Query Data Dimension Must Match Training Data Dimension

I'm developing a tweet classifier. I trained a knn clasiffier with a a tfidf dataset in which each row has a length of 3.173, after training the model a load it into a file so that

Solution 1:

The solution is simple:

You need to use vect.fit_transform() with the training data. But, when using the test data, you need only to use vect.transform().