Lesson2-Naive Bayes.py

#!/usr/bin/python3

""" 
    This is the code to accompany the Lesson 1 (Naive Bayes) mini-project. 

    Use a Naive Bayes Classifier to identify emails by their authors
    
    authors and labels:
    Sara has label 0
    Chris has label 1
"""
    
import sys
from time import time
sys.path.append("../tools/")
from email_preprocess import preprocess
from sklearn.naive_bayes import GaussianNB
from sklearn.metrics import accuracy_score


### features_train and features_test are the features for the training
### and testing datasets, respectively
### labels_train and labels_test are the corresponding item labels
features_train, features_test, labels_train, labels_test = preprocess()


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# Enter Your Code Here
clf = GaussianNB()


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'''
You Will be Required to record time for Training and Predicting 
The Code Given on Udacity Website is in Python-2
The Following Code is Python-3 version of the same code
'''

t0 = time()
clf.fit(features_train,labels_train)
print("Training Time:", round(time()-t0, 3), "s")

t1 = time()
pred = clf.predict(features_test)
print("Predicting Time:", round(time()-t0, 3), "s")

print("Accuracy:", accuracy_score(labels_test,pred))
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