5. spam.py

from spam_data import training_spam_docs, training_doc_tokens, training_labels, test_labels, test_spam_docs, training_docs, test_docs
from sklearn.naive_bayes import MultinomialNB
# Import CountVectorizer from sklearn:
from sklearn.feature_extraction.text import CountVectorizer

# Define bow_vectorizer:
bow_vectorizer = CountVectorizer()

# Define training_vectors:
training_vectors = bow_vectorizer.fit_transform(training_docs)
# Define test_vectors:
test_vectors = bow_vectorizer.transform(test_docs)

spam_classifier = MultinomialNB()

def spam_or_not(label):
  return "spam" if label else "not spam"

# Uncomment the code below when you're done:
spam_classifier.fit(training_vectors, training_labels)

predictions = spam_classifier.score(test_vectors, test_labels)

print("The predictions for the test data were {0}% accurate.\n\nFor example, '{1}' was classified as {2}.\n\nMeanwhile, '{3}' was classified as {4}.".format(predictions * 100, test_docs[7], spam_or_not(test_labels[7]), test_docs[15], spam_or_not(test_labels[15])))