import nltk
import numpy as np
import scipy as sc
import matplotlib.pyplot as plt
from nltk.corpus import stopwords
from nltk.corpus import movie_reviews
from nltk.tokenize import word_tokenize,sent_tokenize
from sklearn.svm import SVC , LinearSVC , NuSVC
from sklearn.naive_bayes import MultinomialNB,BernoulliNB
from sklearn.linear_model import LogisticRegression,SGDClassifier