Update app.py

app.py

@@ -1,16 +1,22 @@
 # Import necessary libraries
 import streamlit as st
-import re
+
+# scikit learn : https://scikit-learn.org/stable/
+from sklearn.feature_extraction.text import TfidfVectorizer
+from sklearn.cluster import KMeans
+from sklearn.metrics.pairwise import linear_kernel
+
+# nltk https://www.nltk.org/
 import nltk
-import os
 from nltk.corpus import stopwords
 from nltk import FreqDist
+
+import re
+import os
+import base64
+
 from graphviz import Digraph
-from sklearn.feature_extraction.text import TfidfVectorizer
-from sklearn.cluster import KMeans
-from sklearn.metrics.pairwise import linear_kernel
 from io import BytesIO
-import base64
 
 # Set page configuration with a title and favicon
 st.set_page_config(