Update search_engine.py

Author: Shmelevick

search_engine/search_engine.py

@@ -6,7 +6,7 @@
 
 
 def preprocess(text):
-    return re.sub(r'[^\w\s]', '', text).lower()
+    return re.sub(r'[^\w\s]|(?<!\w)_', '', text).lower()
 
 
 def search(docs: list, words: str) -> list:
@@ -110,4 +110,4 @@ def get_tf_idf(docs):
 #     {'id': 'doc3', 'text': doc3},
 # ]
 
-# pprint(get_tf_idf(docs))
+# pprint(get_tf_idf(docs))