Update url_main.py

Author: Kiinitix

Extract/url_main.py

@@ -7,6 +7,7 @@
 import random
 from sklearn.model_selection import train_test_split
 from sklearn.feature_extraction.text import TfidfVectorizer
+from scipy.sparse import csr_matrix
 from sklearn.linear_model import LogisticRegression
 import pickle