Update tfidf.py

tfidf.py

@@ -1,6 +1,5 @@
-```python
+
 from sklearn.feature_extraction.text import TfidfVectorizer
 tfidf = TfidfVectorizer(max_features=5000, ngram_range=(1, 2), stop_words='english')
 X_train_tfidf = tfidf.fit_transform(X_train)
 X_test_tfidf = tfidf.transform(X_test)
-```