary_