Natural Language Processing Text Classification

Classifying text data from a Data Source which consists of Movie Reviews. The processing of Text Data is mandatory before we start applying Machine Learning Techniques to them. We classified whether the Movie is having a positive or a negative rating by assigning them 1; if the rating is greater than 7 and 0 if the rating is less than 4. There are some unlabeled data that I did not include in my Analysis. The text_train is a list of length 25000, while I have printed the Reviews which consists of positive ratings(1).