Closing db connections

databaseconnect.py

@@ -53,7 +53,7 @@ def setup_database() -> object:
     Setup database with chat table, question table, statement table and directions table
 
     Returns:
-        Database object
+        None
     """
     db = connection_to_database()
     cursor = db.cursor()
@@ -72,7 +72,8 @@ def setup_database() -> object:
     cursor.execute(
       "CREATE TABLE IF NOT EXISTS {TABLES[3]}(id INTEGER PRIMARY KEY AUTO_INCREMENT, origin_location VARCHAR(100), destination_location VARCHAR(100))"  # noqa: E501
     ) 
-    return db
+    cursor.close()
+    db.close()
 
 
 @logger_config.logger
@@ -88,7 +89,7 @@ def add_to_database(classification: str, subject: str, root: str, verb: str, sen
         verb (str): Verb relation of sentence from user input.
 
     Returns:
-        db (object): Database object after adding data
+        None
 
     """
     db = connection_to_database()
@@ -132,18 +133,20 @@ def add_to_database(classification: str, subject: str, root: str, verb: str, sen
             params = (str(subject), str(root), str(verb), sentence,)
             cursor.execute(query, params)   
             db.commit()
-    return db
+    cursor.close()
+    db.close()
 
 
 @logger_config.logger
 # get a random chat response
 def get_chat_response() -> str:
     """
     Gets a random chat response from the chat table.
+
     Returns:
         response(str): A chat response from the chat table.
     """
-    
+
     db = connection_to_database()
     cursor = db.cursor(prepared=True)
     cursor.execute("SELECT COUNT(*) FROM chat_table")
@@ -156,6 +159,8 @@ def get_chat_response() -> str:
     cursor.execute(query, params)
     result = cursor.fetchone()
     response = result[0]
+    cursor.close()
+    db.close()
     return response
 
 
@@ -256,6 +261,8 @@ def learn_question_response(sentence: str) -> tuple[str, str]:
     params = (sentence, str(last_id),)
     cursor.execute(query, params)
     db.commit()
+    cursor.close()
+    db.close()
     response = "Thank you! I have learnt this."
     return response, chatbot.LearnResponse.MESSAGE.name
 
@@ -299,7 +306,8 @@ def clear_table(table_name) -> object:
         else:
             logging.debug("Table cleaning skipped.")
 
-    return db
+    cursor.close()
+    db.close()
 
 
 @logger_config.logger