Update app.py

app.py

@@ -3,6 +3,7 @@ from nltk.tokenize import word_tokenize, sent_tokenize
 from urllib.request import urlopen
 from bs4 import BeautifulSoup
 import nltk
+import socket
 from difflib import SequenceMatcher
 from sklearn.feature_extraction.text import TfidfVectorizer
 from sklearn.cluster import KMeans